Hello All, In this angular 13 tutorial, We will discuss How to implement mobile number validation in angular 13 applications. In the last angular tutorial, We had discussed How to create a search filter functionality in angular applications.
In reactive forms, We need to validate 10 digits mobile numbers. This can be validated using Validators from angular forms. We can validate the mobile number with the help of a regex pattern. Also, If this field is compulsory/required then also we can validate it. So, This validation is covered in this tutorial.
Table of Contents
Steps required for mobile number validation in angular 13
- Step1: Create Angular Project
- Step2: Import ReactiveFormsModule & FormsModule
- Step3: Update Template
- Step4: Update TS Code
- Step5: Update SCSS
- Step6: Run & See the Output
Step1: Create angular project
Create a new angular project using the below command.
ng new <APPNAME>
Now, move to our root project directory using the following command
cd <APPNAME>
Open the newly created angular project in Visual Studio Code. Use the following command to open the project.
code .
Step2: Import ReactiveFormsModule & FormsModule
Now, We need to import two modules ReactiveFormsModule & FormsModule from angular forms. We import these modules as follows
Update app.module.ts as shown below
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ReactiveFormsModule, FormsModule } from '@angular/forms';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
ReactiveFormsModule,
FormsModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
Step3: Update Template
Now, We have to update our HTML template. We will use the form element which contains the input field for mobile numbers. Then, We will give the FormGroup name which is a valid name for the form. After that, For every input element, We need to give formControlName. In this example, We are only using the mobile number input filed. So, We are using only one formControlName. On the bottom side, We use one button which handles the click event. In this event, We will capture the input field value.
Update the app.component.html as shown below
<form [formGroup]="formGrp" novalidate>
<div>
<label>Mobile Number (10 Digit)</label>
<label class="show-error">*</label><br>
<input type="tel" formControlName="mobctrl" [(ngModel)]="mobileNumber" placeholder="Please enter mobile number here">
<div *ngIf="mobno['mobctrl'].touched && mobno['mobctrl'].invalid" class="show-error">
<div *ngIf="mobno['mobctrl'].errors?.['required'] && mobno['mobctrl'].dirty">Please enter mobile number</div>
<div *ngIf="mobno['mobctrl'].errors?.['pattern'] && mobno['mobctrl'].dirty">Please enter 10 digit mobile number</div>
</div>
</div>
<div>
<button type="submit" [disabled]="!formGrp.valid" (click)="doSubmit()">Save</button>
</div>
</form>
Step4: Update TS Code
In our TypeScript file, We need to import FormBuilder, FormGroup, Validators from angular forms.
Update app.component.ts as shown below
import { Component } from '@angular/core';
import { AbstractControl, FormBuilder, FormGroup, Validators } from '@angular/forms';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent {
formGrp: FormGroup;
mobileNumber: number;
constructor(formBuilder: FormBuilder) {
this.mobileNumber = 0;
this.formGrp = formBuilder.group({
mobctrl: ['', [Validators.required, Validators.pattern("^((\\+91-?)|0)?[0-9]{10}$")]]
})
}
get mobno(){
return this.formGrp.controls;
}
doSubmit() {
console.log(this.formGrp.value);
console.log(this.mobileNumber);
}
}
Step5: Update SCSS
We are showing the error part using CSS as shown below.
Update app.component.scss
.show-error{
color: red;
}
Step6: Run & See the Output
Now, Everything is done. Just need to run the angular application & see the output.
Run the Angular application using the below command
ng serve
Output
In this output, We can get the input values using two ways. One is from form value & another uses ngModel.

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