Load tab items dynamically in Angular Tab component

22 Sep 20255 minutes to read

Tabs can be added dynamically by passing an array of items and index value to the addTab method.

    // New tab title and content inputs are fetched and stored in local variable
    let title: string = document.getElementById('tab-title').value;
    let content: string = document.getElementById('tab-content').value;

    // Required tab item object formed by using textbox inputs
    let item: Object =  { header: { text: title }, content: createElement('pre', { innerHTML: content.replace(/\n/g, '<br>\n') }).outerHTML };

    // Item object and the index argument passed into the addTab method to add a new tab
    this.tabInstance.addTab([item], this.totalItems-1);

In the following demo, tab content can be added by clicking the + icon. This + icon is added to the tab header using the iconCss property. Enter the new Tab heading and content details in the available text boxes, then click the ‘Add Tab’ button. The details are passed as an array, and the new tab is appended at the end using the calculated last index.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { FormsModule } from '@angular/forms'
import { TabModule } from '@syncfusion/ej2-angular-navigations'




import { Tooltip } from '@syncfusion/ej2-popups';
import { Component, ViewChild } from '@angular/core';
import { enableRipple, createElement } from '@syncfusion/ej2-base';
import { SelectEventArgs, TabComponent } from '@syncfusion/ej2-angular-navigations';

enableRipple(true);

/**
 * Add new tabs dynamically
 */

@Component({
imports: [
        FormsModule, TabModule
    ],


standalone: true,
    selector: 'app-container',
    template: `<ejs-tab #element id="element" (created)="tabCreated()" (selected)="tabSelected($event)">
            <e-tabitems>
                <e-tabitem [header]='headerText[0]' content="#tab1_content"></e-tabitem>
                <e-tabitem [header]='headerText[1]' content="#form-container"></e-tabitem>
            </e-tabitems>
        </ejs-tab>`
})

export class AppComponent {
      @ViewChild('element') tabInstance?: TabComponent;

    public totalItems?: number;
    public headerText: { text?: string, iconCss?: string }[] = [{ 'text': 'Tab1' }, { 'iconCss': 'e-add-icon' }];
    public tabCreated(): void {
        let tooltip: Tooltip = new Tooltip({
            content: 'Add Tab'
        });
        tooltip.appendTo('.e-ileft.e-icon');

        (document.getElementById('btn-add') as HTMLElement).onclick = (e : Event) => {
            let title: string = (document.getElementById('tab-title') as any).value;
            let content: string = (document.getElementById('tab-content') as any).value;
            let item: Object =  { header: { text: title }, content: createElement('pre', { innerHTML: content.replace(/\n/g, '<br>\n') }).outerHTML };

            this.totalItems = document.querySelectorAll('#element .e-toolbar-item').length;
            this.tabInstance?.addTab([item], this.totalItems-1);
        };
    }

    public tabSelected(args: SelectEventArgs): void {
        if (args.selectedIndex === document.querySelectorAll('#element .e-toolbar-item').length -1) {
            (document.getElementById('tab-title') as any).value = '';
            (document.getElementById('tab-content') as any).value = '';
        }
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));