Angular 13 Regex Validate URL with Reactive Forms

Angular 13 URL validation using regular expression; Through this tutorial, i am going to show you how to validate URL in angular 13 applications using regex.

Angular 13 Regex Validate URL with Reactive Forms

Follow below given steps to validate url using regex in angular 13 apps; as follows:

  • Step 1 – Create New Angular App
  • Step 2 – Install Bootstrap Library
  • Step 3 – Update Dependencies in Module.ts File
  • Step 4 – Create Form in View File
  • Step 5 – Add Code On app.Component ts File
  • Step 6 – Start the Angular App

Step 1 – Create New Angular App

Run the following command on terminal to install angular app:

ng new my-new-app

Step 2 – Install Bootstrap Library

Run the following command on your terminal to install bootstrap library in angular app. So, You can install the packages by executing the following commands on the terminal:

npm install --save bootstrap

Then you need to add below code into your angular.json file:

...
"styles": [
              "src/styles.css",
              "node_modules/bootstrap/dist/css/bootstrap.min.css"
          ],
"scripts": ["node_modules/bootstrap/dist/js/bootstrap.min.js"]
...

Step 3 – Update Dependencies in Module.ts File

Go to src/app directory and open app.module.ts file. And then add the following lines of into app.module.ts file:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { ReactiveFormsModule, FormsModule } from '@angular/forms';
@NgModule({
  declarations: [
    AppComponent,
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    ReactiveFormsModule,
    FormsModule    
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Step 4 – Create Form in View File

Go to src/app/ and app.component.html and update the following code into it:

<div class="container mt-5">
  <h2>Angular 13 Regex URL Pattern Validation Example Tutorial - Laratutorials.com</h2>
  <form [formGroup]="myForm" (ngSubmit)="onSubmit()" novalidate>
    <div class="form-group">
      <label>Enter URL</label>
      <input type="text" formControlName="url" class="form-control mb-2">
        <div *ngIf="m['url'].touched && m['url'].invalid" class="alert alert-danger">
            <div *ngIf="m['url'].errors && m['url'].errors['required']">Please provide url</div>
            <div *ngIf="m['url'].errors && m['url'].errors['pattern']">Please provide valid url</div>
        </div>
    </div>
    <div class="d-grid mt-3">
      <button class="btn btn-dark" [disabled]="!myForm.valid" type="submit">Store</button>
    </div>
  </form>
</div>

Step 5 – Add Code On app.Component ts File

Go to src/app directory and open app.component.ts. Then add the following code into component.ts file:

import { Component } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  
  public myForm: FormGroup;
  
  constructor(private formBuilder: FormBuilder) {
    this.myForm = formBuilder.group({
      url: ['', [Validators.required, Validators.pattern('(https?://)?([\\da-z.-]+)\\.([a-z.]{2,6})[/\\w .-]*/?')]]
    })
  }
    
  get m(){
    return this.myForm.controls;
  }
   
  onSubmit(){
    console.log(this.myForm.value);
  }
  
}

Step 6 – Start the Angular App

Run the following command on terminal to start angular phone number validation app:

ng serve

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