Getting Start With Composition API

I want to do a video of IT tutorial, can you arrange the text content of the video tutorial for me according to the content of the website. Let’s start with the Composition API tutorial, where you give me a list of things to cover. ChatGPT

Of course, I can give you a list of what to cover in the Composition API tutorial. The Composition API is an important feature in Vue.js 3, providing a new way to organize and reuse logic. The following is an outline of a possible Composition API tutorial:

1. Describes the Composition API
   • Explain what the Composition API is
   • Highlight why you use the Composition API and its advantages
2. Installation and setup
   • Demonstrates how to install Vue.js 3
   • Create a basic Vue.js 3 project
   • Introducing the Composition API
3. Basic usage
   • Create a simple component
   • Use the setup function
   • Use ref and reactive
   • Use and update of responsive data
   • Use computed properties and listeners
4. Combination functions
   • Introduces the concept of combinatorial functions
   • Creation of custom composition functions
   • Use composition functions in components
5. Lifecycle hooks
   • Use lifecycle hooks in the Composition API
   • Demonstrates how to use common lifecycle hooks
6. Reuse of custom logic
   • Describes the concept of logic reuse
   • Demonstrates how to create reusable logical functions
   • Reuse logical functions in different components
7. Inter-component communication
   • Describes several ways to communicate between components
   • Demonstrates how to implement intercomponent communication in the Composition API
8. Sample project
   • Create a more complex sample project that shows how to solve a real-world problem using the Composition API
9. Best practices and frequently asked questions
   • Provides some best practices for using the Composition API
   • Answer some common questions and questions
10. summary
    • Summarize the main features and usage of the Composition API
    • Highlight why the Composition API is an important feature in Vue.js 3

Note that this is just a possible outline that you can modify and extend according to your needs and goals.

Please explain in detail what Composition APIChatGPT is

The Composition API is a new feature in Vue.js 3 that provides a new way to organize and reuse logic. Traditional Vue.js applications typically use the Options API to define components where data, computed properties, methods, and lifecycle hooks, etc. are organized in a single object.

The Composition API takes a more flexible approach, allowing us to organize code based on logical features rather than component options. By using the Composition API, we can put related logic together to make the code more modular, more readable, and easier to reuse.

Using the Composition API, we can organize our code in the following ways:

1. setup function: Every component that uses the Composition API must contain a function called “setup”. In the setup function, we can declare reactive data, computed properties, methods, and logic such as subscription and listening.
2. ref and reactive: The Composition API introduces two functions, ref and reactive, to create reactive data. The ref function is used to create a single variable data, while the reactive function is used to create a responsive object with multiple properties.
3. Composition Functions: The Composition API allows us to combine logical code into reusable functions, called composition functions. These functions can receive parameters and return reactive data, computed properties, methods, and so on for components to use.
4. Lifecycle hooks: In the Composition API, we can use lifecycle hook functions (such as , , , etc.) to execute specific logic. This allows us to operate at different lifecycle stages of the component.onMountedonUpdatedonUnmounted
5. Inter-component communication: The Composition API provides functions such as and to enable inter-component communication. Through these functions, we can share data and logic between components, enabling a more flexible combination of components.provideinject

In short, the Composition API provides us with better code organization and logic reuse mechanisms. It gives us more flexibility to write Vue.js applications and better manage and maintain the code.

Please explain in detail why Composition API is used and its advantages with ChatGPT

There are several highlighted reasons and advantages of using the Composition API:

1. More flexible organization: The Composition API allows us to organize code according to logical features rather than component options. Traditional Options APIs organize data, computed properties, methods, and lifecycle hooks in an object, which can make the code difficult to understand and maintain when components become complex. The Composition API allows us to put related logic together, making the code more modular, more readable, and easier to reuse.
2. Better logic reuse: The Composition API makes logic reuse easier. We can combine related logic code into reusable functions, called composite functions. These composite functions can receive parameters and return reactive data, computed properties, methods, and so on for components to use. By combining functions, we can reuse logic in different components, thereby reducing duplicate code and improving code maintainability.
3. Better code organization and readability: Using the Composition API, we can put related code logic together without having to jump through different options. This improves the readability of the code and gives us a clearer picture of the code involved in each logical function.
4. Better type inference and IDE support: Since the Composition API is function-based, not option-based, this means that IDE tools can better derive types and provide features such as code completion and error checking. This makes the development process more efficient and reduces potential errors.
5. Better reactive support: The Composition API introduces ref and reactive functions to create reactive data. This allows us to declare and use reactive data more intuitively, without the need to use keywords to access the data like the Options API. This provides clearer, more reliable and responsive support.this
6. Better inter-component communication: The Composition API provides functions such as and to enable inter-component communication. Through these functions, we can share data and logic between components, enabling a more flexible combination of components. This makes communication between components more intuitive and flexible.provideinject

Overall, the Composition API improves Vue.js application development efficiency and code quality by providing more flexible organization, logic reuse, code organization and readability, type inference and IDE support, reactive support, and inter-component communication. It is an important feature of Vue.js 3 and is recommended for building complex and scalable applications.

Please explain in detail how to install Vue.js 3ChatGPT

To demonstrate how to install Vue.js 3, you can follow these steps:

1. Make sure your development environment has Node .js installed. If you haven’t already, go to the official Node .js website (https://nodejs.org/) to download and install the latest version for your operating system.
2. Open a command-line terminal (or use the terminal window of the integrated development environment).
3. Enter the following command on the command line to install the Vue CLI (Vue’s command-line tool):

shellCopy codenpm install -g @vue/cli

This will install the Vue CLI globally using npm (Node.js package manager).

4. After the installation is complete, you can use the following command to verify that the Vue CLI is installed successfully:

shellCopy codevue --version

If the installation is successful, the version number of the Vue CLI will be displayed.

5. Create a new Vue .js project. At the command line, go to the directory where you want to create the project and run the following command:

shellCopy codevue create my-vue-app

This will create a new project called “my-vue-app” using the Vue CLI. You can also replace “my-vue-app” with your favorite project name.

6. During the process of creating a project, the Vue CLI will prompt you to select some configuration options. You can use the up and down arrow keys on your keyboard to navigate through the options, and use the Enter key to make a selection. You can make custom selections according to your needs, or simply press Enter to use the default options.
7. The process of creating a project can take some time because the Vue CLI downloads and installs the dependencies required for the project. When the installation is complete, you’ll see a success prompt similar to the following:

shellCopy code🎉  Successfully created project my-vue-app.
👉  Get started with the following commands:

 $ cd my-vue-app
 $ npm run serve

8. Go to the project directory:

shellCopy codecd my-vue-app

9. Start the development server:

shellCopy codenpm run serve

This will start the development server and run the Vue .js application locally. You will see a URL in the command line, such as. Open the URL in your browser and you’ll see the welcome page for the Vue .js app.http://localhost:8080/

At this point, you have successfully installed Vue.js 3 and created a new Vue .js project. Now you can develop as needed, edit the project file, and start writing the code needed for the Composition API tutorial.

Please explain in detail how to introduce Composition APIChatGPT

To introduce the Composition API, you need to make some setup in the Vue.js 3 project. Here are the detailed steps:

1. Open the main entry file (usually OR) of your Vue.js 3 project.main.jsmain.ts
2. Add the following import statement at the top of the file:

javascriptCopy codeimport { createApp } from 'vue';
import { createPinia } from 'pinia';
import App from './App.vue';

Here we import the functions and functions, as well as the main components of the project.createAppcreatePiniaApp.vue

3. Create a Vue application instance and use the function to create a Pinia instance. In the function, pass the component as a parameter to it:createPiniacreateAppApp

javascriptCopy codeconst app = createApp(App);
const pinia = createPinia();

app.use(pinia);

Here, we use methods to introduce Pinia instances as plugins into Vue applications.app.use()

4. After creating a Vue application instance, use methods to mount the application to the specified DOM element. For example, mount the application on an element with id :mountapp

javascriptCopy codeapp.mount('#app');

At this point, you have successfully introduced the Composition API and completed the basic setup. Now you can use Composition API features in Vue components, such as functions, , , etc. to write specific logic.setuprefreactive

Note that in order to use the Composition API, you also need to install the library in your project. You can install via npm using the following command:@vue/composition-api

shellCopy codenpm install @vue/composition-api

After installation, you can use the Composition API feature in any Vue component in your project.

To summarize, the introduction of the Composition API requires the following steps:

1. Import the necessary modules and components.
2. Create a Vue application instance.
3. Create a Pinia instance using a function and register it as a plugin through a method.createPiniaapp.use()
4. Use methods to mount applications to DOM elements.mount
5. Install the library to use the Composition API features.@vue/composition-api

Once you’ve completed the above steps, you’re ready to start writing your logic using the Composition API in Vue components.

Please explain in detail how to create a simple component ChatGPT

To create a simple component, you can follow these steps:

1. In your Vue.js 3 project, choose a suitable location to create your component files. Typically, component files are named with extensions, eg..vueMyComponent.vue
2. Open the location of your choice and create a new file..vue
3. In the file, use the following basic structure to define a component:.vue

vueCopy code<template>
  <!-- 在这里定义组件的模板 -->
</template>

<script>
export default {
  // 在这里定义组件的逻辑
}
</script>

<style>
/* 在这里定义组件的样式 */
</style>

4. Inside the tag, you can write HTML code to define the template for the component. For example, create a component that contains simple text:<template>

vueCopy code<template>
  <div>
    <h1>Hello, World!</h1>
    <p>This is my first Vue.js component.</p>
  </div>
</template>

In this example, we simply define a container that contains a heading and a paragraph.<div><h1><p>

5. Inside the label, use to export the component object and define the logic of the component within the object. For example, add a property named to the component:<script>export defaultname

vueCopy code<script>
export default {
  name: 'MyComponent'
}
</script>

In this example, we define a component called it.MyComponent

6. Within the tab, you can define the style of the component. For example, add some styling to the title:<style>

vueCopy code<style>
h1 {
  color: blue;
  font-size: 24px;
}
</style>

In this example, we added a blue text color and a font size of 24 pixels to the title.<h1>

7. Save your component file and import it where you need to use it. For example, use this simple component in another component:

vueCopy code<template>
  <div>
    <h2>My App</h2>
    <my-component></my-component>
  </div>
</template>

<script>
import MyComponent from '@/components/MyComponent.vue';

export default {
  components: {
    MyComponent
  }
}
</script>

In this example, we imported a component named and registered it in the options. We then use tags in the template to render the component.MyComponentcomponents<my-component>

8. You can now use the components you created in your application. Make sure to launch your Vue.js 3 app and see the results in your browser.

This way, you’ve successfully created a simple component and applied it to your Vue.js 3 project. You can extend your component by adding more HTML templates, logic, and styles as needed.

Please explain in detail how to use the setup function ChatGPT

In Vue.js 3, when using the Composition API, we can define the logic of the component through functions. A function is a special function that is called before the component is created and rendered to set the initial state of the component, responsive data, computed properties, methods, etc.setupsetup

Here are the detailed steps to use the function:setup

1. Open the component file for which you want to use the function.setup
2. In the component file, locate the label and replace it with the following structure:<script>

vueCopy code<script>
import { ref, reactive, computed, watch } from 'vue';

export default {
  setup() {
    // 在这里定义组件的逻辑
  }
}
</script>

In this example, we imported some commonly used Composition API functions such as , , , and Vue component objects.refreactivecomputedwatch

3. Inside a function, you can define the component’s logic in the following ways:setup

• Use functions to create a single variable data. For example, create a counter named :refcount

javascriptCopy codeconst count = ref(0);

• Use functions to create a responsive object with multiple properties. For example, create a user object named :reactiveuser

javascriptCopy codeconst user = reactive({
  name: 'John',
  age: 30
});

• Use the function to create a computed property. For example, create a computed property named that is twice as large:computeddoubleCountcount

javascriptCopy codeconst doubleCount = computed(() => count.value * 2);

• Use functions to listen for changes in a piece of data. For example, listen for changes and print out the new value in the console:watchcount

javascriptCopy codewatch(count, (newValue) => {
  console.log('count changed:', newValue);
});

4. In a function, you can return an object that contains reactive data, computed properties, methods, and so on, making them available in the component. For example:setup

javascriptCopy codereturn {
  count,
  user,
  doubleCount,
  increment() {
    count.value++;
  }
};

In this example, we returned , , and a method named .countuserdoubleCountincrement

5. In component templates, you can work directly with the reactive data, computed properties, and methods returned in the function. For example:setup

vueCopy code<template>
  <div>
    <p>Count: {{ count }}</p>
    <p>User: {{ user.name }}, {{ user.age }}</p>
    <p>Double Count: {{ doubleCount }}</p>
    <button @click="increment">Increment</button>
  </div>
</template>

In this example, we used , , and the data and methods returned in the function.countuserdoubleCountincrementsetup

With these steps, you can use functions to define the logic of your component. In functions, you can use , , and setupsetuprefreactivecomputed

Please explain in detail how to use ref and reactiveChatGPT

In Vue.js 3, SUM is two commonly used functions for creating reactive data. Here’s a detailed explanation of how to use and:refreactiverefreactive

1. Use to create a single variable data: ref
   • Import function: In the tab of the component file, import the function:ref<script>refimport { ref } from 'vue';
   • Create object: Use a function to create an object and pass in an initial value. For example, create a counter named :refrefrefcountconst count = ref(0);
   • Access and modify values: Use properties to access and modify the values of an object. For example, read value: , modified value:ref.valuerefcountconsole.log(count.value);countcount.value++;
   • Use in templates: In the component’s template, objects can be used directly, just like normal JavaScript variables. For example, the values displayed in the template:refrefcount<p>Count: {{ count }}</p>
2. Use to create a responsive object with multiple properties: reactive
   • Import function: In the tab of the component file, import the function:reactive<script>reactiveimport { reactive } from 'vue';
   • Create Object: Use a function to create an object and pass in a JavaScript object that contains properties. For example, create a user object named :reactivereactivereactiveuserconst user = reactive({ name: 'John', age: 30 });
   • Accessing and modifying the properties of an object: You can access and modify the properties of an object through operators just as you would access and modify the properties of a normal JavaScript object. For example, read properties: , modified properties:reactive.reactiveusernameconsole.log(user.name);userageuser.age = 31;
   • Use objects in templates: In the component’s template, you can use the properties of objects directly, just like normal JavaScript object properties. For example, the name and age that appear in the template:reactivereactiveuser<p>User: {{ user.name }}, {{ user.age }}</p>

Note that when reactive data is used and created, Vue automatically tracks changes to the data and updates it. This means that when you modify the value of an object or object, the related component is automatically updated to reflect the new value.refreactiverefreactive

To summarize, you can create a single mutable piece of data while using to create a responsive object with multiple properties. When working with them, you need to be aware of the syntax differences when accessing and modifying values (using, using) and how you use the data in the template.refreactiveref.valuereactive.

Please explain in detail the use of responsive data and updating ChatGPT

In Vue.js 3, reactive data is a special type of data that automatically updates to reflect the new value when it changes. Here are the steps to explain in detail the use and updating of responsive data:

1. Create responsive data:
   • Use functions to create a single variable data: Use functions to create an object and pass in initial values. For example, create a counter named :refrefrefcountconst count = ref(0);
   • Create a responsive object with multiple properties using a function: Use a function to create an object and pass in a JavaScript object that contains the properties. For example, create a user object named :reactivereactivereactiveuserconst user = reactive({ name: 'John', age: 30 });
2. To access responsive data:
   • refAccess to objects: In objects created with use, you can access and modify their values through properties. For example, read the value:ref.valuecountconsole.log(count.value);
   • reactiveObject access: In objects created with use, properties can be accessed and modified by operators just as they are accessed by normal JavaScript objects. For example, read the property:reactive.usernameconsole.log(user.name);
3. Update responsive data:
   • refUpdates to objects: You can update the value of an object by assigning it directly to its properties. For example, modify the value:ref.valuecountcount.value++;
   • reactiveObject updates: You can modify the properties of an object in the same way as you modify the properties of normal JavaScript objects. For example, modify the properties:.reactiveuserageuser.age = 31;
4. Use reactive data in templates:
   • In the template of the Vue component, reactive data can be used directly. For example, the value displayed in the template: shows name and age:count<p>Count: {{ count }}</p>user<p>User: {{ user.name }}, {{ user.age }}</p>

Note that when you modify responsive data, Vue automatically tracks the changes and updates the relevant components. This means that when you modify the value of an object or object, the related component is automatically updated to reflect the new value.refreactive

In addition, if you want to listen for changes in reactive data in your code, you can use functions to listen for changes in the data and execute the corresponding logic when the changes occur. For example, listen for changes and print new values in the console:watchcount

javascriptCopy codewatch(count, (newValue) => {
  console.log('count changed:', newValue);
});

To summarize, when working with reactive data, you first need to create a reactive data object (using OR), and then you can access and modify its values directly in the component. At the same time, Vue will automatically chaserefreactive

Please explain in detail the use of computed properties and listeners ChatGPT

In Vue.js 3, computed properties and listeners are two important functions for handling and responding to changes in data. Here’s a detailed explanation of compute properties and listeners:

1. Computed Properties:
   • Definition of a computed property: A computed attribute is a type of data that is calculated based on other reactive data. It is a function that is created by a function. For example, create a computed property that is spliced from and : javascriptCopy codecomputedfullNamefirstNamelastNameimport { computed } from 'vue'; const firstName = ref('John'); const lastName = ref('Doe'); const fullName = computed(() => { return `${firstName.value} ${lastName.value}`; });
   • Use of computed properties: In a component’s template, computed properties can be used as if they were normal reactive data. For example, the value displayed: vueCopy codefullName<p>Full Name: {{ fullName }}</p>
   • Caching of computed properties: Computed properties have a caching mechanism that recalculates their values only when their dependencies change. This means that when a computed property is accessed multiple times, the computed property is recalculated only when the relevant reactive data changes.
2. Watchers:
   • Definition of a listener: A listener is a function that listens for changes in specified reactive data. It is created by function. For example, create a listener to listen for changes: javascriptCopy codewatchfirstNameimport { watch } from 'vue'; watch(firstName, (newValue, oldValue) => { console.log(`firstName changed from ${oldValue} to ${newValue}`); });
   • Use of listeners: Listeners listen for specified reactive data and execute logic as the data changes. Data changes can be handled in the listener’s callback function. For example, update in the listener’s callback function: javascriptCopy codefullNamewatch(firstName, (newValue) => { fullName.value = `${newValue} ${lastName.value}`; });
   • Listen for multiple data: In addition to listening for a single piece of data, you can also use functions to listen for changes in multiple reactive data at the same time. For example, listen to and change: javascriptCopy codewatchfirstNamelastNamewatch([firstName, lastName], ([newFirstName, newLastName], [oldFirstName, oldLastName]) => { console.log(`Name changed from ${oldFirstName} ${oldLastName} to ${newFirstName} ${newLastName}`); });
   • Stop listening: Using a function returns a function that stops listening. You can call this function to stop the listener’s execution when you need to stop listening.watch

To sum up, computed properties and listeners are important tools for handling and responding to data changes in Vue.js 3. Computed properties are used to create based on others

Please continue with ChatGPT

Reactive data computed data, which has a caching mechanism that is recalculated only when the relevant reactive data changes. Listeners, on the other hand, listen for changes in specified reactive data and execute logic as the data changes.

Using computed properties and listeners can make the processing of data more flexible and efficient. Computed properties are useful for scenarios that rely on the results computed by other reactive data without the need for manual invocation. Listeners are useful for situations where you need to manually handle data changes, such as asynchronous operations or performing some complex logic when data changes.

It is important to note that both computed properties and listeners are used inside functions. In a component’s function, you can create computed properties and listeners by importing the relevant functions (and ) and define the corresponding logic inside the function.setupsetupcomputedwatch

Summary:

• Computed properties are used to create data that is calculated from other reactive data, with a caching mechanism that is automatically updated.
• Listeners are used to listen for changes in specified reactive data and execute the appropriate logic as the data changes.
• Computed properties are useful for situations that rely on other reactive data calculations, while listeners are useful for scenarios where data changes are handled manually.
• Both computed properties and listeners are used in functions, creating and defining logic by importing related functions (and ).setupcomputedwatch

Please explain in detail the concept of introducing the combination function ChatGPT

In Vue.js 3, a composition function is a concept that combines logically related code into reusable functions. Composition functions can be defined in functions for better code organization and logic reuse.setup

Here’s a detailed explanation of the combined functions:

1. Define the composition function:
   • A composite function is a normal JavaScript function that takes arguments and returns an object that contains reactive data, computed properties, methods, and so on.
   • Composition functions can use the Composition API functions provided by Vue, such as , , , and so on, to process data and logic.refreactivecomputedwatch
   • The return value of a composite function can be used in the function and accessed and called in the component’s template.setup
2. Advantages of combinatorial functions:
   • Code organization: Composite functions allow related logic code to be grouped together, making the code more modular, more readable, and easier to maintain. Code can be split into multiple composition functions based on functionality for better code organization.
   • Logic multiplexing: By abstracting logic code into a combination function, logic multiplexing can be achieved. Different components can use the same combined functions to share logic, reducing the writing of repetitive code.
   • Parameter passing: The combination function can receive parameters and perform different logic processing according to the incoming parameters to achieve more flexible code reuse and customization.
   • Simplifying functions: By placing your logic code in a combination function, you can simplify the function so that it is more focused on the call of the combination function and the configuration of the component.setupsetup
3. To use the combination function:
   • In the function, get the return value of the combined function by calling the combination function and passing in the necessary parameters. For example:setupconst { count, increment } = useCounter(10);
   • In the component’s template, you can directly use the reactive data and methods returned by the composite function. For example:<p>Count: {{ count }}</p><button @click="increment">Increment</button>

By using composite functions, you can better organize and reuse logical code, making code more readable, maintainable, and development efficient.

Summary:

• Composition functions are a concept of combining logically related code into reusable functions.
• Composition functions can be defined in functions and use Vue’s Composition API functions to process data and logic.setup
• The advantages of combining functions include code organization, logic multiplexing, parameter passing, and simplified functions.setup
• Call the composition function in a function and use the reactive data and methods it returns in the template.setup

Please continue with ChatGPT

When using composite functions, there are some considerations and best practices worth considering:

1. Naming conventions: Choose clear and meaningful names for composite functions so that other developers can easily understand their purpose and functionality.
2. Single responsibility principle for composition functions: Design composition functions to have a single responsibility, and each composition function should focus on handling a specific function or logic. This improves the readability and maintenance of the code and makes logic reuse more flexible.
3. Parameter passing: Combination functions can receive parameters, which makes them more versatile and customizable. Be sure to provide the necessary parameters when calling the combined function so that the logic is handled correctly.
4. Processing of reactive data: Composition functions can use functions such as , and so on to create reactive data. Ensure that you use the correct function inside the composition function to process the data so that you get the expected reactive behavior.refreactive
5. Relationship of components to composition functions: Composition functions can be used as part of a component or shared across multiple components. Reuse combined functions across multiple components as needed to reduce code duplication and increase development efficiency.
6. Testing of composite functions: The independence of composite functions makes them easier to unit test. You can write unit tests against composite functions to ensure that they function correctly and meet expected requirements.
7. Size and complexity of composition functions: Depending on the needs of the project and the complexity of the components, composition functions can vary in size and complexity. When writing composite functions, you should choose the appropriate size and complexity for your specific situation to ensure that your code is readable and maintainable.

Summary:

• Combined functions should have a single responsibility, be well-named, and accept parameters as needed.
• Use the right functions to process reactive data to ensure you get the expected reactive behavior.
• Composition functions can be used as part of a component or shared across multiple components.
• Write unit tests to verify the functionality and behavior of the composition function.
• Choose the right size and complexity based on project needs and component complexity.

By following these best practices, you can better use and manage composite functions to improve code quality and development efficiency.

Please explain in detail the creation of custom combination functions in ChatGPT

Creating custom composite functions can help us better organize and reuse logical code. Here are the detailed steps to create a custom combination function:

1. Open your Vue.js 3 project in an appropriate place to create your composition function.
2. Create a new JavaScript file in that location as the file for your custom composition function. For example, named as.useCustomFunction.js
3. In that file, write your custom composition function. A custom composition function should be a normal JavaScript function that can take arguments and return an object with reactive data, computed properties, methods, etc. For example:

javascriptCopy codeimport { ref, computed } from 'vue';

export function useCustomFunction(initialValue) {
  const data = ref(initialValue);

  const double = computed(() => data.value * 2);

  function increment() {
    data.value++;
  }

  return {
    data,
    double,
    increment,
  };
}

In this example, we have created a custom composition function that takes an initial value as a parameter and returns an object that contains, and .useCustomFunctiondatadoubleincrement

4. Use custom composition functions in your Vue components. The custom combination function is called in the function and receives the returned object. For example:setup

javascriptCopy codeimport { useCustomFunction } from './useCustomFunction.js';

export default {
  setup() {
    const { data, double, increment } = useCustomFunction(5);

    return {
      data,
      double,
      increment,
    };
  },
};

In this example, we import a custom combination function and call it in the function to deconstruct the returned data and assign it to a variable.useCustomFunctionsetup

5. In the component’s template, you can directly use the reactive data and methods returned by custom composition functions. For example:

vueCopy code<template>
  <div>
    <p>Data: {{ data }}</p>
    <p>Double: {{ double }}</p>
    <button @click="increment">Increment</button>
  </div>
</template>

In this example, we can use the sum returned by the custom combination function directly in the template.datadoubleincrement

With these steps, you’ll be able to create custom composition functions and use them in your Vue components. This organizes logical code, improves code readability and reusability, and simplifies the component’s functions.setup

Please explain in detail the use of the composition function ChatGPT in the component

In Vue.js 3, use composition functions to combine logically related code into reusable functions and use these combination functions in your components. Here are the detailed steps to use the composite function in a component:

1. Create a combo function: First, create a combo function in your Vue.js 3 project. The composition function is a normal JavaScript function that can use Vue’s Composition API functions such as 、、、 etc. to process data and logic. You can define the required features as needed.refreactivecomputedwatch
2. Import composition functions: Introduce composition functions by importing them in components that require them. Make sure that you import the composition function using statements at the top of the component file. For example:import

javascriptCopy codeimport { useCustomFunction } from '@/path/to/customFunction';

3. Call the composition function in the component’s function: Inside the component’s function, declare a variable with the keyword and call the combination function you imported to get the return value of the combination function. This allows you to use the reactive data, computed properties, and methods provided by the composition functions in your components. For example:setupsetupconst

javascriptCopy codeexport default {
  setup() {
    const { data, double, increment } = useCustomFunction();

    // 在这里可以使用组合函数返回的响应式数据、计算属性和方法

    return {
      data,
      double,
      increment,
    };
  },
};

In this example, we call the composition function and assign the returned reactive data and method destructuring to the , and variables.useCustomFunctiondatadoubleincrement

4. Use the reactive data and methods of the composition function in the template of the component: By using the interpolation syntax in the template of the component, you can directly access and display the reactive data returned by the combination function. At the same time, you can use or directives to listen for and call methods returned by the combined function. For example:{{ }}@v-on

vueCopy code<template>
  <div>
    <p>Data: {{ data }}</p>
    <p>Double: {{ double }}</p>
    <button @click="increment">Increment</button>
  </div>
</template>

In this example, we can use the sum returned by the composite function directly in the template.datadoubleincrement

With the above steps, you can use the composition function in the component. This allows logically related code to be organized and these combined functions reused between different components, improving code readability, maintainability, and reusability.

Please explain in detail the use of lifecycle hooks in the Composition API ChatGPT

In Vue.js 3’s Composition API, using lifecycle hook functions allows us to execute specific logic at different stages of a component. The Composition API provides lifecycle hook functions that correspond to the traditional Options API. Here’s a detailed explanation of using lifecycle hooks in the Composition API:

1. onBeforeMount(before mounting): This hook function is called before the component is mounted to the DOM. In that hook, you can perform some preparatory work or asynchronous operations. For example:

javascriptCopy codeimport { onBeforeMount } from 'vue';

export default {
  setup() {
    onBeforeMount(() => {
      // 在挂载之前执行的逻辑
    });
  },
};

2. onMounted(after mounting): This hook function is called after the component is mounted to the DOM. In this hook, you can perform operations that need to access DOM elements or initialize some data. For example:

javascriptCopy codeimport { onMounted } from 'vue';

export default {
  setup() {
    onMounted(() => {
      // 在挂载之后执行的逻辑
    });
  },
};

3. onBeforeUpdate(before update): This hook function will be called before the component is updated. In this hook, you can perform some logic that needs to be handled before the component is updated. For example:

javascriptCopy codeimport { onBeforeUpdate } from 'vue';

export default {
  setup() {
    onBeforeUpdate(() => {
      // 在更新之前执行的逻辑
    });
  },
};

4. onUpdated(after update): This hook function will be called after the component is updated. In this hook, you can perform some logic that needs to be handled after the component is updated. For example:

javascriptCopy codeimport { onUpdated } from 'vue';

export default {
  setup() {
    onUpdated(() => {
      // 在更新之后执行的逻辑
    });
  },
};

5. onBeforeUnmount(before unloading): This hook function will be called before the component is unloaded. In the hook, you can do some cleanup or unsubscribe. For example:

javascriptCopy codeimport { onBeforeUnmount } from 'vue';

export default {
  setup() {
    onBeforeUnmount(() => {
      // 在卸载之前执行的逻辑
    });
  },
};

6. onUnmounted(after unloading): This hook function will be called after the component is unloaded. In this hook, you can perform some logic that needs to be handled after the component is unloaded. For example:

javascriptCopy codeimport { onUnmounted } from 'vue';

export default {
  setup() {
    onUnmounted(() => {
      // 在卸载之后执行的逻辑
    });
  },
};

These lifecycle hook functions can be used in the component’s functions, along with other Composition API functions. They are offered in different setup

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The ability of a stage to perform specific logic enables you to handle related tasks throughout the component’s lifecycle. It should be noted that when using the Composition API, the naming of lifecycle hook functions has changed, starting with an or, not with an or.onbeforeafter

In addition, the Composition API provides other lifecycle hook functions, such as 、、、, for more fine-grained control and tracking of component lifecycles. These hook functions are used similarly to the hook functions described above, just import and use them in the function.onActivatedonDeactivatedonRenderTrackedonRenderTriggeredsetup

Summary:

• In Vue.js 3’s Composition API, lifecycle hook functions can be used to execute logic for specific stages.
• Lifecycle hook functions include 、、、、、, etc.onBeforeMountonMountedonBeforeUpdateonUpdatedonBeforeUnmountonUnmounted
• These hook functions can be used in the component’s functions, by importing the corresponding functions.setup
• Hook functions provide the ability to execute specific logic at different stages of a component for preparing data, manipulating DOM elements, performing cleanup work, and so on.
• Hook functions are named starting with a different way than in the Options API.on
• The Composition API also provides other lifecycle hook functions, such as 、、、, for more fine-grained control and tracking of component lifecycles.onActivatedonDeactivatedonRenderTrackedonRenderTriggered

By using these lifecycle hook functions, you have more control over the lifecycle of a component and execute the appropriate logic when needed. This provides more flexibility in developing and better code organization.

Please explain in detail how to demonstrate the use of common lifecycle hooks in ChatGPT

In Vue.js 3’s Composition API, common lifecycle hook functions are 、、、、 sums. Here’s a detailed explanation of how these lifecycle hook functions are used:onBeforeMountonMountedonBeforeUpdateonUpdatedonBeforeUnmountonUnmounted

1. onBeforeMount(before mounting):
   • This hook function is called before the component is mounted to the DOM.
   • Use functions in functions to define the appropriate logic.setuponBeforeMount
   • Typically used to perform some preparation work or to do asynchronous operations.
   • For example: javascriptCopy codeimport { onBeforeMount } from 'vue'; export default { setup() { onBeforeMount(() => { // 在挂载之前执行的逻辑 }); }, };
2. onMounted(after mounting):
   • The hook function is called after the component is mounted to the DOM.
   • Use functions in functions to define the appropriate logic.setuponMounted
   • It is often used to perform operations that require access to DOM elements or to initialize some data.
   • For example: javascriptCopy codeimport { onMounted } from 'vue'; export default { setup() { onMounted(() => { // 在挂载之后执行的逻辑 }); }, };
3. onBeforeUpdate(before the update):
   • The hook function is called before the component is updated.
   • Use functions in functions to define the appropriate logic.setuponBeforeUpdate
   • It is often used to perform some logic that needs to be handled before a component is updated.
   • For example: javascriptCopy codeimport { onBeforeUpdate } from 'vue'; export default { setup() { onBeforeUpdate(() => { // 在更新之前执行的逻辑 }); }, };
4. onUpdated(after the update):
   • The hook function is called after the component is updated.
   • Use functions in functions to define the appropriate logic.setuponUpdated
   • Typically used to perform some logic that needs to be handled after a component update.
   • For example: javascriptCopy codeimport { onUpdated } from 'vue'; export default { setup() { onUpdated(() => { // 在更新之后执行的逻辑 }); }, };
5. onBeforeUnmount(before uninstalling):
   • The hook function is called before the component is unloaded.
   • Use functions in functions to define the appropriate logic.setuponBeforeUnmount
   • Typically used to perform some cleanup or unsubscribe operations.
   • For example: javascriptCopy codeimport { onBeforeUnmount } from 'vue'; export default { setup() { onBeforeUnmount(() => { // 在卸载之前执行的逻辑 }); }, }; ``

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6. onUnmounted(after uninstall):
   • The hook function is called after the component is unloaded.
   • Use functions in functions to define the appropriate logic.setuponUnmounted
   • Typically used to perform some logic that needs to be handled after a component is unloaded.
   • For example: javascriptCopy codeimport { onUnmounted } from 'vue'; export default { setup() { onUnmounted(() => { // 在卸载之后执行的逻辑 }); }, };

These are the common ways to use lifecycle hook functions in Vue.js 3’s Composition API. By using these hook functions in functions, you can execute specific logic at different component lifecycle stages. This enables you to perform necessary operations such as data initialization, DOM manipulation, subscription management, cleanup, and so on during the mounting, updating, and unmounting of components.setup

It should be noted that when using the Composition API, the naming of lifecycle hook functions has changed, starting with an or, not with an or. This change is made to better align with other Composition API functions.onbeforeafter

By using these lifecycle hook functions appropriately, you can add and handle logic throughout the lifecycle of a component, enabling more flexible and efficient development.

Please explain in detail the concept of reuse that introduces logic ChatGPT

Logic reuse refers to improving code maintainability, readability and development efficiency by abstracting common logic code and making it reusable in multiple places in software development. The reuse of logic can be achieved in a variety of ways, including functions, classes, components, and modules.

Here’s a detailed explanation of the concept of logic reuse:

1. Function-level reuse: Encapsulate common logic into functions for function-level reuse. Functions can receive parameters and process them differently depending on different inputs. By encapsulating logic into a function, you can call the function in multiple places and avoid writing the same code repeatedly. Function-level reuse provides a simple and flexible way to reuse logic.
2. Class-level reuse: Use the concept of object-oriented programming (OOP) to encapsulate related logic into classes and reuse it by instantiating classes. A class can have properties, methods, constructors, and so on, which can be accessed and called through instances of the class. Class-level reuse can make code more structured and modular, improving code maintainability and extensibility.
3. Component-level reuse: In front-end development, components are an important concept that combines related logic, styles, and templates to form a reusable unit of functionality. Components can receive inputs and provide outputs through parameters and slots, for example. By using components, common UI and logic can be encapsulated, so that they can be reused in different scenarios, improving development efficiency and consistency.
4. Module-level reuse: In software development, a module is a unit that combines related functions and logic. A module can be a file, a library, or a package with independent functionality and boundaries. Module reuse allows logic to be reused in different projects and scenarios by importing and using modules. Module-level reuse can realize modularity and composability of code, and improve code reusability and maintainability.

The reuse of logic helps reduce code redundancy, improve development efficiency, and promote code maintainability and extensibility. By abstracting common logic away and reusing it where needed, we can avoid writing the same code over and over again, while maintaining code consistency and readability. This makes software development more efficient, reliable and sustainable.

Please explain in detail how to create a reusable logical function ChatGPT

Creating reusable logic functions helps us encapsulate common logic code for reuse in multiple places. Here are the steps to demonstrate how to create a reusable logical function:

1. Identify common logic: First, identify the generic logic that you want to encapsulate as a reusable function. This may involve some common operations, calculations, validations, etc.
2. Create a function: Create a new JavaScript function in place and give it a descriptive name to indicate the common logic it performs. Functions can be global or defined in a specific module or class.
3. Define the parameters of the function: Determine which parameters the function needs to receive for logical processing. Parameters can be basic types, objects, functions, etc., defined according to your needs. These parameters can provide the context and input required for the function to execute.
4. Write logic code: Inside the function, write code that performs generic logic. This includes steps such as any manipulation, calculation, or validation. Make sure your code is readable, maintainable, and written according to best practices.
5. Return result: Determine what result the function should return based on the needs of general logic. This can be a value, an object, a boolean, etc., depending on the goals and needs of the logic.
6. Testing and validation: To ensure the correctness and reliability of functions, write corresponding unit test cases, and test and verify functions. This ensures that the function works correctly under different input conditions.
7. Use functions: You can use functions in other code by importing them where they are needed and passing the appropriate parameters. This allows you to encapsulate common logic in functions and avoid repeatedly writing the same code in multiple places.

Here’s an example that shows how to create a reusable logical function:

javascriptCopy code// 通用逻辑：计算两个数字的和
function calculateSum(a, b) {
  return a + b;
}

// 使用函数
const result = calculateSum(5, 3);
console.log(result); // 输出 8

In this example, we have created a function called to calculate the sum of two numbers. By passing different parameters, we can reuse this function where needed and get the correct calculation result.calculateSum

By following these steps to create reusable logic functions, you can improve the maintainability and reusability of your code. This avoids writing the same code in multiple places, improves development efficiency, and ensures code consistency and readability.

Please explain in detail the reuse of logical functions in different components ChatGPT

Reusing logical functions in different components is achieved by encapsulating common logic code as functions and importing and using those functions in the components that are needed. Here are the detailed steps to reuse logical functions in different components:

1. Create a logical function: First, encapsulate the generic logic code as a function. This function can be a standalone module or file, or a function defined in a specific component. Ensure that the naming of logical functions is descriptive and clearly expresses their function.
2. Import logical functions: Introduce logical functions by importing logical functions in components that require them. Use statements at the top of the component file to import logical functions. Be sure to provide the correct path and name for the logical function.import
3. Use logical functions: In the component’s function, call the imported logical function and save its result to a variable. This allows you to use the functionality provided by logical functions in your components. Use these functions in templates, computed properties, methods, and more.setup
4. Pass parameters: Determine whether you need to pass parameters to the logical function according to the needs of the logical function. Parameters can be data in components, props, events, and so on. Make sure that you pass the correct parameters when calling the logical function so that the function works correctly.

Here’s an example that shows how to reuse a logical function in different components:

javascriptCopy code// 逻辑函数：计算两个数字的和
export function calculateSum(a, b) {
  return a + b;
}

In component A:

javascriptCopy codeimport { calculateSum } from '@/path/to/logicFunctions';

export default {
  setup() {
    const result = calculateSum(5, 3);
    // 使用逻辑函数的结果进行操作
    // ...
  },
};

In component B:

javascriptCopy codeimport { calculateSum } from '@/path/to/logicFunctions';

export default {
  setup() {
    const result = calculateSum(10, 7);
    // 使用逻辑函数的结果进行操作
    // ...
  },
};

In this example, we create a logical function called it and export it for use by other components. In component A and component B, we import and use this logical function, pass different parameters, and operate with the return value of the function.calculateSum

In this way, you can reuse logical functions in different components and avoid writing the same logic code repeatedly in each component. This improves code reusability, maintainability, and readability, and improves development efficiency. At the same time, the independence of logical functions makes them easier to unit test, guaranteeing the correctness of their functionality and behavior.

Please explain in detail the several ways in which ChatGPT communicates between components

In Vue .js, inter-component communication is very important, allowing different components to share data, pass information, and coordinate operations. Here’s a detailed explanation of several common inter-component communication methods:

1. Props and Events (parent-child component communication): Data is passed to child components through props in parent components, and child components can receive and use this data through props. The parent component can listen to the events of the child component and perform corresponding actions through the v-on directive. This approach is suitable for one-way communication between parent and child components.
2. Custom events (child components communicating with parent components): The child component can trigger custom events through the $emit method and pass the data that needs to be passed as parameters to the parent component. The parent component can listen to the custom events of the child component through the v-on directive and perform corresponding operations. This is useful for a child component that passes data to a parent component or triggers a specific action of the parent component.
3. EventBus (non-parent-child component communication): EventBus is a central event bus that allows different components to communicate through the publication and subscription of events by creating a global Vue instance as an event hub. Components can publish events through the $emit method, while other components can subscribe to events and perform corresponding actions through the $on method. EventBus can be used anywhere in the application, but care needs to be taken to manage event naming and destruction.
4. Vuex (Global State Management): Vuex is a state management library officially provided by Vue .js to manage the global state of applications. Access and update shared state in different components by defining state and action functions. Components can trigger action functions through the dispatch method, and action functions can update the state through the commit method. This approach is suitable for complex applications that need to share and synchronize state across multiple components.
5. Provide and Inject (ancestor communication to descendant components): Ancestor components can provide data through the provide option, and then inject this data using the inject option in descendant components. In this way, data can be passed to descendant components throughout the component tree, no matter how deep the hierarchy is. This approach is appropriate for ancestor components to provide data or functionality to descendant components.
6. $refs (direct access to subcomponents by reference): You can use the ref attribute in a component to add a reference to a subcomponent. The $refs object allows you to access child component instances directly and call the subcomponent’s methods or access the subcomponent’s properties. This is useful when a specific child component is manipulated directly within a parent component.

Depending on the needs of the application and the relationship between components, it is important to choose the appropriate method of communication between components. Proper use of these communication methods can effectively manage and maintain relationships between components and improve code readability, maintainability, and reusability.

Please explain in detail how to implement inter-component communication in the Composition API in ChatGPT

In Vue.js 3’s Composition API, there are techniques that can be used to enable communication between components. Here are some examples that demonstrate how to implement intercomponent communication in the Composition API:

1. Props and Events (parent-child component communication):
   • The parent component passes data to the child component through props.
   • The subcomponent uses options to declare the properties it receives.props
   • Child components can trigger events through methods, and parent components can listen for events and perform corresponding actions through instructions.$emitv-on
   • Sample code: javascriptCopy code// 父组件 <template> <child-component :message="parentMessage" @custom-event="handleEvent"></child-component> </template> <script> import ChildComponent from '@/components/ChildComponent.vue'; export default { components: { ChildComponent, }, data() { return { parentMessage: 'Hello from parent', }; }, methods: { handleEvent(payload) { // 处理子组件触发的事件 }, }, }; </script> // 子组件 <template> <div> <p>{{ message }}</p> <button @click="$emit('custom-event', 'Data from child')">Trigger Event</button> </div> </template> <script> export default { props: { message: String, }, }; </script>
2. Provide and Inject (ancestor communicates to descendant component):
   • Ancestor components provide data through options.provide
   • The descendant component uses options to inject data.inject
   • Sample code: javascriptCopy code// 祖先组件 <template> <child-component></child-component> </template> <script> import { provide } from 'vue'; export default { setup() { const sharedData = 'Shared data from ancestor'; provide('sharedData', sharedData); }, }; </script> // 后代组件 <template> <div> <p>{{ injectedData }}</p> </div> </template> <script> import { inject } from 'vue'; export default { setup() { const injectedData = inject('sharedData'); return { injectedData, }; }, }; </script>
3. EventBus：
   • Create an event bus instance, which can be a Vue instance.
   • Use methods to subscribe to events in components that need to communicate, and use methods to trigger events.$on$emit
   • Sample code: javascriptCopy codejavascriptCopy codejavascriptCopy code// Event Bus import { createApp } from 'vue'; const app = createApp({}); const eventBus = app.config.globalProperties.$eventBus = app.config.globalProperties.$eventBus || app; export default eventBus; // 发布事件 import eventBus from '@/path/to/eventBus'; eventBus.$emit('custom-event', payload); // 订阅事件 import eventBus from '@/path/to/eventBus'; eventBus.$on('

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‘custom-event’, payload => { // handle event }); “`

4. Vuex (Global State Management):
   • Define the shared state and action functions in a file.store
   • Use functions in components to access instances, and use the provided methods to get and update status.useStorestorestore
   • Sample code: javascriptCopy codejavascriptCopy code// store.js import { createStore } from 'vuex'; const store = createStore({ state: { message: 'Shared message', }, mutations: { updateMessage(state, payload) { state.message = payload; }, }, }); export default store; // 组件中使用 import { useStore } from 'vuex'; export default { setup() { const store = useStore(); const message = store.state.message; store.commit('updateMessage', 'New message'); }, };

These are a few ways to implement inter-component communication in Vue.js 3’s Composition API. According to the needs of the application and the relationship between components, choose the appropriate communication method to achieve data sharing, messaging, and coordination between components. These approaches provide flexible and powerful tools for communicating between components at different levels and relationships.

Please explain in detail creating a more complex example project that shows how to use the Composition API to solve a real-world problem with ChatGPT

When using the Composition API to solve real-world problems, a complex sample project can be a simple to-do application. In this example project, we’ll use the Composition API to manage the to-do list and show how to solve real-world problems using different Composition API functions.

Here’s a detailed explanation of the sample project for creating a to-do app:

1. Create the project structure:
   • Create a Vue .js project, either using the Vue CLI or manually.
   • Create a component folder in your project to hold the component files.
   • Create a data folder in your project to hold data and logically related files.
2. To create a component:
   • Create a component that displays the to-do list.TodoList
   • Create a component that showcases a single to-do item.TodoItem
   • Create a component to add a new to-do item.AddTodo
3. Data Management:
   • Create a file in the data folder to hold the to-do data and related logic.todos.js
   • Use the function to create a responsive array for storing to-do items.reactivetodos
   • Use the function to create a variable of reference type that stores the contents of the new to-do item.refnewTodo
4. Logical processing:
   • In the file, create a function that adds a new to-do item to the array.todos.jsaddTodotodos
   • Use the function to create a calculated property that filters for completed to-dos.computedcompletedTodos
   • Create a function that toggles the completion status of a to-do item.toggleTodo
5. To use the Composition API in a component:
   • Use functions in components, import and .TodoListsetuptodoscompletedTodos
   • Traverse the array in the component, render the component, and pass the appropriate properties and events.TodoListtodosTodoItem
   • Use functions in components, import and .AddTodosetupnewTodoaddTodo
   • Use directives to bind the value of the input box to and call the function when the button is clicked.v-modelnewTodoaddTodo
6. Introduce and use the required Composition API functions in various components, such as , , , etc.reactiverefcomputed

With this sample project, we show how to solve a real-world problem using the Composition API. Using the Composition API can better organize your code and improve its readability, maintainability, and reusability. In this example, we manage the data, logic, and state of the backlog by using different Composition API functions, and use these functions in various components to communicate and interact with each other.

Note that the above sample project is a simplified example and may involve more features and complexes in real-world applications

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Heterogeneous. However, with this example, you can learn how to use the basic concepts and functions of the Composition API to solve real-world problems.

In addition to the above examples, there are many other practical problems that can be solved using the Composition API, such as:

1. Form validation: Use the ampersand function in the Composition API to validate form input in real time and display error messages.refwatch
2. Asynchronous requests: Use the AND functions in the Composition API to manage the state and data of asynchronous requests, and use functions to monitor changes in data.refreactivewatch
3. Route management: Use the ampersand function in the Composition API to manage route status and use functions to listen for route changes.refreactivewatch
4. Global state management: Use the ampersand/or functions in the Composition API to manage the global state of your application.reactiveprovideinject
5. Calculated properties: Use functions in the Composition API to create calculated properties and automatically update calculation results based on changes in other responsive data.computed
6. Animation effects: Use the AND function in the Composition API to monitor data changes, and use Vue’s transition and animation features to achieve various animation effects.refwatch

In summary, the Composition API provides a powerful toolset that helps us better organize, manage, and reuse code to solve real-world problems. By making proper use of various functions and concepts of the Composition API, the readability, maintainability, and reusability of code can be improved, while improving development efficiency and application performance.

Please explain in detail some best practices for using the Composition API ChatGPT

When using the Composition API, here are some best practices and recommendations to help you take better advantage of the feature:

1. Organize code logic: Organize related logic codes based on function and responsibility. Code can be split into multiple logical functions according to functional modules or business logic to improve the readability and maintainability of code.
2. Single responsibility principle: limit each logical function to a specific functional scope and ensure that it focuses only on its own responsibilities. This helps with code decoupling and unit testing, and makes logical functions more reusable.
3. Fair use of reactive data: Use functions and functions to declare reactive data. Suitable for single basic types of data, but suitable for objects and complex data structures. When working with reactive data, avoid modifying them directly, and instead use the appropriate APIs such as or to access and modify them.refreactiverefreactiveref.valuereactive.value
4. Use of computed properties and listeners: By using functions to create computed properties, you can avoid frequent calculations in your template. Use functions to listen for changes in data and perform appropriate actions when data changes. This reduces unnecessary double calculations and logical processing.computedwatch
5. Fair use of lifecycle hooks: When using the Composition API, the naming of lifecycle hook functions has changed. Use 、、、、 and isohook functions at the right time to perform the appropriate operation. Ensure that the necessary logic is executed in the correct lifecycle phase.onBeforeMountonMountedonBeforeUpdateonUpdatedonBeforeUnmountonUnmounted
6. Selection of communication between components: According to the relationship and needs between components, select the appropriate communication method. For communication between parent and child components, props and events mechanisms are used. For communication between non-parent-child components, you can use EventBus, provide/inject, or Vuex.
7. Creation of custom composition functions: Encapsulate a set of related logic into custom composition functions, providing a higher level of abstraction and reusability. Hide specific implementation details in composition functions so that they can be reused across different components.
8. Modularity and reusability: Use the idea of modularity to organize code, encapsulating related logic and functionality into independent modules or components. Through reasonable module division and communication between modules, improve code reusability and maintainability.
9. Unit tests: When writing a logical function, write the appropriate unit test cases to verify the correctness of its functionality and behavior. Use testing tools like Vue Test Utils

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Perform unit tests and ensure that logical functions work correctly in different situations.

10. Comments and documentation: Add clear comments to logical functions and components to explain the intent, functionality, and usage of the code. Write good documentation that records the usage, parameters, return values, and more of logical functions and components so that other developers can understand and use them.
11. Use TypeScript: If possible, use TypeScript to increase the type safety and readability of your code. Add type annotations to logical functions and components, and define the data types of inputs and outputs to catch potential errors during development.
12. Understand the benefits of the Composition API: The Composition API provides developers with a more flexible, composable, and reusable way to manage code logic. Understanding its advantages, such as more intuitive logic organization, better code reuse, and greater development efficiency, can help you better apply the Composition API to solve real-world problems.

These are some best practices and recommendations for using the Composition API. By following these practices, you can better utilize the capabilities of the Composition API, improve the quality, readability, and maintainability of your code, and improve development efficiency. Different projects and scenarios may have different requirements, so adapt and adapt to the actual situation.

Please answer some frequently asked questions and doubts about ChatGPT

Of course, what are your common questions or doubts? I will try to answer.

Please explain in detail the main features and usage of Composition API ChatGPT

The Composition API is a new API introduced in Vue.js 3 that aims to provide a more flexible, composable, and reusable way to organize and manage the code logic of Vue components. Here’s a detailed explanation of the key features and usage of the Composition API:

1. More intuitive logical organization: The Composition API makes code more intuitive and easy to understand by organizing related logic code together. Instead of writing code in a fragmented order of lifecycle hooks, logic is organized by function or responsibility, making code more modular and readable.
2. Better code reuse: The Composition API provides a higher level of abstraction and code reusability by customizing composition functions. A set of related logic can be encapsulated into a custom composition function and reused where needed. This avoids repeated writing of code and improves code reusability and maintainability.
3. Greater development efficiency: The Composition API provides a concise and powerful set of functions, such as 、、、, for managing state, reactive data, computational properties, side effects, and more. These functions have a simple API and clear semantics, which can improve development efficiency and reduce the writing of boilerplate code.reactiverefcomputedwatch
4. Better type inference and type safety: Combined with TypeScript, the Composition API can provide better type inference and type safety. By adding type annotations to logical functions and components, defining the data types of inputs and outputs, you can catch potential type errors at compile time, improving the reliability and maintainability of your code.
5. Better testability: The Composition API provides an easier way to organize code for testing. By abstracting logic into independent functions and testing it as a unit, you can more easily write and run unit tests for specific logic. This makes it easier and more reliable to write and maintain test code.

In summary, the Composition API is a powerful feature in Vue.js 3 that provides a more flexible, composable, and reusable way to organize and manage the code logic of Vue components. Through intuitive logic organization, code reuse, efficient development methods, and better testing, code readability, maintainability, and development efficiency can be improved. Using the Composition API can make Vue.js applications more structured, extensible, and reliable.

Please explain in detail why the Composition API is an important feature in Vue.js 3 ChatGPT

The Composition API is an important feature in Vue.js 3, and here is a detailed explanation of why the Composition API is so important in Vue.js 3:

1. More flexible code organization: The Composition API provides a more intuitive and flexible way to organize and manage the code logic of Vue components. Traditional Options APIs split code into lifecycle hooks, making it difficult to understand and maintain logic in large components. The Composition API allows related logic code to be organized together, which is more in line with the developer’s way of thinking, making the code easier to read, understand, and maintain.
2. Better code reuse: The Composition API provides a higher level of abstraction and code reusability by customizing composition functions. Developers can encapsulate a set of related logic into a custom composition function and then reuse it in different components. This modular approach makes code reuse easier, avoids repeatedly writing the same code in different components, and improves code maintainability and extensibility.
3. Higher development efficiency: The Composition API simplifies the writing and maintenance of code, improving development efficiency. It provides a concise yet powerful set of functions such as 、、、 for managing state, reactive data, computed properties, side effects, and more. These functions have a simple API and clear semantics to write high-quality code faster and less boilerplate code.reactiverefcomputedwatch
4. Better type inference and type safety: Combined with TypeScript, the Composition API can provide better type inference and type safety. By adding type annotations to logical functions and components, defining the data types of inputs and outputs, you can catch potential type errors at compile time, improving the reliability and maintainability of your code. This is especially important for large projects and team collaboration, providing better code intelligence and error detection.
5. Better testability: The Composition API makes code easier to test. By abstracting logic into independent functions and testing it as a unit, you can more easily write and run unit tests for specific logic. This allows problems to be found and fixed earlier, improving the quality and reliability of the code, while also reducing overall application risk.

In summary, the Composition API is an important feature in Vue.js 3, which provides a more flexible, composable, and reusable way to organize and manage the code logic of Vue components. It makes the code easier to read, easier to maintain, and improves development efficiency

Please continue with ChatGPT

Rate and code reuse. By simplifying the process of writing and maintaining code, providing better type inference and type safety, and making unit testing easier, the Composition API makes developing Vue.js applications more efficient, reliable, and scalable. It helps developers better organize and manage code, improve team collaboration, and provide better tools and ways to build complex applications. Therefore, the Composition API is considered an important feature in Vue.js 3, providing developers with a better development experience and more powerful tools to build great Vue .js applications.