Angular 13 Regex Validate URL with Reactive Forms

Angular 13 URL validation with regular expression; In this article, we’ll discover how to use regex to validate URLs in angular 13 applications..

Angular 13 Regex Validate URL with Reactive Forms

Use the following procedures with angular 13 apps to validate urls using regex:

• 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

First of all, open your terminal and execute the following command on it to install angular app:

ng new my-new-app

Step 2 – Install Bootstrap Library

In this step, execute 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

In this step, visit 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

In this step, create simple form for validating URL using regex in angular 13 app. So, visit 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 - Tutsmake.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?.required">Please provide url</div>
        <div *ngIf="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

In this step, visit the 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

In this step, execute the following command on terminal to start angular phone number validation app:

ng serve