Set cursor position while focus on the input textbox in Angular Maskedtextbox component

4 Apr 20233 minutes to read

By default, on focusing the MaskedTextBox the entire mask gets selected. You can customize by using any one of the following methods:

• Setting cursor position at the start of the MaskedTextBox.
• Setting cursor position at the end of the MaskedTextBox.
• Setting cursor at the specified position in the MaskedTextBox.

The selectionStart and selectionEnd set to 0 instead of the input element value’s length, when we focus on a MaskedTextBox control filled with all mask characters. This is the default behavior of the HTML 5 input element.

Following is an example that demonstrates the above cases to set cursor position in the MaskedTextBox using focus event.

app.component.ts

import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    // sets mask format to the MaskedTextBox
    template: `
            <div class="col-sm-6">
                <br/><ejs-maskedtextbox #mask="" id="mask1" mask='00000-00000' value='93828-32132' name="mask_value1" placeholder= 'Default cursor position' floatLabelType= 'Always'></ejs-maskedtextbox><br/>
                <ejs-maskedtextbox #mask="" id="mask2" mask='00000-00000' value='83929-4342' name="mask_value2" placeholder= 'Cursor positioned at start' floatLabelType= 'Always' (focus)= "onStartfocus($event)"></ejs-maskedtextbox><br/>
                <ejs-maskedtextbox #mask="" id="mask3" mask='00000-00000' value='83929-3213' name="mask_value3" placeholder= 'Cursor positioned at end' floatLabelType= 'Always' (focus)= "onEndfocus($event)"></ejs-maskedtextbox><br/>
                <ejs-maskedtextbox #mask="" id="mask4" mask='[phone]' value='234-432-432' name="mask_value4" placeholder= 'Cursor at specified position' floatLabelType= 'Always' (focus)= "onSpecificfocus($event)"></ejs-maskedtextbox>
            </div>
    `
})

export class AppComponent {
    public onStartfocus(args): void {
        //sets cursor position at start of MaskedTextBox
        args.selectionEnd= args.selectionStart = 0;
        }
        public onEndfocus(args): void {
        //sets cursor position at end of MaskedTextBox
        args.selectionStart=args.selectionEnd = args.maskedValue.length;
        }
        public onSpecificfocus(args): void {
        //sets cursor at specified position
        args.selectionStart = 3;
        args.selectionEnd = 3;
        }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { MaskedTextBoxModule } from '@syncfusion/ej2-angular-inputs';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,MaskedTextBoxModule
    ],
    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';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);