Set tooltip for tree nodes in Angular TreeView component

7 Jan 202514 minutes to read

TreeView component allows you to set a tooltip for tree nodes using the tooltip property. The following code example demonstrates how to set a tooltip for TreeView nodes.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { FormsModule } from '@angular/forms'
import { TreeViewModule } from '@syncfusion/ej2-angular-navigations'
import { Component, Inject, ViewChild } from '@angular/core';
import { TreeViewComponent } from '@syncfusion/ej2-angular-navigations';
/**
 * TreeView tooltip sample
 */
@Component({
    imports: [
        FormsModule, TreeViewModule
    ],
    standalone: true,
    selector: 'app-container',
    template: `<div id='treeparent'><ejs-treeview [fields]='field'></ejs-treeview></div>`
})
export class AppComponent {
    // Data source for TreeView component
    public hierarchicalData: Object[] = [
        {
            id: '01', name: 'Local Disk (C:)', expanded: true, tooltip: 'Local Disk (C:)',
            subChild: [
                {
                    id: '01-01', name: 'Program Files', tooltip: 'Program Files',
                    subChild: [
                        { id: '01-01-01', name: 'Windows NT', tooltip: 'Windows NT' },
                        { id: '01-01-02', name: 'Windows Mail', tooltip: 'Windows Mail' },
                        { id: '01-01-03', name: 'Windows Photo Viewer', tooltip: 'Windows Photo Viewer' },
                    ]
                },
                {
                    id: '01-02', name: 'Users', expanded: true, tooltip: 'Users',
                    subChild: [
                        { id: '01-02-01', name: 'Smith', tooltip: 'Smith' },
                        { id: '01-02-02', name: 'Public', tooltip: 'Public' },
                        { id: '01-02-03', name: 'Admin', tooltip: 'Admin' },
                    ]
                },
                {
                    id: '01-03', name: 'Windows', tooltip: 'Windows',
                    subChild: [
                        { id: '01-03-01', name: 'Boot', tooltip: 'Boot' },
                        { id: '01-03-02', name: 'FileManager', tooltip: 'FileManager' },
                        { id: '01-03-03', name: 'System32', tooltip: 'System32' },
                    ]
                },
            ]
        },
        {
            id: '02', name: 'Local Disk (D:)', tooltip: 'Local Disk (D:)',
            subChild: [
                {
                    id: '02-01', name: 'Personals', tooltip: 'Personals',
                    subChild: [
                        { id: '02-01-01', name: 'My photo.png', tooltip: 'My photo.png' },
                        { id: '02-01-02', name: 'Rental document.docx', tooltip: 'Rental document.docx' },
                        { id: '02-01-03', name: 'Pay slip.pdf', tooltip: 'Pay slip.pdf' },
                    ]
                },
                {
                    id: '02-02', name: 'Projects', tooltip: 'Projects',
                    subChild: [
                        { id: '02-02-01', name: 'ASP Application', tooltip: 'ASP Application' },
                        { id: '02-02-02', name: 'TypeScript Application', tooltip: 'TypeScript Application' },
                        { id: '02-02-03', name: 'React Application', tooltip: 'React Application' },
                    ]
                },
                {
                    id: '02-03', name: 'Office', tooltip: 'Office',
                    subChild: [
                        { id: '02-03-01', name: 'Work details.docx', tooltip: 'Work details.docx' },
                        { id: '02-03-02', name: 'Weekly report.docx', tooltip: 'Weekly report.docx' },
                        { id: '02-03-03', name: 'Wish list.csv', tooltip: 'Wish list.csv' },
                    ]
                },
            ]
        },
        {
            id: '03', name: 'Local Disk (E:)', tooltip: 'Local Disk (E:)',
            subChild: [
                {
                    id: '03-01', name: 'Pictures', tooltip: 'Pictures',
                    subChild: [
                        { id: '03-01-01', name: 'Wind.jpg', tooltip: 'Wind.jpg' },
                        { id: '03-01-02', name: 'Stone.jpg', tooltip: 'Stone.jpg' },
                        { id: '03-01-03', name: 'Home.jpg', tooltip: 'Home.jpg' },
                    ]
                },
                {
                    id: '03-02', name: 'Documents', tooltip: 'Documents',
                    subChild: [
                        { id: '03-02-01', name: 'Environment Pollution.docx', tooltip: 'Environment Pollution.docx' },
                        { id: '03-02-02', name: 'Global Warming.ppt', tooltip: 'Global Warming.ppt' },
                        { id: '03-02-03', name: 'Social Network.pdf', tooltip: 'Social Network.pdf' },
                    ]
                },
                {
                    id: '03-03', name: 'Study Materials', tooltip: 'Study Materials',
                    subChild: [
                        { id: '03-03-01', name: 'UI-Guide.pdf', tooltip: 'UI-Guide.pdf' },
                        { id: '03-03-02', name: 'Tutorials.zip', tooltip: 'Tutorials.zip' },
                        { id: '03-03-03', name: 'TypeScript.7z', tooltip: 'TypeScript.7z' },
                    ]
                },
            ]
        }
    ];
    public field: Object = { dataSource: this.hierarchicalData, id: 'id', text: 'name', child: 'subChild' };
}
@import 'node_modules/@syncfusion/ej2-base/styles/material.css';
@import 'node_modules/@syncfusion/ej2-inputs/styles/material.css';
@import 'node_modules/@syncfusion/ej2-buttons/styles/material.css';
@import 'node_modules/@syncfusion/ej2-angular-base/styles/material.css';
@import 'node_modules/@syncfusion/ej2-angular-navigations/styles/material.css';
@import 'node_modules/@syncfusion/ej2-angular-inputs/styles/material.css';
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));