The use of Vue.component function and how to create local components

Vue.js is a progressive JavaScript framework for building user interfaces. It not only provides many powerful functions, but also helps us better organize and manage our code.

Vue.component is a very useful function in Vue.js, which can be used to create global components or local components. In this post, we will focus on how to create partial components using the Vue.component function.

In Vue.js, components are reusable blocks of code that encapsulate HTML, CSS, and JavaScript to achieve specific functionality. The Vue.component function is used to create Vue components. Let's look at an example:

// 创建一个名为 'my-component' 的全局组件
Vue.component('my-component', {
  template: '<div>这是我的组件</div>'
})

In the above example, we created a global component called 'my-component' via the Vue.component function. The component contains a simple div element and contains the text "This is my component".

Global components are available throughout the entire Vue application. Just call Vue.component in your main Vue instance. However, global components are not always needed, especially for large projects.

Let's see an example of creating a partial component:

var app = new Vue({
  el: '#app',
  components: {
    'my-component': {
      template: '<div>这是我的组件</div>'
    }
  }
})

In the example above, we created a partial component called 'my-component' and added it to the Vue instance's component options. In this way, this component can be used in the DOM element whose el is '#app'.

<div id="app">
  <my-component></my-component>
</div>

The above is a simple HTML structure where we have used the 'my-component' component. This component will be rendered by the Vue instance into the DOM element with id 'app'.

The benefit of local components is that they can only be used inside the Vue instance in which they are defined, which avoids global naming conflicts and improves the maintainability and reusability of components.

In addition to basic HTML templates, we can use partial components to pass data, listen to events, and share data between components. Let's look at a more complex example:

Vue.component('child-component', {
  props: ['message'],
  template: '<div>{
   
   { message }}</div>'
})

var app = new Vue({
  el: '#app',
  data: {
    parentMessage: '这是父组件的消息'
  },
  template: `
    <div>
      <child-component :message="parentMessage"></child-component>
    </div>
  `
})

In the above example, we created a partial component named 'child-component' and added a props property named 'message' to it. We also define a data property called 'parentMessage' which is bound to the 'message' property of the 'child-component' component.

<div id="app">
  <!-- 组件会渲染为：<div>这是父组件的消息</div> -->
  <child-component :message="parentMessage"></child-component>
</div>

In the HTML template of the parent component, we pass the data by using the 'child-component' component with the 'parentMessage' property as the value of the 'message' property. Eventually, the 'child-component' will be rendered as a div element displaying the parent component's message.

By creating partial components through the Vue.component function, we can better organize and manage our code, and improve code reusability and maintainability. Whether creating simple or complex components, Vue.component can meet our needs.

I hope this article helps you understand the use of Vue.component functions and how to create partial components. Wishing you a happy coding experience with Vue.js!

The use of Vue.component function and how to create local components

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