Getting Started with Vue 3 in Vue Dropdown Tree component

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21 Oct 2021 / 4 minutes to read

This section explains how to use Dropdown Tree component in Vue 3 application.

Prerequisites

vue : 3+
node : 10.15+
vue-class-component : 8.0.0-rc.1

Creating Vue application using Vue CLI

The easiest way to create a Vue application is to use the Vue CLI. Vue CLI versions above 4.5.0 are mandatory for creating applications using Vue 3. Use the following command to uninstall older versions of the Vue CLI.

npm uninstall vue-cli -g

Use the following commands to install the latest version of Vue CLI.

npm install -g @vue/cli
npm install -g @vue/cli-init

Create a new project using the command below.

vue create quickstart

Initiating a new project prompts us to choose the type of project to be used for the current application. Select the option Default (Vue 3 Preview) from the menu.

Reference

Syncfusion Vue packages are maintained in the npmjs.com registry. The Dropdown Tree component will be used in this example. To install it use the following command.

npm install @syncfusion/ej2-vue-dropdowns --save

Import the needed CSS styles for the Dropdown Tree component along with dependency styles in the <style> section of the src/App.vue file as follows.

<style>
@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-inputs/styles/material.css";
@import "../node_modules/@syncfusion/ej2-navigations/styles/material.css";
@import "../node_modules/@syncfusion/ej2-vue-dropdowns/styles/material.css";
</style>

Note: Dropdown Tree component use other Syncfusion components too, the dependent component’s CSS references need to be added for using all the Dropdown Tree functionalities.

You have completed all the necessary configurations needed for rendering the Syncfusion Vue component. Now, you are going to add the Dropdown Tree component using following steps.

Import the Dropdown Tree component in the <script> section of the src/App.vue file.

 <script>
 import { DropDownTreeComponent } from '@syncfusion/ej2-vue-dropdowns';
 </script>

 import { DropDownTreeComponent } from '@syncfusion/ej2-vue-dropdowns';
 //Component registeration
 export default {
     name: "App",
     components: {
       'ejs-dropdowntree' : DropDownTreeComponent
     }
 }

In the above code snippet, you have registered Dropdown Tree component.

Add the component definition in template section.

 <template>
     <ejs-dropdowntree id='dropdowntree' :fields='fields'></ejs-dropdowntree>
 </template>

Above is the Dropdown Tree component definition, with fields property binding definition.

Declare the bound properties in the script section. Declare the collection data which is bound for the fields property.

 var data =  [
 {
     nodeId: '01', nodeText: 'Music',
     nodeChild: [
         { nodeId: '01-01', nodeText: 'Gouttes.mp3' }
     ]
 },
 {
     nodeId: '02', nodeText: 'Videos', expanded: true,
     nodeChild: [
         { nodeId: '02-01', nodeText: 'Naturals.mp4' },
         { nodeId: '02-02', nodeText: 'Wild.mpeg' },
     ]
 },
 {
     nodeId: '03', nodeText: 'Documents',
     nodeChild: [
         { nodeId: '03-01', nodeText: 'Environment Pollution.docx' },
         { nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx' },
         { nodeId: '03-03', nodeText: 'Global Warming.ppt' },
         { nodeId: '03-04', nodeText: 'Social Network.pdf' },
         { nodeId: '03-05', nodeText: 'Youth Empowerment.pdf' },
     ]
 }];
 export default {
   name: 'App',
   components: {
     'ejs-dropdowntree' : DropDownTreeComponent
   },
   data() {
     return {
       fields: { dataSource: data, value: 'nodeId', text: 'nodeText', child: 'nodeChild' }
     };
   },
 };

Summarizing the above steps, update the src/App.vue file with following code.

 <template>
   <ejs-dropdowntree id='dropdowntree' :fields='fields'></ejs-dropdowntree>
 </template>
 <script>
 import { DropDownTreeComponent } from '@syncfusion/ej2-vue-dropdowns';

 var data =  [
   {
       nodeId: '01', nodeText: 'Music',
       nodeChild: [
           { nodeId: '01-01', nodeText: 'Gouttes.mp3' }
       ]
   },
   {
       nodeId: '02', nodeText: 'Videos', expanded: true,
       nodeChild: [
           { nodeId: '02-01', nodeText: 'Naturals.mp4' },
           { nodeId: '02-02', nodeText: 'Wild.mpeg' },
       ]
   },
   {
       nodeId: '03', nodeText: 'Documents',
       nodeChild: [
           { nodeId: '03-01', nodeText: 'Environment Pollution.docx' },
           { nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx' },
           { nodeId: '03-03', nodeText: 'Global Warming.ppt' },
           { nodeId: '03-04', nodeText: 'Social Network.pdf' },
           { nodeId: '03-05', nodeText: 'Youth Empowerment.pdf' },
       ]
   }
 ];
 export default {
   name: 'App',
   components: {
     'ejs-dropdowntree' : DropDownTreeComponent
   },
   data() {
     return {
       fields: { dataSource: data, value: 'nodeId', text: 'nodeText', child: 'nodeChild' }
     };
   },
 };
 </script>
 <style>
   @import "../node_modules/@syncfusion/ej2-base/styles/material.css";
   @import "../node_modules/@syncfusion/ej2-inputs/styles/material.css";
   @import "../node_modules/@syncfusion/ej2-navigations/styles/material.css";
   @import "../node_modules/@syncfusion/ej2-vue-dropdowns/styles/material.css";
 </style>