How to reference encapsulated components in vue

With the continuous development of front-end frameworks, more and more developers are beginning to use Vue.js to build web applications. In Vue.js, components are one of the core concepts for building web applications. Vue.js components make code more modular, reusable, easier to maintain, and easier to test. Encapsulating components is one of the important features of Vue.js. It can encapsulate reusable code and state into a separate module, which is called a component, so that it can be reused in different parts of the program. This article explains how to reference encapsulated components.

1. Create component

First, we need to create a Vue component. Before creating a component, we need to determine the component's name, properties, methods, etc. In this article, we take a simple button component as an example to demonstrate how to reference encapsulated components. This button component has two properties: btnClass and btnText. btnClass is used to specify the class name of the button, and btnText is used to specify the text content of the button. Here is the sample code for the button component:

<template>
  <button :class="btnClass">{{ btnText }}</button>
</template>

<script>
export default {
  name: 'MyButton',
  props: {
    btnClass: {
      type: String,
      default: '',
    },
    btnText: {
      type: String,
      default: '',
    },
  },
};
</script>

2. Register the component as global component

To use the component anywhere in the application, we need to register the component as global components. This way the component can be referenced anywhere. In files that need to use components, just use the component name in the template. To register a component as a global component just use the Vue.component() method. The following is sample code:

import Vue from 'vue';
import MyButton from './components/MyButton.vue';

Vue.component('MyButton', MyButton);

When registering a component, we need to declare the name of the component and the path to the component file.

3. Register a component as a local component

Unlike global components, local components can only be used in the registration location and its subcomponents. This approach is suitable when you need to use the same component in multiple child components with the same parent component. In the following sample code, we register the component as a local component:

<template>
  <div>
    <MyButton btnClass="primary" btnText="Click me"></MyButton>
  </div>
</template>

<script>
import MyButton from './MyButton.vue';

export default {
  name: 'MyView',
  components: { MyButton },
};
</script>

When registering a local component, you need to declare the component in the components option of the component where the component is registered.

4. Introducing external components

We place the component files in the components directory, and then introduce the components in the files that need to use the components (such as App.vue). When we need to use this component, we just use it in the template. As shown below:

import MyButton from './components/MyButton.vue';

export default {
  name: 'App',
  components: {
    MyButton,
  },
};

Of course there are other ways to reference components, such as: using the import() function to dynamically load components, or using the Vue.component() method to add components, etc. Choose the most appropriate method according to the actual situation.

Summary

Vue.js is a powerful front-end framework, and its component system is one of the core concepts for building web applications. Vue.js' encapsulated components can make code more modular, reusable, easier to maintain and test. To reference a component in an application, we need to register a name for the component and then introduce it in the file that needs to use the component. Make our code more modular and reusable, thereby reducing code redundancy. I hope this article was helpful and made you more proficient in using Vue.js components.

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