- \n
- JavaScript\u7684\u5386\u53f2\u548c\u53d1\u5c55<\/li>\n\n\n\n
- JavaScript\u7684\u7528\u9014\u548c\u5e94\u7528\u573a\u666f<\/li>\n\n\n\n
- JavaScript\u7684\u4f18\u7f3a\u70b9<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript\u57fa\u7840\n
- \n
- JavaScript\u7684\u6570\u636e\u7c7b\u578b<\/li>\n\n\n\n
- \u53d8\u91cf\u548c\u5e38\u91cf<\/li>\n\n\n\n
- \u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f<\/li>\n\n\n\n
- \u63a7\u5236\u8bed\u53e5\u548c\u6761\u4ef6\u8bed\u53e5<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript\u51fd\u6570\n
- \n
- \u51fd\u6570\u7684\u5b9a\u4e49\u548c\u8c03\u7528<\/li>\n\n\n\n
- \u51fd\u6570\u53c2\u6570\u548c\u8fd4\u56de\u503c<\/li>\n\n\n\n
- \u4f5c\u7528\u57df\u548c\u95ed\u5305<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript\u5bf9\u8c61\n
- \n
- \u5bf9\u8c61\u7684\u5b9a\u4e49\u548c\u4f7f\u7528<\/li>\n\n\n\n
- \u5c5e\u6027\u548c\u65b9\u6cd5<\/li>\n\n\n\n
- \u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u94fe<\/li>\n\n\n\n
- \u5bf9\u8c61\u7684\u7ee7\u627f<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript\u6570\u7ec4\n
- \n
- \u6570\u7ec4\u7684\u5b9a\u4e49\u548c\u4f7f\u7528<\/li>\n\n\n\n
- \u6570\u7ec4\u7684\u5e38\u7528\u65b9\u6cd5<\/li>\n\n\n\n
- \u591a\u7ef4\u6570\u7ec4<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript\u4e8b\u4ef6\n
- \n
- \u4e8b\u4ef6\u7684\u6982\u5ff5\u548c\u7c7b\u578b<\/li>\n\n\n\n
- \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u7684\u5b9a\u4e49\u548c\u4f7f\u7528<\/li>\n\n\n\n
- \u4e8b\u4ef6\u5bf9\u8c61<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript DOM\n
- \n
- DOM\u7684\u6982\u5ff5\u548c\u7ed3\u6784<\/li>\n\n\n\n
- DOM\u7684\u5e38\u7528\u65b9\u6cd5\u548c\u5c5e\u6027<\/li>\n\n\n\n
- \u8282\u70b9\u7684\u904d\u5386\u548c\u64cd\u4f5c<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript AJAX\n
- \n
- AJAX\u7684\u6982\u5ff5\u548c\u4f5c\u7528<\/li>\n\n\n\n
- AJAX\u7684\u539f\u7406\u548c\u5b9e\u73b0\u65b9\u5f0f<\/li>\n\n\n\n
- AJAX\u4e0e\u670d\u52a1\u5668\u4ea4\u4e92\u7684\u65b9\u6cd5<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript jQuery\n
- \n
- jQuery\u7684\u6982\u5ff5\u548c\u4f5c\u7528<\/li>\n\n\n\n
- jQuery\u7684\u5e38\u7528\u65b9\u6cd5\u548c\u5c5e\u6027<\/li>\n\n\n\n
- jQuery\u7684\u9009\u62e9\u5668\u548c\u4e8b\u4ef6<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- JavaScript\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\n
- \n
- \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6982\u5ff5\u548c\u539f\u5219<\/li>\n\n\n\n
- JavaScript\u4e2d\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/li>\n\n\n\n
- \u7c7b\u548c\u5bf9\u8c61\u7684\u5b9a\u4e49\u548c\u4f7f\u7528<\/li>\n\n\n\n
- \u7ee7\u627f\u548c\u591a\u6001<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u4ee5\u4e0a\u662f\u4e00\u4efd\u6bd4\u8f83\u5b8c\u6574\u7684JavaScript\u6559\u7a0b\u5185\u5bb9\u5217\u8868\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8c03\u6574\u548c\u6269\u5c55\u3002<\/p>\n\n\n\n\n\n
<\/figure>\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u7684\u5386\u53f2\u548c\u53d1\u5c55<\/p>\n\n\n\n
JavaScript\u662f\u4e00\u79cd\u6d41\u884c\u7684\u52a8\u6001\u7f16\u7a0b\u8bed\u8a00\uff0c\u7528\u4e8e\u4e3a\u7f51\u9875\u6dfb\u52a0\u4ea4\u4e92\u6027\u548c\u52a8\u6001\u6548\u679c\u3002\u4ee5\u4e0b\u662fJavaScript\u7684\u5386\u53f2\u548c\u53d1\u5c55\u6982\u8ff0\uff1a<\/p>\n\n\n\n
1995\u5e74\uff0c\u7f51\u666f\u516c\u53f8\u7684\u7a0b\u5e8f\u5458Brendan Eich\u4e3aNetscape Navigator\u6d4f\u89c8\u5668\u521b\u5efa\u4e86\u4e00\u79cd\u540d\u4e3aMocha\u7684\u811a\u672c\u8bed\u8a00\u3002\u540e\u6765Mocha\u88ab\u91cd\u547d\u540d\u4e3aLiveScript\uff0c\u6700\u7ec8\u66f4\u540d\u4e3aJavaScript\u3002JavaScript\u7684\u76ee\u6807\u662f\u63d0\u4f9b\u4e00\u79cd\u811a\u672c\u8bed\u8a00\uff0c\u4f7f\u5f00\u53d1\u8005\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u5411\u7f51\u9875\u6dfb\u52a0\u52a8\u6001\u6548\u679c\u3002<\/p>\n\n\n\n
1996\u5e74\uff0cMicrosoft\u63a8\u51fa\u4e86\u81ea\u5df1\u7684\u6d4f\u89c8\u5668Internet Explorer\uff0c\u5e76\u5728\u5176\u4e2d\u5d4c\u5165\u4e86\u81ea\u5df1\u7684\u811a\u672c\u8bed\u8a00JScript\u3002JScript\u4e0eJavaScript\u5177\u6709\u7c7b\u4f3c\u7684\u8bed\u6cd5\u548c\u529f\u80fd\uff0c\u4f46\u5e76\u4e0d\u5b8c\u5168\u517c\u5bb9\u3002<\/p>\n\n\n\n
1997\u5e74\uff0cJavaScript\u88ab\u63d0\u4ea4\u7ed9\u6b27\u6d32\u8ba1\u7b97\u673a\u5236\u9020\u5546\u534f\u4f1a(ECMA)\u6765\u8fdb\u884c\u6807\u51c6\u5316\u3002ECMA-262\u6807\u51c6\u5316\u4e86JavaScript\uff0c\u5236\u5b9a\u4e86\u4e00\u7ec4\u89c4\u5219\u548c\u6307\u5357\uff0c\u4f7fJavaScript\u66f4\u5177\u53ef\u79fb\u690d\u6027\uff0c\u5e76\u4fc3\u8fdb\u4e86\u5176\u5728Web\u5f00\u53d1\u4e2d\u7684\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n\n\n\n
\u5728\u63a5\u4e0b\u6765\u7684\u51e0\u5e74\u4e2d\uff0cJavaScript\u6210\u4e3a\u4e86Web\u5f00\u53d1\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u5e76\u4e14\u4e0eHTML\u548cCSS\u4e00\u8d77\uff0c\u6784\u6210\u4e86Web\u524d\u7aef\u6280\u672f\u7684\u6838\u5fc3\u3002\u968f\u7740\u6d4f\u89c8\u5668\u548cWeb\u6280\u672f\u7684\u53d1\u5c55\uff0cJavaScript\u4e5f\u5728\u4e0d\u65ad\u53d1\u5c55\u548c\u6539\u8fdb\u3002\u65b0\u7684ECMA\u6807\u51c6\uff0c\u5982ECMAScript 6(ES6)\u548cECMAScript 2022\uff0c\u4e0d\u65ad\u63a8\u51fa\u65b0\u7684\u7279\u6027\u548c\u8bed\u6cd5\uff0c\u4f7fJavaScript\u66f4\u52a0\u7075\u6d3b\u548c\u5f3a\u5927\u3002<\/p>\n\n\n\n
\u9664\u4e86\u5728Web\u5f00\u53d1\u4e2d\u5e7f\u6cdb\u5e94\u7528\u5916\uff0cJavaScript\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5f00\u53d1\u684c\u9762\u5e94\u7528\u7a0b\u5e8f\u3001\u6e38\u620f\u548c\u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\u7b49\u3002Node.js\u5219\u4f7fJavaScript\u4e5f\u53ef\u4ee5\u7528\u4e8e\u670d\u52a1\u5668\u7aef\u7f16\u7a0b\u3002\u73b0\u5728\uff0cJavaScript\u5df2\u6210\u4e3a\u6700\u53d7\u6b22\u8fce\u7684\u7f16\u7a0b\u8bed\u8a00\u4e4b\u4e00\uff0c\u662fWeb\u5f00\u53d1\u548c\u5e94\u7528\u5f00\u53d1\u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u6280\u672f\u4e4b\u4e00\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u7684\u7528\u9014\u548c\u5e94\u7528\u573a\u666f<\/p>\n\n\n\n
JavaScript\u662f\u4e00\u79cd\u975e\u5e38\u6d41\u884c\u7684\u811a\u672c\u7f16\u7a0b\u8bed\u8a00\uff0c\u4e3b\u8981\u7528\u4e8e\u4e3aWeb\u9875\u9762\u6dfb\u52a0\u4ea4\u4e92\u6027\u548c\u52a8\u6001\u6548\u679c\uff0c\u4ee5\u53ca\u521b\u5efa\u4e30\u5bcc\u7684Web\u5e94\u7528\u7a0b\u5e8f\u3002\u4ee5\u4e0b\u662fJavaScript\u7684\u4e3b\u8981\u7528\u9014\u548c\u5e94\u7528\u573a\u666f\uff1a<\/p>\n\n\n\n
- \n
- \u524d\u7aef\u5f00\u53d1 JavaScript\u662fWeb\u524d\u7aef\u5f00\u53d1\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u6280\u672f\u4e4b\u4e00\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u521b\u5efa\u4ea4\u4e92\u5f0f\u7528\u6237\u754c\u9762\u3001\u52a8\u6001\u7f51\u9875\u6548\u679c\u3001\u8868\u5355\u9a8c\u8bc1\u3001\u52a8\u753b\u6548\u679c\u3001\u9875\u9762\u5e03\u5c40\u3001\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u7b49\u3002\u5e38\u89c1\u7684\u524d\u7aef\u6846\u67b6\u548c\u5e93\uff0c\u5982React\u3001Vue.js\u3001Angular\u7b49\uff0c\u90fd\u662f\u57fa\u4e8eJavaScript\u5f00\u53d1\u7684\u3002<\/li>\n\n\n\n
- \u540e\u7aef\u5f00\u53d1 \u867d\u7136JavaScript\u6700\u521d\u662f\u4e3a\u524d\u7aef\u5f00\u53d1\u800c\u8bbe\u8ba1\u7684\uff0c\u4f46\u73b0\u5728JavaScript\u4e5f\u53ef\u4ee5\u7528\u4e8e\u670d\u52a1\u5668\u7aef\u7f16\u7a0b\u3002Node.js\u662f\u4e00\u79cd\u57fa\u4e8eJavaScript\u8bed\u8a00\u7684\u8fd0\u884c\u65f6\u73af\u5883\uff0c\u53ef\u4ee5\u5728\u670d\u52a1\u5668\u7aef\u8fd0\u884cJavaScript\u4ee3\u7801\u3002\u5b83\u5df2\u7ecf\u6210\u4e3a\u4e86Web\u5f00\u53d1\u4e2d\u975e\u5e38\u6d41\u884c\u7684\u6280\u672f\uff0c\u53ef\u4ee5\u7528\u4e8e\u6784\u5efa\u9ad8\u6548\u7684Web\u5e94\u7528\u7a0b\u5e8f\u548cAPI\u3002<\/li>\n\n\n\n
- \u6e38\u620f\u5f00\u53d1 JavaScript\u4e5f\u53ef\u4ee5\u7528\u4e8e\u6e38\u620f\u5f00\u53d1\u3002HTML5\u548cCanvas\u6280\u672f\u7684\u51fa\u73b0\u4f7f\u5f97\u4f7f\u7528JavaScript\u5f00\u53d1\u6e38\u620f\u6210\u4e3a\u4e86\u53ef\u80fd\u3002\u73b0\u5728\uff0c\u6709\u5f88\u591a\u57fa\u4e8eJavaScript\u7684\u6e38\u620f\u6846\u67b6\u548c\u5e93\uff0c\u5982Phaser\u3001Three.js\u3001Babylon.js\u7b49\u3002<\/li>\n\n\n\n
- \u79fb\u52a8\u5e94\u7528\u5f00\u53d1 JavaScript\u4e5f\u53ef\u4ee5\u7528\u4e8e\u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\u7684\u5f00\u53d1\u3002\u4f7f\u7528\u6846\u67b6\u548c\u5e93\uff0c\u5982React Native\u3001Ionic\u3001Cordova\u7b49\uff0c\u53ef\u4ee5\u4f7f\u7528JavaScript\u7f16\u5199\u539f\u751f\u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u5728\u591a\u4e2a\u5e73\u53f0\u4e0a\u90e8\u7f72\u3002<\/li>\n\n\n\n
- \u6d4f\u89c8\u5668\u6269\u5c55\u5f00\u53d1 \u6d4f\u89c8\u5668\u6269\u5c55\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7JavaScript\u6765\u7f16\u5199\u3002\u901a\u8fc7\u4f7f\u7528JavaScript\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4e3a\u6d4f\u89c8\u5668\u6dfb\u52a0\u81ea\u5b9a\u4e49\u529f\u80fd\u548c\u589e\u5f3a\u5de5\u5177\u3002<\/li>\n<\/ol>\n\n\n\n
\u603b\u4e4b\uff0cJavaScript\u7684\u5e94\u7528\u573a\u666f\u975e\u5e38\u5e7f\u6cdb\uff0c\u4e0d\u4ec5\u4ec5\u5c40\u9650\u4e8eWeb\u5f00\u53d1\u3002\u5b83\u662f\u4e00\u79cd\u591a\u7528\u9014\u7684\u8bed\u8a00\uff0c\u53ef\u4ee5\u7528\u4e8e\u8bb8\u591a\u4e0d\u540c\u7684\u9886\u57df\u548c\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u7684\u4f18\u7f3a\u70b9<\/p>\n\n\n\n
JavaScript\u4f5c\u4e3a\u4e00\u79cd\u6d41\u884c\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5177\u6709\u4ee5\u4e0b\u4f18\u7f3a\u70b9\uff1a<\/p>\n\n\n\n
\u4f18\u70b9\uff1a<\/p>\n\n\n\n
- \n
- \u5ba2\u6237\u7aef\u811a\u672c\u8bed\u8a00\uff1aJavaScript\u662f\u4e00\u79cd\u5ba2\u6237\u7aef\u811a\u672c\u8bed\u8a00\uff0c\u5b83\u53ef\u4ee5\u5728\u6d4f\u89c8\u5668\u4e2d\u76f4\u63a5\u6267\u884c\uff0c\u800c\u4e0d\u9700\u8981\u4efb\u4f55\u7f16\u8bd1\u8fc7\u7a0b\u3002\u8fd9\u4f7f\u5f97JavaScript\u975e\u5e38\u9002\u5408Web\u5f00\u53d1\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8Web\u5e94\u7528\u7a0b\u5e8f\u7684\u4ea4\u4e92\u6027\u548c\u52a8\u6001\u6548\u679c\u3002<\/li>\n\n\n\n
- \u7b80\u5355\u6613\u5b66\uff1aJavaScript\u8bed\u6cd5\u7b80\u5355\uff0c\u6613\u4e8e\u5b66\u4e60\u548c\u4f7f\u7528\u3002\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u5feb\u901f\u5165\u95e8\uff0c\u5e76\u5feb\u901f\u6784\u5efa\u4ea4\u4e92\u5f0fWeb\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n\n\n\n
- \u9762\u5411\u5bf9\u8c61\uff1aJavaScript\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5177\u6709\u826f\u597d\u7684\u5c01\u88c5\u6027\u3001\u7ee7\u627f\u6027\u548c\u591a\u6001\u6027\u3002<\/li>\n\n\n\n
- \u517c\u5bb9\u6027\u597d\uff1aJavaScript\u53ef\u4ee5\u5728\u6240\u6709\u73b0\u4ee3\u6d4f\u89c8\u5668\u4e0a\u8fd0\u884c\uff0c\u4e0d\u9700\u8981\u4efb\u4f55\u989d\u5916\u7684\u63d2\u4ef6\u6216\u6269\u5c55\u3002\u8fd9\u4f7f\u5f97JavaScript\u6210\u4e3aWeb\u5f00\u53d1\u4e2d\u5e7f\u6cdb\u4f7f\u7528\u7684\u6280\u672f\u4e4b\u4e00\u3002<\/li>\n\n\n\n
- \u52a8\u6001\u6027\uff1aJavaScript\u5177\u6709\u52a8\u6001\u6027\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u901a\u8fc7\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u4fee\u6539\u4ee3\u7801\u3001\u6dfb\u52a0\u65b0\u529f\u80fd\u6216\u5220\u9664\u73b0\u6709\u529f\u80fd\uff0c\u4f7f\u5f97\u5f00\u53d1\u66f4\u52a0\u7075\u6d3b\u548c\u9ad8\u6548\u3002<\/li>\n<\/ol>\n\n\n\n
\u7f3a\u70b9\uff1a<\/p>\n\n\n\n
- \n
- \u5b89\u5168\u95ee\u9898\uff1aJavaScript\u6267\u884c\u5728\u5ba2\u6237\u7aef\uff0c\u5bb9\u6613\u53d7\u5230\u653b\u51fb\u548c\u6ce8\u5165\u653b\u51fb\u3002\u5f00\u53d1\u4eba\u5458\u9700\u8981\u5bf9\u8f93\u5165\u7684\u6570\u636e\u8fdb\u884c\u4e25\u683c\u7684\u9a8c\u8bc1\u548c\u8fc7\u6ee4\uff0c\u4ee5\u4fdd\u8bc1\u5b89\u5168\u6027\u3002<\/li>\n\n\n\n
- \u517c\u5bb9\u6027\u95ee\u9898\uff1a\u5c3d\u7ba1\u73b0\u4ee3\u6d4f\u89c8\u5668\u90fd\u652f\u6301JavaScript\uff0c\u4f46\u662f\u4e0d\u540c\u6d4f\u89c8\u5668\u4e4b\u95f4\u7684JavaScript\u5b9e\u73b0\u53ef\u80fd\u6709\u6240\u4e0d\u540c\uff0c\u53ef\u80fd\u5bfc\u81f4\u517c\u5bb9\u6027\u95ee\u9898\u3002\u5f00\u53d1\u4eba\u5458\u9700\u8981\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u517c\u5bb9\u6027\u6d4b\u8bd5\uff0c\u4ee5\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u5728\u4e0d\u540c\u7684\u6d4f\u89c8\u5668\u4e2d\u5177\u6709\u76f8\u540c\u7684\u884c\u4e3a\u3002<\/li>\n\n\n\n
- \u53d8\u91cf\u4f5c\u7528\u57df\u95ee\u9898\uff1aJavaScript\u4e2d\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u662f\u51fd\u6570\u7ea7\u522b\u7684\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u53d8\u91cf\u91cd\u540d\u548c\u4f5c\u7528\u57df\u6df7\u4e71\u7684\u95ee\u9898\u3002\u8fd9\u9700\u8981\u5f00\u53d1\u4eba\u5458\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\u548c\u89c4\u8303\uff0c\u4ee5\u907f\u514d\u8fd9\u4e9b\u95ee\u9898\u3002<\/li>\n\n\n\n
- \u6027\u80fd\u95ee\u9898\uff1aJavaScript\u662f\u4e00\u79cd\u89e3\u91ca\u6027\u8bed\u8a00\uff0c\u6027\u80fd\u53ef\u80fd\u6bd4\u7f16\u8bd1\u578b\u8bed\u8a00\u6162\u3002\u5c3d\u7ba1\u73b0\u4ee3\u6d4f\u89c8\u5668\u5df2\u7ecf\u4f18\u5316\u4e86JavaScript\u7684\u6267\u884c\u6548\u7387\uff0c\u4f46\u5728\u5904\u7406\u5927\u91cf\u6570\u636e\u548c\u590d\u6742\u64cd\u4f5c\u65f6\uff0c\u6027\u80fd\u95ee\u9898\u4ecd\u7136\u53ef\u80fd\u6210\u4e3a\u95ee\u9898\u3002<\/li>\n<\/ol>\n\n\n\n
\u603b\u4e4b\uff0cJavaScript\u662f\u4e00\u79cd\u529f\u80fd\u5f3a\u5927\u3001\u6613\u4e8e\u5b66\u4e60\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u4f46\u4e5f\u6709\u4e00\u4e9b\u4e0d\u8db3\u4e4b\u5904\uff0c\u9700\u8981\u5f00\u53d1\u4eba\u5458\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u6ce8\u610f\u548c\u89e3\u51b3\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u7684\u6570\u636e\u7c7b\u578b<\/p>\n\n\n\n
JavaScript\u4e2d\u7684\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u5206\u4e3a\u4e24\u7c7b\uff1a\u539f\u59cb\u6570\u636e\u7c7b\u578b\u548c\u590d\u6742\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n
- \n
- \u539f\u59cb\u6570\u636e\u7c7b\u578b<\/li>\n<\/ol>\n\n\n\n
JavaScript\u4e2d\u7684\u539f\u59cb\u6570\u636e\u7c7b\u578b\u67095\u79cd\uff0c\u5b83\u4eec\u662f\uff1a<\/p>\n\n\n\n
- \n
- \u6570\u5b57\u7c7b\u578b\uff08Number\uff09\uff1a\u7528\u4e8e\u8868\u793a\u6570\u5b57\uff0c\u5305\u62ec\u6574\u6570\u548c\u6d6e\u70b9\u6570\u3002<\/li>\n\n\n\n
- \u5b57\u7b26\u4e32\u7c7b\u578b\uff08String\uff09\uff1a\u7528\u4e8e\u8868\u793a\u6587\u672c\u3002<\/li>\n\n\n\n
- \u5e03\u5c14\u7c7b\u578b\uff08Boolean\uff09\uff1a\u7528\u4e8e\u8868\u793a\u771f\u6216\u5047\u3002<\/li>\n\n\n\n
- \u7a7a\u503c\uff08null\uff09\uff1a\u8868\u793a\u4e00\u4e2a\u7a7a\u503c\u6216\u4e0d\u5b58\u5728\u7684\u5bf9\u8c61\u3002<\/li>\n\n\n\n
- \u672a\u5b9a\u4e49\uff08undefined\uff09\uff1a\u8868\u793a\u672a\u5b9a\u4e49\u7684\u503c\u3002<\/li>\n<\/ul>\n\n\n\n
\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u4eec\u7684\u503c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u4fee\u6539\u3002<\/p>\n\n\n\n
- \n
- \u590d\u6742\u6570\u636e\u7c7b\u578b<\/li>\n<\/ol>\n\n\n\n
JavaScript\u4e2d\u7684\u590d\u6742\u6570\u636e\u7c7b\u578b\u67093\u79cd\uff0c\u5b83\u4eec\u662f\uff1a<\/p>\n\n\n\n
- \n
- \u5bf9\u8c61\u7c7b\u578b\uff08Object\uff09\uff1a\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u5bf9\u8c61\uff0c\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/li>\n\n\n\n
- \u6570\u7ec4\u7c7b\u578b\uff08Array\uff09\uff1a\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u6709\u5e8f\u7684\u5217\u8868\uff0c\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n
- \u51fd\u6570\u7c7b\u578b\uff08Function\uff09\uff1a\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u63a5\u53d7\u53c2\u6570\u5e76\u8fd4\u56de\u503c\u3002<\/li>\n<\/ul>\n\n\n\n
\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u662f\u53ef\u53d8\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u4eec\u7684\u503c\u53ef\u4ee5\u52a8\u6001\u5730\u6dfb\u52a0\u3001\u4fee\u6539\u548c\u5220\u9664\u3002<\/p>\n\n\n\n
\u9664\u4e86\u4ee5\u4e0a\u6570\u636e\u7c7b\u578b\uff0cJavaScript\u8fd8\u6709\u4e24\u4e2a\u7279\u6b8a\u7684\u6570\u636e\u7c7b\u578b\uff1a<\/p>\n\n\n\n
- \n
- Symbol\u7c7b\u578b\uff1a\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u7b26\u3002<\/li>\n\n\n\n
- BigInt\u7c7b\u578b\uff1a\u7528\u4e8e\u8868\u793a\u4efb\u610f\u7cbe\u5ea6\u7684\u6574\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
\u603b\u4e4b\uff0cJavaScript\u4e2d\u6709\u4e30\u5bcc\u7684\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u6ee1\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u5f00\u53d1\u4eba\u5458\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavascript\u53d8\u91cf\u548c\u5e38\u91cf<\/p>\n\n\n\n
JavaScript\u4e2d\u7684\u53d8\u91cf\u548c\u5e38\u91cf\u90fd\u662f\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u7684\u6807\u8bc6\u7b26\u3002\u5b83\u4eec\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\uff0c\u53d8\u91cf\u7684\u503c\u53ef\u4ee5\u6539\u53d8\uff0c\u800c\u5e38\u91cf\u7684\u503c\u4e00\u65e6\u5b9a\u4e49\u540e\u5c31\u4e0d\u80fd\u6539\u53d8\u3002<\/p>\n\n\n\n
- \n
- \u53d8\u91cf<\/li>\n<\/ol>\n\n\n\n
JavaScript\u4e2d\u7684\u53d8\u91cf\u53ef\u4ee5\u7528var\u3001let\u548cconst\u4e09\u4e2a\u5173\u952e\u5b57\u6765\u58f0\u660e\u3002\u5728ES6\u4e4b\u524d\uff0c\u5f00\u53d1\u4eba\u5458\u901a\u5e38\u4f7f\u7528var\u6765\u58f0\u660e\u53d8\u91cf\uff0c\u4f46\u5b83\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\uff0c\u6bd4\u5982\u5b58\u5728\u53d8\u91cf\u63d0\u5347\u548c\u4f5c\u7528\u57df\u95ee\u9898\u3002ES6\u65b0\u589e\u4e86let\u548cconst\u5173\u952e\u5b57\u6765\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u3002<\/p>\n\n\n\n
\u4f7f\u7528var\u58f0\u660e\u7684\u53d8\u91cf\u5b58\u5728\u53d8\u91cf\u63d0\u5347\uff0c\u8fd9\u610f\u5473\u7740\u53d8\u91cf\u53ef\u4ee5\u5728\u58f0\u660e\u4e4b\u524d\u4f7f\u7528\uff0c\u4f46\u5176\u503c\u4e3aundefined\u3002\u4f7f\u7528let\u548cconst\u58f0\u660e\u7684\u53d8\u91cf\u4e0d\u5b58\u5728\u53d8\u91cf\u63d0\u5347\uff0c\u8fd9\u610f\u5473\u7740\u53d8\u91cf\u53ea\u80fd\u5728\u58f0\u660e\u4e4b\u540e\u4f7f\u7528\u3002<\/p>\n\n\n\n
\u53e6\u5916\uff0cvar\u58f0\u660e\u7684\u53d8\u91cf\u5b58\u5728\u51fd\u6570\u4f5c\u7528\u57df\uff0c\u800clet\u548cconst\u58f0\u660e\u7684\u53d8\u91cf\u5b58\u5728\u5757\u7ea7\u4f5c\u7528\u57df\u3002\u5757\u7ea7\u4f5c\u7528\u57df\u662f\u6307\u5728\u4e00\u4e2a\u4ee3\u7801\u5757\uff08\u6bd4\u5982if\u8bed\u53e5\u6216\u5faa\u73af\uff09\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\u53ea\u5728\u8be5\u5757\u4e2d\u6709\u6548\u3002<\/p>\n\n\n\n
\u53d8\u91cf\u53ef\u4ee5\u8d4b\u4e88\u4efb\u610f\u7c7b\u578b\u7684\u503c\uff0c\u5305\u62ec\u539f\u59cb\u7c7b\u578b\u548c\u590d\u6742\u7c7b\u578b\u3002\u53d8\u91cf\u53ef\u4ee5\u901a\u8fc7\u8d4b\u503c\u8fd0\u7b97\u7b26\uff08=\uff09\u6765\u6539\u53d8\u5176\u503c\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5404\u79cd\u7b97\u672f\u8fd0\u7b97\u7b26\u3001\u903b\u8f91\u8fd0\u7b97\u7b26\u3001\u4f4d\u8fd0\u7b97\u7b26\u7b49\u6765\u6539\u53d8\u5176\u503c\u3002<\/p>\n\n\n\n
- \n
- \u5e38\u91cf<\/li>\n<\/ol>\n\n\n\n
JavaScript\u4e2d\u7684\u5e38\u91cf\u7528const\u5173\u952e\u5b57\u6765\u58f0\u660e\u3002\u5e38\u91cf\u5728\u5b9a\u4e49\u540e\u4e0d\u80fd\u88ab\u91cd\u65b0\u8d4b\u503c\uff0c\u5426\u5219\u4f1a\u629b\u51fa\u9519\u8bef\u3002\u5e38\u91cf\u7684\u503c\u5fc5\u987b\u5728\u5b9a\u4e49\u65f6\u521d\u59cb\u5316\uff0c\u5426\u5219\u4e5f\u4f1a\u629b\u51fa\u9519\u8bef\u3002<\/p>\n\n\n\n
\u5e38\u91cf\u5728\u5b9a\u4e49\u540e\u4e0d\u80fd\u88ab\u4fee\u6539\uff0c\u4f46\u5982\u679c\u5e38\u91cf\u7684\u503c\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5219\u5bf9\u8c61\u7684\u5c5e\u6027\u662f\u53ef\u4ee5\u4fee\u6539\u7684\u3002\u8fd9\u662f\u56e0\u4e3a\u5e38\u91cf\u5b58\u50a8\u7684\u662f\u4e00\u4e2a\u5185\u5b58\u5730\u5740\uff0c\u5bf9\u8c61\u7684\u5c5e\u6027\u53ef\u4ee5\u901a\u8fc7\u8be5\u5730\u5740\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u3002\u4f46\u662f\uff0c\u5982\u679c\u5c1d\u8bd5\u7ed9\u5e38\u91cf\u91cd\u65b0\u8d4b\u503c\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\uff0c\u5219\u4f1a\u629b\u51fa\u9519\u8bef\u3002<\/p>\n\n\n\n
\u603b\u4e4b\uff0c\u53d8\u91cf\u548c\u5e38\u91cf\u662fJavaScript\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\u3002\u5f00\u53d1\u4eba\u5458\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u6807\u8bc6\u7b26\u6765\u5b58\u50a8\u6570\u636e\uff0c\u5e76\u6ce8\u610f\u53d8\u91cf\u4f5c\u7528\u57df\u548c\u5e38\u91cf\u4e0d\u53ef\u53d8\u7684\u7279\u6027\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavascript\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f<\/p>\n\n\n\n
JavaScript\u4e2d\u7684\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\u662f\u7528\u4e8e\u6267\u884c\u5404\u79cd\u7b97\u672f\u3001\u903b\u8f91\u548c\u4f4d\u8fd0\u7b97\u7684\u5173\u952e\u5143\u7d20\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5e38\u89c1\u7684\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\uff0c\u5e76\u89e3\u91ca\u5b83\u4eec\u7684\u7528\u6cd5\u548c\u4f18\u5148\u7ea7\u3002<\/p>\n\n\n\n
- \n
- \u8fd0\u7b97\u7b26<\/li>\n<\/ol>\n\n\n\n
JavaScript\u4e2d\u7684\u8fd0\u7b97\u7b26\u5305\u62ec\u4ee5\u4e0b\u7c7b\u578b\uff1a<\/p>\n\n\n\n
- \n
- \u7b97\u672f\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u6267\u884c\u57fa\u672c\u7684\u7b97\u672f\u8fd0\u7b97\uff0c\u5305\u62ec\u52a0\uff08+\uff09\u3001\u51cf\uff08-\uff09\u3001\u4e58\uff08*\uff09\u3001\u9664\uff08\/\uff09\u3001\u53d6\u4f59\uff08%\uff09\u548c\u81ea\u589e\uff08++\uff09\u548c\u81ea\u51cf\uff08–\uff09\u3002<\/li>\n\n\n\n
- \u6bd4\u8f83\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u5927\u5c0f\u5173\u7cfb\uff0c\u5305\u62ec\u7b49\u4e8e\uff08==\uff09\u3001\u4e0d\u7b49\u4e8e\uff08!=\uff09\u3001\u4e25\u683c\u76f8\u7b49\uff08===\uff09\u3001\u4e25\u683c\u4e0d\u76f8\u7b49\uff08!==\uff09\u3001\u5927\u4e8e\uff08>\uff09\u3001\u5c0f\u4e8e\uff08<\uff09\u3001\u5927\u4e8e\u7b49\u4e8e\uff08>=\uff09\u548c\u5c0f\u4e8e\u7b49\u4e8e\uff08<=\uff09\u3002<\/li>\n\n\n\n
- \u903b\u8f91\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u6267\u884c\u903b\u8f91\u64cd\u4f5c\uff0c\u5305\u62ec\u903b\u8f91\u4e0e\uff08&&\uff09\u3001\u903b\u8f91\u6216\uff08||\uff09\u548c\u903b\u8f91\u975e\uff08!\uff09\u3002<\/li>\n\n\n\n
- \u4f4d\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u5bf9\u4e8c\u8fdb\u5236\u6570\u5b57\u8fdb\u884c\u64cd\u4f5c\uff0c\u5305\u62ec\u6309\u4f4d\u4e0e\uff08&\uff09\u3001\u6309\u4f4d\u6216\uff08|\uff09\u3001\u6309\u4f4d\u5f02\u6216\uff08^\uff09\u3001\u6309\u4f4d\u975e\uff08~\uff09\u3001\u5de6\u79fb\uff08<<\uff09\u548c\u53f3\u79fb\uff08>>\uff09\u3002<\/li>\n\n\n\n
- \u8d4b\u503c\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u5c06\u4e00\u4e2a\u503c\u8d4b\u7ed9\u4e00\u4e2a\u53d8\u91cf\uff0c\u5305\u62ec\u7b80\u5355\u8d4b\u503c\uff08=\uff09\u548c\u590d\u5408\u8d4b\u503c\uff08+=\u3001-=\u3001*=\u3001\/=\u3001%=\u3001<<=\u3001>>=\u3001&=\u3001|=\u3001^=\uff09\u3002<\/li>\n\n\n\n
- \u6761\u4ef6\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u6839\u636e\u6761\u4ef6\u6765\u9009\u62e9\u6267\u884c\u4e0d\u540c\u7684\u4ee3\u7801\uff0c\u5305\u62ec\u4e09\u76ee\u8fd0\u7b97\u7b26\uff08? :\uff09\u3002<\/li>\n\n\n\n
- \u5176\u4ed6\u8fd0\u7b97\u7b26\uff1a\u5305\u62ectypeof\u3001instanceof\u3001delete\u3001void\u7b49\u8fd0\u7b97\u7b26\uff0c\u7528\u4e8e\u6267\u884c\u7279\u6b8a\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n
- \n
- \u8868\u8fbe\u5f0f<\/li>\n<\/ol>\n\n\n\n
\u8868\u8fbe\u5f0f\u662f\u7531\u8fd0\u7b97\u7b26\u548c\u64cd\u4f5c\u6570\u7ec4\u6210\u7684\u7ed3\u6784\uff0c\u7528\u4e8e\u6267\u884c\u5404\u79cd\u64cd\u4f5c\u5e76\u751f\u6210\u4e00\u4e2a\u503c\u3002JavaScript\u4e2d\u7684\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5305\u62ec\u4ee5\u4e0b\u7c7b\u578b\uff1a<\/p>\n\n\n\n
- \n
- \u5b57\u9762\u91cf\u8868\u8fbe\u5f0f\uff1a\u76f4\u63a5\u5305\u542b\u4e00\u4e2a\u503c\uff0c\u6bd4\u5982\u6570\u5b57\u3001\u5b57\u7b26\u4e32\u3001\u5e03\u5c14\u503c\u7b49\u3002<\/li>\n\n\n\n
- \u53d8\u91cf\u8868\u8fbe\u5f0f\uff1a\u5305\u542b\u4e00\u4e2a\u53d8\u91cf\u540d\uff0c\u7528\u4e8e\u5f15\u7528\u4e00\u4e2a\u53d8\u91cf\u7684\u503c\u3002<\/li>\n\n\n\n
- \u7b97\u672f\u8868\u8fbe\u5f0f\uff1a\u5305\u542b\u7b97\u672f\u8fd0\u7b97\u7b26\u548c\u64cd\u4f5c\u6570\uff0c\u7528\u4e8e\u6267\u884c\u7b97\u672f\u8fd0\u7b97\u3002<\/li>\n\n\n\n
- \u6bd4\u8f83\u8868\u8fbe\u5f0f\uff1a\u5305\u542b\u6bd4\u8f83\u8fd0\u7b97\u7b26\u548c\u64cd\u4f5c\u6570\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u5927\u5c0f\u5173\u7cfb\u3002<\/li>\n\n\n\n
- \u903b\u8f91\u8868\u8fbe\u5f0f\uff1a\u5305\u542b\u903b\u8f91\u8fd0\u7b97\u7b26\u548c\u64cd\u4f5c\u6570\uff0c\u7528\u4e8e\u6267\u884c\u903b\u8f91\u64cd\u4f5c\u3002<\/li>\n\n\n\n
- \u51fd\u6570\u8c03\u7528\u8868\u8fbe\u5f0f\uff1a\u5305\u542b\u51fd\u6570\u540d\u548c\u53c2\u6570\u5217\u8868\uff0c\u7528\u4e8e\u8c03\u7528\u4e00\u4e2a\u51fd\u6570\u5e76\u8fd4\u56de\u5176\u8fd4\u56de\u503c\u3002<\/li>\n\n\n\n
- \u5bf9\u8c61\u6210\u5458\u8868\u8fbe\u5f0f\uff1a\u5305\u542b\u4e00\u4e2a\u5bf9\u8c61\u548c\u4e00\u4e2a\u5c5e\u6027\u540d\uff0c\u7528\u4e8e\u5f15\u7528\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\u3002<\/li>\n\n\n\n
- \u6761\u4ef6\u8868\u8fbe\u5f0f\uff1a\u5305\u542b\u6761\u4ef6\u8fd0\u7b97\u7b26\u548c\u64cd\u4f5c\u6570\uff0c\u7528\u4e8e\u6839\u636e\u6761\u4ef6\u6765\u9009\u62e9\u6267\u884c\u4e0d\u540c\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n\n\n\n
- \n
- \u4f18\u5148\u7ea7<\/li>\n<\/ol>\n\n\n\n
\u4e0d\u540c\u7c7b\u578b\u7684\u8fd0\u7b97\u7b26\u5728JavaScript\u4e2d\u5177\u6709\u4e0d\u540c\u7684\u4f18\u5148\u7ea7\u3002\u4f18\u5148<\/p>\n\n\n\n\n\n
\u7ee7\u7eed<\/p>\n\n\n\n
\u7ea7\u51b3\u5b9a\u4e86\u8fd0\u7b97\u7b26\u5728\u8868\u8fbe\u5f0f\u4e2d\u7684\u6267\u884c\u987a\u5e8f\u3002\u5982\u679c\u8868\u8fbe\u5f0f\u4e2d\u5305\u542b\u591a\u4e2a\u8fd0\u7b97\u7b26\uff0c\u90a3\u4e48\u4f18\u5148\u7ea7\u9ad8\u7684\u8fd0\u7b97\u7b26\u4f1a\u5148\u6267\u884c\uff0c\u800c\u4f18\u5148\u7ea7\u76f8\u540c\u7684\u8fd0\u7b97\u7b26\u5219\u4f1a\u6309\u7167\u4ece\u5de6\u5230\u53f3\u7684\u987a\u5e8f\u6267\u884c\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662fJavaScript\u4e2d\u5e38\u89c1\u7684\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7\uff0c\u6309\u7167\u4ece\u9ad8\u5230\u4f4e\u7684\u987a\u5e8f\u6392\u5217\uff1a<\/p>\n\n\n\n
- \n
- \u5c0f\u62ec\u53f7\uff08()\uff09<\/li>\n\n\n\n
- \u81ea\u589e\uff08++\uff09\u548c\u81ea\u51cf\uff08–\uff09<\/li>\n\n\n\n
- \u4e00\u5143\u8fd0\u7b97\u7b26\uff08+\u3001-\u3001~\u3001!\u3001typeof\u3001void\uff09<\/li>\n\n\n\n
- \u4e58\uff08*\uff09\u3001\u9664\uff08\/\uff09\u548c\u53d6\u4f59\uff08%\uff09<\/li>\n\n\n\n
- \u52a0\uff08+\uff09\u548c\u51cf\uff08-\uff09<\/li>\n\n\n\n
- \u5de6\u79fb\uff08<<\uff09\u548c\u53f3\u79fb\uff08>>\uff09<\/li>\n\n\n\n
- \u6309\u4f4d\u4e0e\uff08&\uff09<\/li>\n\n\n\n
- \u6309\u4f4d\u5f02\u6216\uff08^\uff09<\/li>\n\n\n\n
- \u6309\u4f4d\u6216\uff08|\uff09<\/li>\n\n\n\n
- \u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08<\u3001>\u3001<=\u3001>=\u3001instanceof\u3001in\uff09<\/li>\n\n\n\n
- \u7b49\u4e8e\u8fd0\u7b97\u7b26\uff08==\u3001!=\u3001===\u3001!==\uff09<\/li>\n\n\n\n
- \u903b\u8f91\u4e0e\uff08&&\uff09<\/li>\n\n\n\n
- \u903b\u8f91\u6216\uff08||\uff09<\/li>\n\n\n\n
- \u6761\u4ef6\u8fd0\u7b97\u7b26\uff08? :\uff09<\/li>\n\n\n\n
- \u8d4b\u503c\u8fd0\u7b97\u7b26\uff08=\u3001+=\u3001-=\u3001*=\u3001\/=\u3001%=\u3001<<=\u3001>>=\u3001&=\u3001^=\u3001|=\uff09<\/li>\n<\/ol>\n\n\n\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u867d\u7136JavaScript\u4e2d\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7\u548c\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u4e2d\u7684\u76f8\u4f3c\uff0c\u4f46\u662f\u5728\u5177\u4f53\u4f7f\u7528\u65f6\u8fd8\u662f\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u62ec\u53f7\u7684\u6dfb\u52a0\uff0c\u4ee5\u4fdd\u8bc1\u8868\u8fbe\u5f0f\u7684\u6b63\u786e\u6027\u3002<\/p>\n\n\n\n
\u603b\u4e4b\uff0cJavaScript\u4e2d\u7684\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\u662f\u7f16\u5199\u590d\u6742\u7684\u7a0b\u5e8f\u6240\u5fc5\u9700\u7684\u57fa\u672c\u5143\u7d20\u3002\u5bf9\u4e8e\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u719f\u7ec3\u638c\u63e1\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\u7684\u7528\u6cd5\u548c\u4f18\u5148\u7ea7\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u7684\u6761\u4ef6\u8bed\u53e5<\/p>\n\n\n\n
JavaScript\u4e2d\u7684\u6761\u4ef6\u8bed\u53e5\u4e3b\u8981\u5305\u62ecif\u8bed\u53e5\u3001if…else\u8bed\u53e5\u3001if…else if…else\u8bed\u53e5\u548cswitch\u8bed\u53e5\u3002<\/p>\n\n\n\n
- \n
- if\u8bed\u53e5<\/li>\n<\/ol>\n\n\n\n
if\u8bed\u53e5\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u6761\u4ef6\u662f\u5426\u6210\u7acb\uff0c\u5982\u679c\u6761\u4ef6\u6210\u7acb\uff0c\u5219\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\u5757\uff0c\u5426\u5219\u4e0d\u6267\u884c\u3002if\u8bed\u53e5\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
scssCopy code
if (condition) {\n \/\/ \u5982\u679c\u6761\u4ef6\u4e3a\u771f\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n\u5176\u4e2d\uff0ccondition\u662f\u8981\u68c0\u67e5\u7684\u6761\u4ef6\uff0c\u53ef\u4ee5\u662f\u4efb\u4f55\u53ef\u4ee5\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u7684\u8868\u8fbe\u5f0f\u3002\u5982\u679ccondition\u4e3a\u771f\uff0c\u90a3\u4e48if\u8bed\u53e5\u540e\u9762\u7684\u4ee3\u7801\u5757\u5c31\u4f1a\u88ab\u6267\u884c\u3002\u5982\u679ccondition\u4e3a\u5047\uff0c\u90a3\u4e48if\u8bed\u53e5\u540e\u9762\u7684\u4ee3\u7801\u5757\u5c31\u4f1a\u88ab\u8df3\u8fc7\u3002<\/p>\n\n\n\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684if\u8bed\u53e5\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let num = 10;\n\nif (num > 0) {\n console.log(\"\u8fd9\u4e2a\u6570\u5b57\u662f\u6b63\u6570\u3002\");\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cif\u8bed\u53e5\u4f1a\u68c0\u67e5\u53d8\u91cfnum\u7684\u503c\u662f\u5426\u5927\u4e8e0\u3002\u7531\u4e8e\u53d8\u91cfnum\u7684\u503c\u4e3a10\uff0c\u56e0\u6b64if\u8bed\u53e5\u540e\u9762\u7684\u4ee3\u7801\u5757\u4f1a\u88ab\u6267\u884c\uff0c\u63a7\u5236\u53f0\u5c06\u8f93\u51fa\u201c\u8fd9\u4e2a\u6570\u5b57\u662f\u6b63\u6570\u3002\u201d<\/p>\n\n\n\n
- \n
- if…else\u8bed\u53e5<\/li>\n<\/ol>\n\n\n\n
if…else\u8bed\u53e5\u5728if\u8bed\u53e5\u7684\u57fa\u7840\u4e0a\u6dfb\u52a0\u4e86\u4e00\u4e2aelse\u5757\uff0c\u7528\u4e8e\u5728\u6761\u4ef6\u4e0d\u6210\u7acb\u65f6\u6267\u884c\u53e6\u4e00\u6bb5\u4ee3\u7801\u5757\u3002if…else\u8bed\u53e5\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
arduinoCopy code
if (condition) {\n \/\/ \u5982\u679c\u6761\u4ef6\u4e3a\u771f\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757\n} else {\n \/\/ \u5982\u679c\u6761\u4ef6\u4e3a\u5047\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528if…else\u8bed\u53e5\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let num = -10;\n\nif (num > 0) {\n console.log(\"\u8fd9\u4e2a\u6570\u5b57\u662f\u6b63\u6570\u3002\");\n} else {\n console.log(\"\u8fd9\u4e2a\u6570\u5b57\u662f\u8d1f\u6570\u3002\");\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cif\u8bed\u53e5\u4f1a\u68c0\u67e5\u53d8\u91cfnum\u7684\u503c\u662f\u5426\u5927\u4e8e0\u3002\u7531\u4e8e\u53d8\u91cfnum\u7684\u503c\u4e3a-10\uff0c\u56e0\u6b64if\u8bed\u53e5\u540e\u9762\u7684\u4ee3\u7801\u5757\u4e0d\u4f1a\u88ab\u6267\u884c\uff0c\u800c\u662f\u8df3\u8f6c\u5230else\u5757\u6267\u884c\u3002\u63a7\u5236\u53f0\u5c06\u8f93\u51fa\u201c\u8fd9\u4e2a\u6570\u5b57\u662f\u8d1f\u6570\u3002\u201d<\/p>\n\n\n\n
- \n
- if…else if…else\u8bed\u53e5<\/li>\n<\/ol>\n\n\n\n
if…else if…else\u8bed\u53e5\u662f\u5728if…else\u8bed\u53e5\u7684\u57fa\u7840\u4e0a\u6dfb\u52a0\u4e86\u591a\u4e2aelse if\u5757\uff0c\u7528\u4e8e\u68c0\u67e5\u591a\u4e2a\u6761\u4ef6\u5e76\u6267\u884c\u76f8\u5e94\u7684\u4ee3\u7801\u5757\u3002if…else if…else\u8bed\u53e5\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
arduinoCopy code
if (condition1) {\n \/\/ \u5982\u679c\u6761\u4ef61\u4e3a\u771f\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757\n} else if (condition2) {\n \/\/ \u5982\u679c\u6761\u4ef62\u4e3a\u771f\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757\n} else {\n \/\/ \u5982\u679c\u6761\u4ef61\u548c\u6761\u4ef62\u90fd\u4e3a\u5047\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528if…else if…else\u8bed\u53e5\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let num = 0;\n\nif (num > 0) {\n console.log(\"\u8fd9\u4e2a\u6570\u5b57\u662f\u6b63\u6570\u3002\");\n} else if (num < 0) {\n console.log(\"\u8fd9\u4e2a\u6570\u5b57\u662f\u8d1f\n<\/code><\/pre>\n\n\n\n\n\n\u7ee7\u7eed<\/p>\n\n\n\n
\u6570\u3002”); } else { console.log(“\u8fd9\u4e2a\u6570\u5b57\u662f\u96f6\u3002”); }<\/p>\n\n\n\n
arduinoCopy code
\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cif\u8bed\u53e5\u4f1a\u68c0\u67e5\u53d8\u91cfnum\u7684\u503c\u662f\u5426\u5927\u4e8e0\u3002\u7531\u4e8e\u53d8\u91cfnum\u7684\u503c\u4e3a0\uff0c\u56e0\u6b64if\u8bed\u53e5\u540e\u9762\u7684\u4ee3\u7801\u5757\u4e0d\u4f1a\u88ab\u6267\u884c\uff0c\u800c\u662f\u8df3\u8f6c\u5230\u7b2c\u4e00\u4e2aelse if\u5757\u3002\u7531\u4e8e\u6761\u4ef6num < 0\u4e0d\u6210\u7acb\uff0c\u7a0b\u5e8f\u4f1a\u7ee7\u7eed\u68c0\u67e5\u4e0b\u4e00\u4e2aelse if\u5757\uff0c\u76f4\u5230\u627e\u5230\u4e00\u4e2a\u6761\u4ef6\u6210\u7acb\u7684\u5757\u6216\u8005\u6267\u884c\u5b8c\u6240\u6709\u7684else if\u5757\u3002\u7531\u4e8e\u6700\u540e\u4e00\u4e2aelse\u5757\u7684\u6761\u4ef6\u4e3a\u5426\u5b9a\u6761\u4ef6\uff0c\u56e0\u6b64\u5b83\u7684\u4ee3\u7801\u5757\u603b\u662f\u4f1a\u88ab\u6267\u884c\u3002\u63a7\u5236\u53f0\u5c06\u8f93\u51fa\u201c\u8fd9\u4e2a\u6570\u5b57\u662f\u96f6\u3002\u201d\n\n4. switch\u8bed\u53e5\n\nswitch\u8bed\u53e5\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\uff0c\u5e76\u6267\u884c\u4e0e\u4e4b\u5339\u914d\u7684\u4ee3\u7801\u5757\u3002switch\u8bed\u53e5\u7684\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a\n\n<\/code><\/pre>\n\n\n\nswitch (expression) { case value1: \/\/ \u5982\u679cexpression\u7b49\u4e8evalue1\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757 break; case value2: \/\/ \u5982\u679cexpression\u7b49\u4e8evalue2\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757 break; default: \/\/ \u5982\u679cexpression\u4e0d\u7b49\u4e8e\u4efb\u4f55\u4e00\u4e2avalue\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u5757 }<\/p>\n\n\n\n
arduinoCopy code
\n\u5176\u4e2d\uff0cexpression\u662f\u8981\u68c0\u67e5\u7684\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u662f\u4efb\u4f55\u53ef\u4ee5\u8f6c\u6362\u4e3a\u4e00\u4e2a\u503c\u7684\u8868\u8fbe\u5f0f\u3002case\u540e\u9762\u7684\u503c\u53ef\u4ee5\u662f\u4efb\u4f55\u503c\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u548c\u5e03\u5c14\u503c\u7b49\u3002\u5982\u679cexpression\u7684\u503c\u7b49\u4e8e\u67d0\u4e2acase\u540e\u9762\u7684\u503c\uff0c\u90a3\u4e48\u5bf9\u5e94\u7684\u4ee3\u7801\u5757\u5c31\u4f1a\u88ab\u6267\u884c\u3002\u5982\u679cexpression\u7684\u503c\u4e0d\u7b49\u4e8e\u4efb\u4f55\u4e00\u4e2acase\u540e\u9762\u7684\u503c\uff0c\u90a3\u4e48\u6267\u884cdefault\u5757\u4e2d\u7684\u4ee3\u7801\u3002\n\n\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528switch\u8bed\u53e5\u7684\u793a\u4f8b\uff1a\n\n```javascript\nlet day = 2;\n\nswitch (day) {\n case 0:\n console.log(\"\u661f\u671f\u65e5\");\n break;\n case 1:\n console.log(\"\u661f\u671f\u4e00\");\n break;\n case 2:\n console.log(\"\u661f\u671f\u4e8c\");\n break;\n case 3:\n console.log(\"\u661f\u671f\u4e09\");\n break;\n case 4:\n console.log(\"\u661f\u671f\u56db\");\n break;\n case 5:\n console.log(\"\u661f\u671f\u4e94\");\n break;\n case 6:\n console.log(\"\u661f\u671f\u516d\");\n break;\n default:\n console.log(\"\u9519\u8bef\u7684\u65e5\u671f\");\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cswitch\u8bed\u53e5\u4f1a\u68c0\u67e5\u53d8\u91cfday\u7684\u503c\uff0c\u5e76\u6267\u884c\u4e0e\u4e4b\u5339\u914d\u7684\u4ee3\u7801\u5757\u3002\u7531\u4e8e\u53d8\u91cfday\u7684\u503c\u4e3a2\uff0c\u56e0\u6b64switch\u8bed\u53e5\u540e\u9762\u7684\u7b2c3\u4e2acase\u5757\u4f1a\u88ab\u6267\u884c\uff0c\u63a7\u5236\u53f0\u5c06\u8f93\u51fa\u201c\u661f\u671f\u4e8c\u201d\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavascript\u5faa\u73af\u63a7\u5236\u8bed\u53e5<\/p>\n\n\n\n
JavaScript\u63d0\u4f9b\u4e86\u51e0\u79cd\u5faa\u73af\u63a7\u5236\u8bed\u53e5\uff0c\u53ef\u4ee5\u7528\u4e8e\u91cd\u590d\u6267\u884c\u4ee3\u7801\u5757\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u5faa\u73af\u63a7\u5236\u8bed\u53e5\uff1a<\/p>\n\n\n\n
- \n
- for\u5faa\u73af<\/li>\n<\/ol>\n\n\n\n
for\u5faa\u73af\u53ef\u4ee5\u7528\u4e8e\u91cd\u590d\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\uff0c\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
scssCopy code
for (\u521d\u59cb\u5316\u8868\u8fbe\u5f0f; \u6761\u4ef6\u8868\u8fbe\u5f0f; \u66f4\u65b0\u8868\u8fbe\u5f0f) {\n \/\/ \u5f85\u6267\u884c\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n\u5176\u4e2d\uff0c\u521d\u59cb\u5316\u8868\u8fbe\u5f0f\u4f1a\u5728\u5faa\u73af\u5f00\u59cb\u524d\u6267\u884c\u4e00\u6b21\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u5faa\u73af\u8ba1\u6570\u5668\u7b49\u53d8\u91cf\u3002\u6761\u4ef6\u8868\u8fbe\u5f0f\u4f1a\u5728\u6bcf\u6b21\u5faa\u73af\u524d\u68c0\u67e5\uff0c\u53ea\u6709\u5f53\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u503c\u4e3atrue\u65f6\uff0c\u624d\u4f1a\u6267\u884c\u5f85\u6267\u884c\u7684\u4ee3\u7801\u5757\u3002\u66f4\u65b0\u8868\u8fbe\u5f0f\u4f1a\u5728\u6bcf\u6b21\u5faa\u73af\u7ed3\u675f\u540e\u6267\u884c\u4e00\u6b21\uff0c\u7528\u4e8e\u66f4\u65b0\u5faa\u73af\u8ba1\u6570\u5668\u7b49\u53d8\u91cf\u7684\u503c\u3002<\/p>\n\n\n\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528for\u5faa\u73af\u7684\u793a\u4f8b\uff0c\u8be5\u793a\u4f8b\u7528\u4e8e\u8ba1\u7b97\u4ece1\u523010\u7684\u6574\u6570\u4e4b\u548c\uff1a<\/p>\n\n\n\n
javascriptCopy code
let sum = 0;\n\nfor (let i = 1; i <= 10; i++) {\n sum += i;\n}\n\nconsole.log(sum); \/\/ \u8f93\u51fa55\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cfor\u5faa\u73af\u4f1a\u4ece1\u5f00\u59cb\uff0c\u6bcf\u6b21\u5c06\u53d8\u91cfi\u7684\u503c\u589e\u52a01\uff0c\u76f4\u5230i\u7684\u503c\u5927\u4e8e10\u3002\u5728\u6bcf\u6b21\u5faa\u73af\u4e2d\uff0c\u5f85\u6267\u884c\u7684\u4ee3\u7801\u5757\u4f1a\u5c06\u53d8\u91cfi\u7684\u503c\u52a0\u5230\u53d8\u91cfsum\u4e2d\u3002\u6700\u540e\uff0c\u63a7\u5236\u53f0\u5c06\u8f93\u51fa\u53d8\u91cfsum\u7684\u503c55\u3002<\/p>\n\n\n\n
- \n
- while\u5faa\u73af<\/li>\n<\/ol>\n\n\n\n
while\u5faa\u73af\u53ef\u4ee5\u7528\u4e8e\u91cd\u590d\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\uff0c\u53ea\u8981\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u503c\u4e3atrue\uff0c\u5c31\u4f1a\u4e00\u76f4\u6267\u884c\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
arduinoCopy code
while (\u6761\u4ef6\u8868\u8fbe\u5f0f) {\n \/\/ \u5f85\u6267\u884c\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n\u5728\u6bcf\u6b21\u5faa\u73af\u5f00\u59cb\u524d\uff0c\u6761\u4ef6\u8868\u8fbe\u5f0f\u90fd\u4f1a\u88ab\u91cd\u65b0\u8ba1\u7b97\uff0c\u53ea\u6709\u5f53\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u503c\u4e3atrue\u65f6\uff0c\u624d\u4f1a\u6267\u884c\u5f85\u6267\u884c\u7684\u4ee3\u7801\u5757\u3002\u5982\u679c\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u503c\u4e00\u5f00\u59cb\u5c31\u4e3afalse\uff0c\u90a3\u4e48\u5faa\u73af\u4e2d\u7684\u4ee3\u7801\u5757\u5c06\u4e0d\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n\n\n\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528while\u5faa\u73af\u7684\u793a\u4f8b\uff0c\u8be5\u793a\u4f8b\u7528\u4e8e\u8ba1\u7b97\u4ece1\u523010\u7684\u6574\u6570\u4e4b\u548c\uff1a<\/p>\n\n\n\n
javascriptCopy code
let sum = 0;\nlet i = 1;\n\nwhile (i <= 10) {\n sum += i;\n i++;\n}\n\nconsole.log(sum); \/\/ \u8f93\u51fa55\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cwhile\u5faa\u73af\u4f1a\u4ece1\u5f00\u59cb\uff0c\u6bcf\u6b21\u5c06\u53d8\u91cfi\u7684\u503c\u589e\u52a01\uff0c\u76f4\u5230i\u7684\u503c\u5927\u4e8e10\u3002\u5728\u6bcf\u6b21\u5faa\u73af\u4e2d\uff0c\u5f85\u6267\u884c\u7684\u4ee3\u7801\u5757\u4f1a\u5c06\u53d8\u91cfi\u7684\u503c\u52a0\u5230\u53d8\u91cfsum\u4e2d\u3002\u6700\u540e\uff0c\u63a7\u5236\u53f0\u5c06\u8f93\u51fa\u53d8\u91cfsum\u7684\u503c55\u3002<\/p>\n\n\n\n
- \n
- do-while\u5faa\u73af<\/li>\n<\/ol>\n\n\n\n
do-while\u5faa\u73af\u4e0ewhile\u5faa\u73af\u7c7b\u4f3c\uff0c\u4f46\u662f\u6761\u4ef6\u8868\u8fbe\u5f0f\u4f1a\u5728\u4ee3\u7801\u5757\u6267\u884c\u540e\u68c0\u67e5\uff0c\u800c\u4e0d\u662f\u5728\u4ee3\u7801\u5757\u6267\u884c\u524d\u68c0\u67e5\u3002\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
arduinoCopy code
do {\n \/\/ \u5f85\u6267\u884c\u7684\u4ee3\u7801\u5757\n} while (\u6761\u4ef6\u8868\u8fbe\u5f0f);\n<\/code><\/pre>\n\n\n\n\u5728\u6bcf\u6b21\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u6761\u4ef6\u8868\u8fbe\u5f0f\u90fd\u4f1a\u88ab\u91cd\u65b0\u8ba1\u7b97\uff0c\u53ea\u6709\u5f53\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u503c<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u51fd\u6570\u7684\u5b9a\u4e49\u548c\u8c03\u7528<\/p>\n\n\n\n
JavaScript\u51fd\u6570\u662f\u4e00\u6bb5\u53ef\u4ee5\u91cd\u590d\u4f7f\u7528\u7684\u4ee3\u7801\u5757\uff0c\u7528\u4e8e\u6267\u884c\u7279\u5b9a\u7684\u4efb\u52a1\u6216\u8fd4\u56de\u7279\u5b9a\u7684\u503c\u3002\u51fd\u6570\u7531\u51fd\u6570\u540d\u3001\u53c2\u6570\u5217\u8868\u548c\u51fd\u6570\u4f53\u7ec4\u6210\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684JavaScript\u51fd\u6570\u5b9a\u4e49\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function greet(name) {\n console.log(\"Hello, \" + name + \"!\");\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570\u540d\u4e3agreet\uff0c\u53c2\u6570\u5217\u8868\u5305\u542b\u4e00\u4e2a\u540d\u4e3aname\u7684\u53c2\u6570\uff0c\u51fd\u6570\u4f53\u5305\u542b\u4e00\u6761\u6253\u5370\u6b22\u8fce\u6d88\u606f\u7684\u8bed\u53e5\u3002<\/p>\n\n\n\n
\u8981\u8c03\u7528JavaScript\u51fd\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570\u540d\u548c\u9002\u5f53\u7684\u53c2\u6570\u5217\u8868\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8c03\u7528\u4e0a\u8ff0\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
greet(\"Alice\");\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u8c03\u7528\u4e86greet\u51fd\u6570\uff0c\u5e76\u5c06\u5b57\u7b26\u4e32”Alice”\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5b83\u3002\u51fd\u6570\u5c06\u6253\u5370\u4e00\u6761\u6b22\u8fce\u6d88\u606f\uff0c\u8be5\u6d88\u606f\u5305\u542b\u4e86\u6211\u4eec\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53c2\u6570\u503c\u3002<\/p>\n\n\n\n
\u5728JavaScript\u4e2d\uff0c\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u4e00\u4e2a\u503c\u3002\u8981\u4ece\u51fd\u6570\u4e2d\u8fd4\u56de\u4e00\u4e2a\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528return\u8bed\u53e5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8fd4\u56de\u4e24\u4e2a\u6570\u5b57\u4e4b\u548c\u7684\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function add(a, b) {\n return a + b;\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570\u540d\u4e3aadd\uff0c\u53c2\u6570\u5217\u8868\u5305\u542b\u4e24\u4e2a\u540d\u4e3aa\u548cb\u7684\u53c2\u6570\uff0c\u51fd\u6570\u4f53\u5305\u542b\u4e00\u6761return\u8bed\u53e5\uff0c\u8be5\u8bed\u53e5\u8fd4\u56de\u53c2\u6570a\u548cb\u7684\u548c\u3002<\/p>\n\n\n\n
\u8981\u4f7f\u7528\u4e0a\u8ff0\u51fd\u6570\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u548c\uff0c\u53ef\u4ee5\u8c03\u7528\u8be5\u51fd\u6570\u5e76\u5c06\u8981\u76f8\u52a0\u7684\u4e24\u4e2a\u6570\u5b57\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5b83\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n
javascriptCopy code
let result = add(3, 5);\nconsole.log(result); \/\/ \u8f93\u51fa8\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u8c03\u7528\u4e86add\u51fd\u6570\uff0c\u5e76\u5c06\u6570\u5b573\u548c5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5b83\u3002\u51fd\u6570\u5c06\u8fd4\u56de8\uff0c\u8be5\u503c\u88ab\u5b58\u50a8\u5728\u53d8\u91cfresult\u4e2d\uff0c\u5e76\u5728\u63a7\u5236\u53f0\u4e2d\u8f93\u51fa\u3002<\/p>\n\n\n\n
JavaScript\u51fd\u6570\u4e5f\u652f\u6301\u533f\u540d\u51fd\u6570\u548c\u51fd\u6570\u8868\u8fbe\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u51fd\u6570\u8868\u8fbe\u5f0f\u5b9a\u4e49\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let greet = function(name) {\n console.log(\"Hello, \" + name + \"!\");\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u51fd\u6570\u8868\u8fbe\u5f0f\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\uff0c\u5e76\u5c06\u8be5\u51fd\u6570\u8d4b\u503c\u7ed9\u53d8\u91cfgreet\u3002\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u50cf\u8c03\u7528\u666e\u901a\u51fd\u6570\u4e00\u6837\u8c03\u7528greet\u51fd\u6570\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n
javascriptCopy code
greet(\"Alice\");\n<\/code><\/pre>\n\n\n\n\u6b64\u65f6\uff0c\u51fd\u6570\u5c06\u6253\u5370\u4e00\u6761\u6b22\u8fce\u6d88\u606f\uff0c\u8be5\u6d88\u606f\u5305\u542b\u4e86\u6211\u4eec\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53c2\u6570\u503c\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u51fd\u6570\u53c2\u6570\u548c\u8fd4\u56de\u503c<\/p>\n\n\n\n
JavaScript\u51fd\u6570\u53ef\u4ee5\u63a5\u53d7\u4efb\u610f\u6570\u91cf\u7684\u53c2\u6570\uff0c\u5305\u62ec\u96f6\u4e2a\u6216\u591a\u4e2a\u53c2\u6570\u3002\u51fd\u6570\u7684\u53c2\u6570\u662f\u5728\u51fd\u6570\u5b9a\u4e49\u65f6\u58f0\u660e\u7684\uff0c\u5b83\u4eec\u88ab\u7528\u6765\u63a5\u6536\u6765\u81ea\u51fd\u6570\u8c03\u7528\u65f6\u4f20\u9012\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u51fd\u6570\u63a5\u53d7\u591a\u4e2a\u53c2\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function add(a, b) {\n return a + b;\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570add\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570a\u548cb\uff0c\u8fd9\u4e24\u4e2a\u53c2\u6570\u88ab\u7528\u6765\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u548c\uff0c\u5e76\u901a\u8fc7return\u8bed\u53e5\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u5728JavaScript\u4e2d\uff0c\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u4e00\u4e2a\u503c\u6216\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\u3002\u5982\u679c\u51fd\u6570\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\uff0c\u5219\u5176\u8fd4\u56de\u503c\u4e3aundefined\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function greet(name) {\n return \"Hello, \" + name + \"!\";\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570greet\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570name\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u6b22\u8fce\u6d88\u606f\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n
\u51fd\u6570\u7684\u8fd4\u56de\u503c\u53ef\u4ee5\u88ab\u8d4b\u503c\u7ed9\u53d8\u91cf\uff0c\u4e5f\u53ef\u4ee5\u88ab\u76f4\u63a5\u8f93\u51fa\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5c06\u51fd\u6570\u8fd4\u56de\u503c\u8d4b\u503c\u7ed9\u53d8\u91cf\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let result = add(3, 5);\nconsole.log(result);\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570add\u8fd4\u56de8\uff0c\u8be5\u503c\u88ab\u5b58\u50a8\u5728\u53d8\u91cfresult\u4e2d\uff0c\u5e76\u5728\u63a7\u5236\u53f0\u4e2d\u8f93\u51fa\u3002<\/p>\n\n\n\n
\u5982\u679c\u51fd\u6570\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u5219\u5728\u8c03\u7528\u8be5\u51fd\u6570\u65f6\u4e0d\u4f1a\u8fd4\u56de\u4efb\u4f55\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6ca1\u6709\u8fd4\u56de\u503c\u7684\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function greet(name) {\n console.log(\"Hello, \" + name + \"!\");\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570greet\u6253\u5370\u4e00\u6761\u6b22\u8fce\u6d88\u606f\uff0c\u4f46\u662f\u5b83\u6ca1\u6709\u8fd4\u56de\u4efb\u4f55\u503c\u3002\u5982\u679c\u6211\u4eec\u8c03\u7528\u8be5\u51fd\u6570\u5e76\u5c06\u8fd4\u56de\u503c\u8d4b\u503c\u7ed9\u4e00\u4e2a\u53d8\u91cf\uff0c\u8be5\u53d8\u91cf\u7684\u503c\u5c06\u4e3aundefined\uff1a<\/p>\n\n\n\n
javascriptCopy code
let result = greet(\"Alice\");\nconsole.log(result); \/\/ \u8f93\u51faundefined\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u8c03\u7528\u4e86greet\u51fd\u6570\uff0c\u5e76\u5c06\u5b57\u7b26\u4e32”Alice”\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5b83\u3002\u51fd\u6570\u5c06\u6253\u5370\u4e00\u6761\u6b22\u8fce\u6d88\u606f\uff0c\u4f46\u662f\u5b83\u6ca1\u6709\u8fd4\u56de\u4efb\u4f55\u503c\u3002\u56e0\u6b64\uff0c\u53d8\u91cfresult\u7684\u503c\u4e3aundefined\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u4f5c\u7528\u57df\u548c\u95ed\u5305<\/p>\n\n\n\n
JavaScript\u7684\u4f5c\u7528\u57df\u662f\u6307\u53d8\u91cf\u5728\u4ee3\u7801\u4e2d\u53ef\u89c1\u548c\u53ef\u8bbf\u95ee\u7684\u8303\u56f4\u3002\u5728JavaScript\u4e2d\uff0c\u4f5c\u7528\u57df\u6709\u5168\u5c40\u4f5c\u7528\u57df\u548c\u5c40\u90e8\u4f5c\u7528\u57df\u3002\u5168\u5c40\u4f5c\u7528\u57df\u6307\u6574\u4e2aJavaScript\u7a0b\u5e8f\u90fd\u53ef\u4ee5\u8bbf\u95ee\u7684\u53d8\u91cf\u548c\u51fd\u6570\uff0c\u800c\u5c40\u90e8\u4f5c\u7528\u57df\u6307\u5728\u51fd\u6570\u5185\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf\u548c\u51fd\u6570\u3002<\/p>\n\n\n\n
\u5f53\u5728\u51fd\u6570\u5185\u90e8\u5b9a\u4e49\u53d8\u91cf\u65f6\uff0c\u8be5\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u662f\u8be5\u51fd\u6570\u5185\u90e8\u3002\u5982\u679c\u5728\u51fd\u6570\u5916\u90e8\u5f15\u7528\u8be5\u53d8\u91cf\uff0c\u5219\u4f1a\u5f15\u53d1\u4e00\u4e2aReferenceError\u9519\u8bef\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function greet() {\n let message = \"Hello\";\n console.log(message);\n}\n\ngreet();\nconsole.log(message); \/\/ \u629b\u51faReferenceError\u9519\u8bef\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u53d8\u91cfmessage\u662f\u5728\u51fd\u6570greet\u5185\u90e8\u5b9a\u4e49\u7684\u3002\u56e0\u6b64\uff0c\u5b83\u53ea\u5728\u8be5\u51fd\u6570\u5185\u90e8\u53ef\u89c1\u3002\u5982\u679c\u6211\u4eec\u5c1d\u8bd5\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u8be5\u53d8\u91cf\uff0c\u5219\u4f1a\u629b\u51faReferenceError\u9519\u8bef\u3002<\/p>\n\n\n\n
\u95ed\u5305\u662f\u6307\u51fd\u6570\u80fd\u591f\u8bbf\u95ee\u5b9a\u4e49\u5728\u51fd\u6570\u5916\u90e8\u7684\u53d8\u91cf\u3002\u8fd9\u662f\u56e0\u4e3aJavaScript\u4f7f\u7528\u8bcd\u6cd5\u4f5c\u7528\u57df\uff08Lexical Scope\uff09\uff0c\u5373\u51fd\u6570\u5728\u5b9a\u4e49\u65f6\u5c31\u786e\u5b9a\u4e86\u5176\u4f5c\u7528\u57df\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u95ed\u5305\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function createCounter() {\n let count = 0;\n return function() {\n count++;\n console.log(count);\n };\n}\n\nlet counter = createCounter();\ncounter(); \/\/ \u8f93\u51fa1\ncounter(); \/\/ \u8f93\u51fa2\ncounter(); \/\/ \u8f93\u51fa3\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570createCounter\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u53ef\u4ee5\u8bbf\u95ee\u53d8\u91cfcount\u3002\u56e0\u6b64\uff0c\u6bcf\u6b21\u8c03\u7528counter\u51fd\u6570\u65f6\uff0c\u53d8\u91cfcount\u7684\u503c\u90fd\u4f1a\u589e\u52a0\uff0c\u5e76\u4e14\u5728\u63a7\u5236\u53f0\u4e2d\u8f93\u51fa\u65b0\u503c\u3002<\/p>\n\n\n\n
\u7531\u4e8e\u95ed\u5305\u80fd\u591f\u8bbf\u95ee\u5b9a\u4e49\u5728\u51fd\u6570\u5916\u90e8\u7684\u53d8\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u5177\u6709\u8bb8\u591a\u6709\u7528\u7684\u7528\u9014\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
- \n
- \u5c01\u88c5\u79c1\u6709\u6570\u636e\u548c\u65b9\u6cd5<\/li>\n\n\n\n
- \u6a21\u62df\u79c1\u6709\u6210\u5458\u53d8\u91cf\u548c\u65b9\u6cd5<\/li>\n\n\n\n
- \u521b\u5efa\u53ef\u91cd\u590d\u4f7f\u7528\u7684\u4ee3\u7801\u5757<\/li>\n<\/ul>\n\n\n\n
\u7136\u800c\uff0c\u95ed\u5305\u4e5f\u6709\u4e00\u4e9b\u7f3a\u70b9\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
- \n
- \u5185\u5b58\u6cc4\u6f0f\uff1a\u5982\u679c\u95ed\u5305\u4e2d\u7684\u51fd\u6570\u5f15\u7528\u4e86\u5916\u90e8\u51fd\u6570\u7684\u53d8\u91cf\uff0c\u90a3\u4e48\u5916\u90e8\u51fd\u6570\u7684\u53d8\u91cf\u4e0d\u4f1a\u88ab\u5783\u573e\u56de\u6536\u5668\u56de\u6536\uff0c\u76f4\u5230\u95ed\u5305\u4e0d\u518d\u88ab\u5f15\u7528\u3002<\/li>\n\n\n\n
- \u6027\u80fd\u95ee\u9898\uff1a\u7531\u4e8e\u95ed\u5305\u4e2d\u7684\u51fd\u6570\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u7684\u53d8\u91cf\uff0c\u56e0\u6b64\u95ed\u5305\u7684\u521b\u5efa\u548c\u8c03\u7528\u6bd4\u666e\u901a\u51fd\u6570\u66f4\u6162\u3002\u56e0\u6b64\uff0c\u4f7f\u7528\u95ed\u5305\u53ef\u80fd\u4f1a\u5f71\u54cd\u4ee3\u7801\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u5bf9\u8c61\u7684\u5b9a\u4e49\u548c\u4f7f\u7528<\/p>\n\n\n\n
\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u662f\u4e00\u79cd\u590d\u5408\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u5b58\u50a8\u952e\u503c\u5bf9\u3002\u5bf9\u8c61\u53ef\u4ee5\u5305\u542b\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u5c5e\u6027\u662f\u5bf9\u8c61\u4e2d\u7684\u53d8\u91cf\uff0c\u65b9\u6cd5\u662f\u5bf9\u8c61\u4e2d\u7684\u51fd\u6570\u3002<\/p>\n\n\n\n
\u5bf9\u8c61\u53ef\u4ee5\u901a\u8fc7\u5b57\u9762\u91cf\u6216\u6784\u9020\u51fd\u6570\u5b9a\u4e49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u5b57\u9762\u91cf\u5b9a\u4e49\u5bf9\u8c61\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let person = {\n name: \"John\",\n age: 30,\n sayHello: function() {\n console.log(\"Hello, my name is \" + this.name);\n }\n};\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3aperson\u7684\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u6709\u4e09\u4e2a\u5c5e\u6027\uff1aname\uff0cage\u548csayHello\u3002\u5c5e\u6027name\u548cage\u662f\u57fa\u672c\u7c7b\u578b\u7684\u503c\uff08\u5b57\u7b26\u4e32\u548c\u6570\u5b57\uff09\uff0c\u800c\u5c5e\u6027sayHello\u662f\u4e00\u4e2a\u51fd\u6570\u3002\u51fd\u6570sayHello\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528person\u5bf9\u8c61\u6765\u8bbf\u95ee\u3002<\/p>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u70b9\u53f7\uff08.\uff09\u6216\u65b9\u62ec\u53f7\uff08[]\uff09\u6765\u8bbf\u95ee\u5bf9\u8c61\u4e2d\u7684\u5c5e\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
console.log(person.name); \/\/ \u8f93\u51faJohn\nconsole.log(person[\"age\"]); \/\/ \u8f93\u51fa30\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u70b9\u53f7\u8bbf\u95ee\u5c5e\u6027name\uff0c\u4f7f\u7528\u65b9\u62ec\u53f7\u8bbf\u95ee\u5c5e\u6027age\u3002<\/p>\n\n\n\n
\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u4e3a\u5bf9\u8c61\u6dfb\u52a0\u5c5e\u6027\u548c\u65b9\u6cd5\u6765\u6269\u5c55\u5bf9\u8c61\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6269\u5c55\u5bf9\u8c61\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
person.email = \"john@example.com\";\nperson.sayGoodbye = function() {\n console.log(\"Goodbye, see you later!\");\n};\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u6dfb\u52a0\u4e86\u4e00\u4e2a\u540d\u4e3aemail\u7684\u5c5e\u6027\u548c\u4e00\u4e2a\u540d\u4e3asayGoodbye\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\u9664\u4e86\u5b57\u9762\u91cf\u5b9a\u4e49\u5bf9\u8c61\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528\u6784\u9020\u51fd\u6570\u6765\u521b\u5efa\u5bf9\u8c61\u3002\u6784\u9020\u51fd\u6570\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u521b\u5efa\u548c\u521d\u59cb\u5316\u5bf9\u8c61\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u6784\u9020\u51fd\u6570\u521b\u5efa\u5bf9\u8c61\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
function Person(name, age) {\n this.name = name;\n this.age = age;\n this.sayHello = function() {\n console.log(\"Hello, my name is \" + this.name);\n };\n}\n\nlet person1 = new Person(\"John\", 30);\nlet person2 = new Person(\"Jane\", 25);\n\nconsole.log(person1.name); \/\/ \u8f93\u51faJohn\nconsole.log(person2.age); \/\/ \u8f93\u51fa25\nperson1.sayHello(); \/\/ \u8f93\u51faHello, my name is John\nperson2.sayHello(); \/\/ \u8f93\u51faHello, my name is Jane\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3aPerson\u7684\u6784\u9020\u51fd\u6570\uff0c\u5b83\u6709\u4e24\u4e2a\u53c2\u6570\uff1aname\u548cage\u3002\u6784\u9020\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\uff0c\u5e76\u5c06name\u548cage\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u4f20\u9012\u7ed9\u6784\u9020\u51fd\u6570\u7684\u503c\u3002\u6784\u9020\u51fd\u6570\u8fd8\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3asayHello\u7684\u65b9\u6cd5\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528new\u5173\u952e\u5b57\u6765\u8c03\u7528\u6784\u9020\u51fd\u6570\uff0c\u5e76\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Person\u5bf9\u8c61\u3002\u6211\u4eec\u521b\u5efa\u4e86\u4e24\u4e2aPerson\u5bf9\u8c61\uff1aperson1\u548cperson2\u3002\u7136\u540e\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u70b9\u53f7\u8bbf\u95ee\u8fd9\u4e9b\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\u603b\u4e4b\uff0c\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u662f\u4e00\u79cd\u975e\u5e38\u91cd\u8981\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5b83\u4eec\u7528\u4e8e\u5b58\u50a8\u548c\u7ec4\u7ec7\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u3002\u901a\u8fc7\u4f7f\u7528\u5bf9\u8c61\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u6269\u5c55JavaScript\u7684\u529f\u80fd\uff0c\u521b\u5efa\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u5757\uff0c\u5e76\u5c06\u6570\u636e\u548c\u529f\u80fd\u7ec4\u7ec7\u5728\u4e00\u8d77\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5<\/p>\n\n\n\n
\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u53ef\u4ee5\u5305\u542b\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u5c5e\u6027\u662f\u5bf9\u8c61\u4e2d\u7684\u53d8\u91cf\uff0c\u65b9\u6cd5\u662f\u5bf9\u8c61\u4e2d\u7684\u51fd\u6570\u3002\u4ee5\u4e0b\u662f\u5bf9JavaScript\u5bf9\u8c61\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n
\u5bf9\u8c61\u5c5e\u6027<\/h3>\n\n\n\n
\u5bf9\u8c61\u5c5e\u6027\u662f\u5b58\u50a8\u5728\u5bf9\u8c61\u4e2d\u7684\u53d8\u91cf\u3002\u6bcf\u4e2a\u5c5e\u6027\u90fd\u6709\u4e00\u4e2a\u540d\u79f0\uff08\u4e5f\u79f0\u4e3a\u952e\u6216\u6807\u8bc6\u7b26\uff09\u548c\u4e00\u4e2a\u5bf9\u5e94\u7684\u503c\u3002\u5728JavaScript\u4e2d\uff0c\u6709\u4e24\u79cd\u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027\u7684\u65b9\u5f0f\uff1a<\/p>\n\n\n\n
- \n
- \u70b9\u53f7\uff08.\uff09\u7b26\uff1a\u4f7f\u7528\u5bf9\u8c61\u7684\u540d\u79f0\u548c\u5c5e\u6027\u540d\u79f0\u6765\u8bbf\u95ee\u5c5e\u6027\u3002\u4f8b\u5982\uff1aobj.propertyName\u3002<\/li>\n\n\n\n
- \u65b9\u62ec\u53f7\uff08[]\uff09\u7b26\uff1a\u4f7f\u7528\u5bf9\u8c61\u7684\u540d\u79f0\u548c\u5c5e\u6027\u540d\u79f0\u4f5c\u4e3a\u5b57\u7b26\u4e32\u6765\u8bbf\u95ee\u5c5e\u6027\u3002\u4f8b\u5982\uff1aobj[“propertyName”]\u3002<\/li>\n<\/ol>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u70b9\u53f7\u7b26\u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let person = {\n name: \"John\",\n age: 30,\n address: {\n street: \"123 Main St\",\n city: \"Anytown\",\n state: \"CA\"\n }\n};\n\nconsole.log(person.name); \/\/ \u8f93\u51faJohn\nconsole.log(person.age); \/\/ \u8f93\u51fa30\nconsole.log(person.address.street); \/\/ \u8f93\u51fa123 Main St\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3aperson\u7684\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u6709\u4e09\u4e2a\u5c5e\u6027\uff1aname\uff0cage\u548caddress\u3002\u5c5e\u6027name\u548cage\u662f\u57fa\u672c\u7c7b\u578b\u7684\u503c\uff08\u5b57\u7b26\u4e32\u548c\u6570\u5b57\uff09\uff0c\u800c\u5c5e\u6027address\u662f\u4e00\u4e2a\u5d4c\u5957\u5bf9\u8c61\u3002\u6211\u4eec\u4f7f\u7528\u70b9\u53f7\u8bbf\u95ee\u5c5e\u6027name\u548cage\uff0c\u4f7f\u7528\u70b9\u53f7\u548c\u5c5e\u6027\u540d\u79f0\u8bbf\u95eeaddress\u4e2d\u7684\u5c5e\u6027street\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u65b9\u62ec\u53f7\u7b26\u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let person = {\n name: \"John\",\n age: 30,\n address: {\n street: \"123 Main St\",\n city: \"Anytown\",\n state: \"CA\"\n }\n};\n\nconsole.log(person[\"name\"]); \/\/ \u8f93\u51faJohn\nconsole.log(person[\"age\"]); \/\/ \u8f93\u51fa30\nconsole.log(person[\"address\"][\"street\"]); \/\/ \u8f93\u51fa123 Main St\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u65b9\u62ec\u53f7\u7b26\u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027\uff0c\u8fd9\u4e0e\u4f7f\u7528\u70b9\u53f7\u7b26\u8bbf\u95ee\u5c5e\u6027\u7684\u65b9\u5f0f\u76f8\u540c\u3002<\/p>\n\n\n\n
\u5bf9\u8c61\u65b9\u6cd5<\/h3>\n\n\n\n
\u5bf9\u8c61\u65b9\u6cd5\u662f\u5b58\u50a8\u5728\u5bf9\u8c61\u4e2d\u7684\u51fd\u6570\u3002\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u5bf9\u8c61\u540d\u79f0\u548c\u65b9\u6cd5\u540d\u79f0\u6765\u8c03\u7528\u3002\u5728\u8c03\u7528\u5bf9\u8c61\u65b9\u6cd5\u65f6\uff0cJavaScript\u4f1a\u5c06\u5bf9\u8c61\u4f5c\u4e3a\u65b9\u6cd5\u7684\u4e0a\u4e0b\u6587\uff0c\u5e76\u5c06\u5176\u4f5c\u4e3a\u51fd\u6570\u4e2d\u7684this\u5173\u952e\u5b57\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u5bf9\u8c61\u65b9\u6cd5\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let person = {\n name: \"John\",\n age: 30,\n sayHello: function() {\n console.log(\"Hello, my name is \" + this.name);\n }\n};\n\nperson.sayHello(); \/\/ \u8f93\u51faHello, my name is John\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3aperson\u7684\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u6709\u4e09\u4e2a\u5c5e\u6027\uff1aname\uff0cage\u548csayHello\u3002\u5c5e\u6027name\u548cage\u662f\u57fa\u672c\u7c7b\u578b\u7684\u503c\uff0c\u800c\u5c5e\u6027sayHello\u662f\u4e00\u4e2a\u51fd\u6570\u3002\u51fd\u6570sayHello\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528person\u5bf9\u8c61\u6765\u8bbf\u95ee\u3002\u6211\u4eec\u8c03\u7528sayHello\u65b9\u6cd5\u65f6\uff0cJavaScript\u4f1a\u5c06person\u5bf9\u8c61\u4f5c\u4e3a\u65b9\u6cd5\u7684\u4e0a\u4e0b\u6587\uff0c\u5e76\u5c06\u5176\u4f5c\u4e3a\u51fd\u6570\u4e2d\u7684this\u5173\u952e\u5b57\u3002<\/p>\n\n\n\n
\u603b\u4e4b\uff0c\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u5c5e\u6027\u548c\u65b9\u6cd5\u662f\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u4eec\u8ba9\u6211\u4eec\u80fd\u591f\u8f7b\u677e\u5730\u5b58\u50a8\u548c\u7ec4\u7ec7\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4ee5\u53ca\u6269\u5c55JavaScript\u7684\u529f\u80fd\u548c\u7279\u6027\u3002<\/p>\n\n\n\n\n\n
\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u5bf9\u8c61\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u94fe<\/p>\n\n\n\n
JavaScript \u5bf9\u8c61\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u94fe\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\u3002\u5bf9\u8c61\u6784\u9020\u51fd\u6570\u662f\u7528\u6765\u521b\u5efa\u5bf9\u8c61\u7684\u6a21\u677f\uff0c\u5b83\u5b9a\u4e49\u4e86\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u51fd\u6570\u521b\u5efa\u591a\u4e2a\u76f8\u4f3c\u7684\u5bf9\u8c61\u3002\u539f\u578b\u94fe\u662f\u4e00\u79cd\u673a\u5236\uff0c\u7528\u4e8e\u5b9e\u73b0\u5bf9\u8c61\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u7ee7\u627f\u3002<\/p>\n\n\n\n
\u5728 JavaScript \u4e2d\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u539f\u578b\u5bf9\u8c61\uff08prototype\uff09\uff0c\u5b83\u662f\u4e00\u4e2a\u5305\u542b\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u5bf9\u8c61\u3002\u6bcf\u4e2a\u5bf9\u8c61\u7684\u539f\u578b\u5bf9\u8c61\u90fd\u662f\u7531\u4e00\u4e2a\u6784\u9020\u51fd\u6570\u7684 prototype \u5c5e\u6027\u6240\u6307\u5411\u7684\u5bf9\u8c61\u3002\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u65e0\u6cd5\u5728\u81ea\u5df1\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\u4e2d\u627e\u5230\u6240\u9700\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\uff0c\u5219\u4f1a\u5728\u5b83\u7684\u539f\u578b\u5bf9\u8c61\u4e2d\u67e5\u627e\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b9e\u73b0\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u7ee7\u627f\u3002<\/p>\n\n\n\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u6765\u8bf4\u660e\u5bf9\u8c61\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u94fe\u7684\u7528\u6cd5\uff1a<\/p>\n\n\n\n
javascriptCopy code
\/\/ \u5b9a\u4e49\u4e00\u4e2a\u5bf9\u8c61\u6784\u9020\u51fd\u6570\nfunction Person(name, age) {\n this.name = name;\n this.age = age;\n}\n\n\/\/ \u7ed9 Person \u5bf9\u8c61\u6dfb\u52a0\u4e00\u4e2a\u65b9\u6cd5\nPerson.prototype.sayHello = function() {\n console.log(\"Hello, my name is \" + this.name + \" and I'm \" + this.age + \" years old.\");\n}\n\n\/\/ \u521b\u5efa\u4e00\u4e2a Person \u5bf9\u8c61\u5b9e\u4f8b\nvar person1 = new Person(\"Alice\", 20);\n\n\/\/ \u8c03\u7528 Person \u5bf9\u8c61\u5b9e\u4f8b\u7684\u65b9\u6cd5\nperson1.sayHello(); \/\/ \u8f93\u51fa\uff1aHello, my name is Alice and I'm 20 years old.\n\n\/\/ \u521b\u5efa\u4e00\u4e2a Person \u5bf9\u8c61\u5b9e\u4f8b\nvar person2 = new Person(\"Bob\", 25);\n\n\/\/ \u8c03\u7528 Person \u5bf9\u8c61\u5b9e\u4f8b\u7684\u65b9\u6cd5\nperson2.sayHello(); \/\/ \u8f93\u51fa\uff1aHello, my name is Bob and I'm 25 years old.\n<\/code><\/pre>\n\n\n\n\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a
Person<\/code> \u7684\u5bf9\u8c61\u6784\u9020\u51fd\u6570\uff0c\u5b83\u6709\u4e24\u4e2a\u53c2\u6570name<\/code> \u548cage<\/code>\u3002\u5728Person<\/code> \u7684\u6784\u9020\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e24\u4e2a\u5c5e\u6027name<\/code> \u548cage<\/code>\uff0c\u5e76\u5c06\u5b83\u4eec\u7684\u503c\u5206\u522b\u8bbe\u7f6e\u4e3a\u4f20\u9012\u7ed9\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570name<\/code> \u548cage<\/code>\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528Person.prototype<\/code> \u6765\u6dfb\u52a0\u4e00\u4e2a\u540d\u4e3asayHello<\/code> \u7684\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u8f93\u51fa\u4e00\u4e2a\u4eba\u7684\u540d\u5b57\u548c\u5e74\u9f84\u3002<\/p>\n\n\n\n\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u901a\u8fc7
new<\/code> \u5173\u952e\u5b57\u6765\u521b\u5efa\u4e24\u4e2aPerson<\/code> \u5bf9\u8c61\u5b9e\u4f8bperson1<\/code> \u548cperson2<\/code>\uff0c\u5e76\u5c06\u5b83\u4eec\u7684\u540d\u5b57\u548c\u5e74\u9f84\u5206\u522b\u8bbe\u7f6e\u4e3aAlice<\/code> \u548c20<\/code>\uff0cBob<\/code> \u548c25<\/code>\u3002\u7136\u540e\uff0c\u6211\u4eec\u8c03\u7528\u4e86person1<\/code> \u548cperson2<\/code> \u5bf9\u8c61\u5b9e\u4f8b\u7684sayHello<\/code> \u65b9\u6cd5\u6765\u8f93\u51fa\u5b83\u4eec\u7684\u540d\u5b57\u548c\u5e74\u9f84\u3002<\/p>\n\n\n\n\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c
person1<\/code> \u548cperson2<\/code> \u5bf9\u8c61\u5b9e\u4f8b\u90fd\u7ee7\u627f\u4e86Person<\/code> \u5bf9\u8c61\u6784\u9020\u51fd\u6570\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u56e0\u4e3aPerson.prototype<\/code> \u4e2d\u5b9a\u4e49\u7684sayHello<\/code> \u65b9\u6cd5\u662f\u4e00\u4e2a\u5171\u4eab\u7684\u65b9\u6cd5\uff0c\u6240\u6709\u901a\u8fc7Person<\/code> \u5bf9\u8c61\u6784\u9020\u51fd\u6570\u521b\u5efa\u7684\u5bf9\u8c61\u5b9e\u4f8b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5b83\u3002\u8fd9\u5c31\u662f\u539f\u578b\u94fe\u7684\u4f5c\u7528\uff0c\u5b83\u5141\u8bb8\u5bf9\u8c61\u5b9e\u4f8b\u5728\u5b83\u4eec\u7684\u539f\u578b\u5bf9\u8c61\u4e2d\u67e5\u627e\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ee5\u5b9e\u73b0\u7ee7\u627f\u3002<\/p>\n\n\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u5bf9\u8c61\u7684\u7ee7\u627f<\/p>\n\n\n\n
\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u7ee7\u627f\u662f\u4e00\u79cd\u5bf9\u8c61\u95f4\u5171\u4eab\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u65b9\u5f0f\u3002\u5f53\u4e00\u4e2a\u5bf9\u8c61\u4ece\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7ee7\u627f\u5c5e\u6027\u548c\u65b9\u6cd5\u65f6\uff0c\u88ab\u7ee7\u627f\u7684\u5bf9\u8c61\u79f0\u4e3a\u7236\u5bf9\u8c61\u6216\u8d85\u7c7b\uff0c\u7ee7\u627f\u8fd9\u4e9b\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u5bf9\u8c61\u79f0\u4e3a\u5b50\u5bf9\u8c61\u6216\u5b50\u7c7b\u3002JavaScript\u652f\u6301\u591a\u79cd\u7ee7\u627f\u65b9\u5f0f\uff0c\u5305\u62ec\u539f\u578b\u7ee7\u627f\u3001\u6784\u9020\u51fd\u6570\u7ee7\u627f\u548c\u7ec4\u5408\u7ee7\u627f\u3002<\/p>\n\n\n\n
- \n
- \u539f\u578b\u7ee7\u627f<\/li>\n<\/ol>\n\n\n\n
\u539f\u578b\u7ee7\u627f\u662fJavaScript\u4e2d\u6700\u57fa\u672c\u7684\u7ee7\u627f\u65b9\u5f0f\u3002\u6bcf\u4e2aJavaScript\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u6307\u5411\u5176\u539f\u578b\u7684\u5185\u90e8\u6307\u9488\u3002\u5f53\u5bf9\u8c61\u9700\u8981\u8bbf\u95ee\u67d0\u4e2a\u5c5e\u6027\u6216\u65b9\u6cd5\u65f6\uff0c\u5b83\u4f1a\u9996\u5148\u5728\u81ea\u8eab\u5c5e\u6027\u548c\u65b9\u6cd5\u4e2d\u67e5\u627e\uff0c\u5982\u679c\u6ca1\u6709\u627e\u5230\uff0c\u5219\u4f1a\u53bb\u5176\u539f\u578b\u5bf9\u8c61\u4e2d\u67e5\u627e\u3002\u539f\u578b\u5bf9\u8c61\u4e5f\u6709\u81ea\u5df1\u7684\u539f\u578b\u5bf9\u8c61\uff0c\u8fd9\u6837\u5c31\u5f62\u6210\u4e86\u539f\u578b\u94fe\uff0c\u53ef\u4ee5\u5728\u4efb\u4f55\u7ea7\u522b\u4e0a\u5171\u4eab\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\u53ef\u4ee5\u4f7f\u7528
Object.create()<\/code>\u65b9\u6cd5\u6765\u521b\u5efa\u4e00\u4e2a\u65b0\u5bf9\u8c61\uff0c\u5e76\u5c06\u5176\u539f\u578b\u8bbe\u7f6e\u4e3a\u53e6\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4ece\u800c\u5b9e\u73b0\u539f\u578b\u7ee7\u627f\u3002<\/p>\n\n\n\njavascriptCopy code
\/\/ \u7236\u5bf9\u8c61\nconst person = {\n name: 'John',\n age: 30,\n greet() {\n console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);\n }\n};\n\n\/\/ \u5b50\u5bf9\u8c61\nconst student = Object.create(person);\nstudent.name = 'Alice';\nstudent.grade = 'A';\n\nstudent.greet(); \/\/ Hello, my name is Alice and I am 30 years old.\n<\/code><\/pre>\n\n\n\n- \n
- \u6784\u9020\u51fd\u6570\u7ee7\u627f<\/li>\n<\/ol>\n\n\n\n
\u6784\u9020\u51fd\u6570\u7ee7\u627f\u662f\u901a\u8fc7\u5728\u5b50\u7c7b\u6784\u9020\u51fd\u6570\u4e2d\u8c03\u7528\u7236\u7c7b\u6784\u9020\u51fd\u6570\uff0c\u4ece\u800c\u7ee7\u627f\u5176\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u5728\u6784\u9020\u51fd\u6570\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528
call()<\/code>\u6216apply()<\/code>\u65b9\u6cd5\u5c06\u7236\u7c7b\u7684this<\/code>\u5173\u952e\u5b57\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\uff0c\u4ece\u800c\u5728\u5b50\u7c7b\u5bf9\u8c61\u4e0a\u521b\u5efa\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n\n\n\njavascriptCopy code
\/\/ \u7236\u7c7b\u6784\u9020\u51fd\u6570\nfunction Person(name, age) {\n this.name = name;\n this.age = age;\n}\n\nPerson.prototype.greet = function() {\n console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);\n}\n\n\/\/ \u5b50\u7c7b\u6784\u9020\u51fd\u6570\nfunction Student(name, age, grade) {\n Person.call(this, name, age);\n this.grade = grade;\n}\n\nconst student = new Student('Alice', 20, 'A');\nstudent.greet(); \/\/ Hello, my name is Alice and I am 20 years old.\n<\/code><\/pre>\n\n\n\n\u4f7f\u7528\u6784\u9020\u51fd\u6570\u7ee7\u627f\u65f6\uff0c\u7236\u7c7b\u7684\u539f\u578b\u5bf9\u8c61\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u5b50\u7c7b\u7ee7\u627f\uff0c\u56e0\u6b64\u9700\u8981\u5728\u5b50\u7c7b\u6784\u9020\u51fd\u6570\u4e2d\u91cd\u65b0\u5b9a\u4e49\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n\n\n\n
- \n
- \u7ec4\u5408\u7ee7\u627f<\/li>\n<\/ol>\n\n\n\n
\u7ec4\u5408\u7ee7\u627f\u662f\u901a\u8fc7\u5c06\u539f\u578b\u7ee7\u627f\u548c\u6784\u9020\u51fd\u6570\u7ee7\u627f\u7ed3\u5408\u8d77\u6765\uff0c\u5b9e\u73b0\u6700\u5e38\u7528\u7684\u7ee7\u627f\u65b9\u5f0f\u3002\u5728\u7ec4\u5408\u7ee7\u627f\u4e2d\uff0c\u4f7f\u7528\u6784\u9020\u51fd\u6570\u7ee7\u627f\u5b9e\u73b0\u5c5e\u6027\u7684\u7ee7\u627f\uff0c\u4f7f\u7528\u539f\u578b\u7ee7\u627f\u5b9e\u73b0\u65b9\u6cd5\u7684\u7ee7\u627f\u3002<\/p>\n\n\n\n
javascriptCopy code
\/\/ \u7236\u7c7b\u6784\u9020\u51fd\u6570\nfunction Person(name, age) {\n this.name = name;\n this.age =\n<\/code><\/pre>\n\n\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caJavaScript\u6570\u7ec4\u7684\u5b9a\u4e49\u548c\u4f7f\u7528<\/p>\n\n\n\n
JavaScript\u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u5bf9\u8c61\uff0c\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a\u503c\u3002\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u503c\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u8be5\u7d22\u5f15\u8bbf\u95ee\u6216\u4fee\u6539\u8be5\u503c\u3002\u4ee5\u4e0b\u662fJavaScript\u6570\u7ec4\u7684\u4e00\u4e9b\u5b9a\u4e49\u548c\u4f7f\u7528\u65b9\u6cd5\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n
\u5b9a\u4e49\u6570\u7ec4<\/h2>\n\n\n\n
\u5728JavaScript\u4e2d\u5b9a\u4e49\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528
[]<\/code> \u6216Array<\/code> \u6784\u9020\u51fd\u6570\u3002\u4ee5\u4e0b\u662f\u4e24\u79cd\u5b9a\u4e49\u6570\u7ec4\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\njavascriptCopy code
\/\/ \u4f7f\u7528 [] \u5b9a\u4e49\u6570\u7ec4\nlet arr1 = [1, 2, 3];\n\n\/\/ \u4f7f\u7528 Array \u6784\u9020\u51fd\u6570\u5b9a\u4e49\u6570\u7ec4\nlet arr2 = new Array(4, 5, 6);\n<\/code><\/pre>\n\n\n\n\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20<\/h2>\n\n\n\n
\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7684\u7d22\u5f15\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u3002\u6570\u7ec4\u7d22\u5f15\u4ece
0<\/code> \u5f00\u59cb\uff0c\u4f9d\u6b21\u9012\u589e\u3002\u4ee5\u4e0b\u662f\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\njavascriptCopy code
let arr = [1, 2, 3];\n\n\/\/ \u8bbf\u95ee\u7b2c\u4e00\u4e2a\u5143\u7d20\nconsole.log(arr[0]); \/\/ \u8f93\u51fa 1\n\n\/\/ \u8bbf\u95ee\u7b2c\u4e8c\u4e2a\u5143\u7d20\nconsole.log(arr[1]); \/\/ \u8f93\u51fa 2\n\n\/\/ \u8bbf\u95ee\u7b2c\u4e09\u4e2a\u5143\u7d20\nconsole.log(arr[2]); \/\/ \u8f93\u51fa 3\n<\/code><\/pre>\n\n\n\n\u4fee\u6539\u6570\u7ec4\u5143\u7d20<\/h2>\n\n\n\n
\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7684\u7d22\u5f15\u4fee\u6539\u6570\u7ec4\u5143\u7d20\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u4fee\u6539\u6570\u7ec4\u5143\u7d20\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy code
let arr = [1, 2, 3];\n\n\/\/ \u4fee\u6539\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u503c\narr[0] = 4;\n\nconsole.log(arr); \/\/ \u8f93\u51fa [4, 2, 3]\n<\/code><\/pre>\n\n\n\n\u6570\u7ec4\u957f\u5ea6<\/h2>\n\n\n\n
\u53ef\u4ee5\u4f7f\u7528
length<\/code> \u5c5e\u6027\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u4ee5\u4e0b\u662f\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\njavascriptCopy code
let arr = [1, 2, 3];\n\nconsole.log(arr.length); \/\/ \u8f93\u51fa 3\n<\/code><\/pre>\n\n\n\n\u6570\u7ec4\u65b9\u6cd5<\/h2>\n\n\n\n
JavaScript\u6570\u7ec4\u63d0\u4f9b\u4e86\u8bb8\u591a\u65b9\u4fbf\u7684\u65b9\u6cd5\u6765\u64cd\u4f5c\u6570\u7ec4\uff0c\u4f8b\u5982\u6dfb\u52a0\u3001\u5220\u9664\u3001\u67e5\u627e\u3001\u6392\u5e8f\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u6570\u7ec4\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\u6dfb\u52a0\u5143\u7d20<\/h3>\n\n\n\n
- \n
push(item1, item2, ...)<\/code>\uff1a\u5411\u6570\u7ec4\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u6570\u7ec4\u7684\u65b0\u957f\u5ea6\u3002<\/li>\n\n\n\nunshift(item1, item2, ...)<\/code>\uff1a\u5411\u6570\u7ec4\u5f00\u5934\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u6570\u7ec4\u7684\u65b0\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\njavascriptCopy code
let arr = [1, 2];\n\n\/\/ push \u65b9\u6cd5\u5411\u6570\u7ec4\u672b\u5c3e\u6dfb\u52a0\u5143\u7d20\narr.push(3);\n\nconsole.log(arr); \/\/ \u8f93\u51fa [1, 2, 3]\n\n\/\/ unshift \u65b9\u6cd5\u5411\u6570\u7ec4\u5f00\u5934\u6dfb\u52a0\u5143\u7d20\narr.unshift(0);\n\nconsole.log(arr); \/\/ \u8f93\u51fa [0, 1, 2, 3]\n<\/code><\/pre>\n\n\n\n\u5220\u9664\u5143\u7d20<\/h3>\n\n\n\n
- \n
pop()<\/code>\uff1a\u5220\u9664\u6570\u7ec4\u672b\u5c3e\u7684\u5143\u7d20\uff0c\u8fd4\u56de\u5220\u9664\u7684\u5143\u7d20\u3002<\/li>\n\n\n\nshift()<\/code>\uff1a\u5220\u9664\u6570\u7ec4\u5f00\u5934\u7684\u5143\u7d20\uff0c\u8fd4\u56de\u5220\u9664\u7684\u5143\u7d20\u3002<\/li>\n\n\n\nsplice(index, count, item1, item2, ...)<\/code>\uff1a\u4ece\u6307\u5b9a\u7d22\u5f15\u4f4d\u7f6e\u5f00\u59cb\u5220\u9664\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\uff0c\u5e76\u53ef\u4ee5\u5728\u5220\u9664\u7684\u4f4d\u7f6e\u6dfb\u52a0\u65b0\u7684\u5143\u7d20\uff0c\u8fd4\u56de\u5220\u9664\u7684\u5143\u7d20\u7ec4\u6210\u7684\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\njavascriptCopy code
let arr = [1, 2, 3];\n\n\/\/ pop \u65b9\u6cd5\u5220\u9664\u6570\u7ec4\u672b\u5c3e\u7684\u5143\u7d20\nlet last = arr.pop();\n\nconsole.log(last); \/\/ \u8f93\u51fa 3\nconsole.log(arr); \/\/ \u8f93\u51fa [1, 2]\n\n\/\/ shift \u65b9\u6cd5\u5220\u9664\u6570\u7ec4\u5f00\u5934\u7684\n<\/code><\/pre>\n\n\n\n\n\n
- \u7ec4\u5408\u7ee7\u627f<\/li>\n<\/ol>\n\n\n\n
- \u6784\u9020\u51fd\u6570\u7ee7\u627f<\/li>\n<\/ol>\n\n\n\n
- \u539f\u578b\u7ee7\u627f<\/li>\n<\/ol>\n\n\n\n
- do-while\u5faa\u73af<\/li>\n<\/ol>\n\n\n\n
- while\u5faa\u73af<\/li>\n<\/ol>\n\n\n\n
- for\u5faa\u73af<\/li>\n<\/ol>\n\n\n\n
- if…else if…else\u8bed\u53e5<\/li>\n<\/ol>\n\n\n\n
- if…else\u8bed\u53e5<\/li>\n<\/ol>\n\n\n\n
- if\u8bed\u53e5<\/li>\n<\/ol>\n\n\n\n
- \u4f18\u5148\u7ea7<\/li>\n<\/ol>\n\n\n\n
- \u8868\u8fbe\u5f0f<\/li>\n<\/ol>\n\n\n\n
- \u8fd0\u7b97\u7b26<\/li>\n<\/ol>\n\n\n\n
- \u5e38\u91cf<\/li>\n<\/ol>\n\n\n\n
- \u53d8\u91cf<\/li>\n<\/ol>\n\n\n\n
- \u590d\u6742\u6570\u636e\u7c7b\u578b<\/li>\n<\/ol>\n\n\n\n
- \u539f\u59cb\u6570\u636e\u7c7b\u578b<\/li>\n<\/ol>\n\n\n\n