VUE3 development basics: Use Vue.js plug-in to encapsulate the folding panel component

VUE3 Development Basics: Use the Vue.js plug-in to encapsulate the folding panel component

The folding panel is a common UI component that can be used to expand and collapse content. In Vue.js, we can use directives or components to implement accordion panels. However, developing duplicate components is a tedious task, so using the Vue.js plug-in to encapsulate the accordion panel component is a better solution.

This article will introduce how to use the Vue.js plug-in to encapsulate the folding panel component, including the installation, use and configuration of the plug-in. We use Vue3 as the development environment and use Vite as the build tool.

Step 1: Create Project and Install Vue.js

First, we need to create a new Vue.js project, enter the following command:

npm init vite-app vue3-fold-panel

This will create a Create a new Vite project and name it "vue3-fold-panel".

Next, we need to install Vue.js. You can use the following command to install:

npm install vue@next

After the installation is complete, we can create a new Vue instance in the project:

import { createApp } from 'vue'
import App from './App.vue'

createApp(App).mount('#app')

Step 2: Write the folding panel component

Before we start packaging the accordion component, we need to define it first. Create a new folder in the src/components directory and name it "FoldPanel". In the folder, create a file named "FoldPanel.vue" and write the following code:

<template>
  <div class="fold-panel">
    <div class="fold-panel-header" @click="togglePanel"> {{ title }} </div>
    <div class="fold-panel-body" v-show="showPanel">
      <slot></slot>
    </div>
  </div>
</template>

<script>
export default {
  name: 'FoldPanel',
  data() {
    return {
      showPanel: false,
    }
  },
  props: {
    title: {
      type: String,
      required: true,
    },
  },
  methods: {
    togglePanel() {
      this.showPanel = !this.showPanel
    },
  },
}
</script>

<style scoped>
.fold-panel {
  border: 1px solid #ddd;
  margin-bottom: 10px;
}

.fold-panel-header {
  padding: 10px;
  cursor: pointer;
}

.fold-panel-body {
  padding: 10px;
}
</style>

In this component, we use the new feature "" in Vue3, It allows us to insert content inside components. The accordion component consists of two parts: title and content. When the user clicks on the title, the content section can be collapsed or expanded.

We define a method called "togglePanel" to switch the expanded or collapsed state of the content part. We also define a "showPanel" variable that records whether the content part should be displayed.

Step 3: Create a plugin and register the component

Next, we will create a plugin that will register our accordion component globally.

In the src/plugins directory, create a file named "fold-panel.js", and then write the following code:

import FoldPanel from '../components/FoldPanel/FoldPanel.vue'

export default {
  install(app) {
    app.component(FoldPanel.name, FoldPanel)
  },
  FoldPanel,
}

This plug-in only contains a method to globally register the folding panel . We use the "app.component" function to register the component into the Vue instance. The plugin also returns an object named "FoldPanel", which allows us to import the component using "import { FoldPanel } from 'fold-panel'" in the component.

Step 4: Install the plugin into Vue.js

Now, we can install the plugin into our Vue.js application. Open the src/main.js file and use the following code to install the plugin:

import { createApp } from 'vue'
import App from './App.vue'
import FoldPanelPlugin from './plugins/fold-panel'

const app = createApp(App)

app.use(FoldPanelPlugin)

app.mount('#app')

Note that we used Vue.js 3’s new API “app.use” to install the plugin.

Step 5: Use the accordion panel component

Now, we can use our accordion panel component in any Vue component. Simply insert the following code into your template:

<template>
  <div>
    <fold-panel title="折叠面板1">
      这是折叠面板1的内容。
    </fold-panel>

    <fold-panel title="折叠面板2">
      这是折叠面板2的内容。
    </fold-panel>
  </div>
</template>

<script>
import { FoldPanel } from 'fold-panel'

export default {
  components: {
    FoldPanel,
  },
}
</script>

This will display two accordion panels on the page, each with a title and content section. When the user clicks on the panel title, the content section expands or collapses.

Step 6: Configure the component

Our collapsible panel component can also be customized through properties. Here are some main properties:

1. title: Collapse Panel title.
2. isCollapsed: Specifies whether the folding panel is initially collapsed, the default is false (i.e. expanded state).

<template>
  <div>
    <fold-panel title="折叠面板1" :isCollapsed="true">
      这是折叠面板1的内容。
    </fold-panel>

    <fold-panel title="折叠面板2">
      这是折叠面板2的内容。
    </fold-panel>
  </div>
</template>

In this example, "Collapse Panel 1" will initially be collapsed. We can set this property through the template during initialization.

3. showIcon: Specify whether to display the expand/collapse icon. Default is true.

<template>
  <div>
    <fold-panel title="折叠面板1" :showIcon="false">
      这是折叠面板1的内容。
    </fold-panel>

    <fold-panel title="折叠面板2">
      这是折叠面板2的内容。
    </fold-panel>
  </div>
</template>

In this example, "Collapse Panel 1" will not display the expand/collapse icon.

4. iconPosition: Specify the position of the expand/collapse icon. The default is "left", which is the left side.

<template>
  <div>
    <fold-panel title="折叠面板1" iconPosition="right">
      这是折叠面板1的内容。
    </fold-panel>

    <fold-panel title="折叠面板2">
      这是折叠面板2的内容。
    </fold-panel>
  </div>
</template>

In this example, the expand/collapse icon of "Collapse Panel 1" will be displayed on the right.

At this point, our folding panel component has been encapsulated. Using Vue.js plugins to encapsulate components not only reduces duplicate code, but also makes the code more modular and extensible.

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