Prevent the focus on the first element in Angular Dialog component

27 Sep 20234 minutes to read

By default, the dialog focuses on the first elements of the content area which can be active and focusable. You can prevent this default focusing behavior using the open event and by enabling the preventFocus argument.

Bind the open event and enable the preventFocus argument within an event like the below sample.

app.component.ts

import { Component, ViewChild, OnInit, ElementRef } from '@angular/core';
import { DialogComponent } from '@syncfusion/ej2-angular-popups';
import { EmitType } from '@syncfusion/ej2-base';

@Component({
    selector: 'app-root',
    template: `
    <button class="e-control e-btn" style="position: absolute;" id="targetButton" (click)="onOpenDialog($event)">Open Dialog</button>
    <div #container class='root-container'></div>
    <ejs-dialog id='dialog' #ejDialog header='Sign In' [buttons]='buttons' [target]='targetElement' width='300px' (open)="onOpen($event)">
        <ng-template #content>
            <div class='form-group'><label for='email'>Email:</label>
                <input type='email' class='form-control' id='email'>
            </div>
            <div class='form-group'>
                <label for='comment'>Password:</label>
                <input type='password' class='form-control' id='password'>
            </div>
        </ng-template>
    </ejs-dialog>`
})

export class AppComponent implements OnInit {
  @ViewChild('ejDialog') ejDialog: DialogComponent | undefined;
  // Create element reference for dialog target element.
  @ViewChild('container', { read: ElementRef }) container: ElementRef | undefined;
  // The Dialog shows within the target element.
  public targetElement?: HTMLElement;

  // To get all element of the dialog component after component get initialized.
  ngOnInit() {
    this.initilaizeTarget();
  }

  // Initialize the Dialog component target element.
  public initilaizeTarget: EmitType<object> = () => {
    this.targetElement = this.container!.nativeElement.parentElement;
  }
  // Sample level code to handle the button click action
  public onOpenDialog = (event: any): void => {
    // Call the show method to open the Dialog
    this.ejDialog!.show();
  };

  public onOpen(args: any): void {
    //Preventing the default dialog focus
    args.preventFocus = true;
  }
    // Hide the Dialog when click the footer button.
    public hideDialog: EmitType<object> = () => {
      this.ejDialog!.hide();
  }

  // Enables the footer buttons
  public buttons: Object = [
    {
      'click': this.hideDialog.bind(this),
      // Accessing button component properties by buttonModel property
        buttonModel:{
        content: 'OK',
        // Enables the primary button
        isPrimary: true
      }
    },
    {
      'click': this.hideDialog.bind(this),
      buttonModel: {
        content: 'Cancel'
      }
    }
  ];


}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DialogModule } from '@syncfusion/ej2-angular-popups';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
		DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

main.ts

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

import 'zone.js';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);