Angular Material Forms Includes Validation Messages (Learn it in 14 Steps)

Srikanth
4 min readJun 4, 2022

Please find the below steps to implement Angular material Forms.

Photo by Leon Dewiwje on Unsplash

1.Create an angular project with the below command.

ng new angular-material-forms

2. After successful creation of an angular app, change the file directory to project-name. “cd angular-material-forms”.

Open the project in vs code using “code .” in terminal or open with vs code. Then run the project using “ng serve” in a terminal. Open project in chrome using localhost:4200

3. Open the app component in vs code and remove the content which is created by angular CLI while creating the app.

For Adding angular material using the command "ng add @angular/material"

4. Select theme, Am selecting Indigo/Pink, and click the below items as “yes

  • Set up global Angular Material typography styles? Am selecting as y
  • Set up browser animations for Angular Material? (Y/n) Select ‘y’.

5. Created Shared Module in the libs folder using “ng generate module shared”. And import , export material modules in “shared.module.ts”. And also add in the app.module.ts

shared.module.ts

6. Create audits component in the apps/component folder. And add audits component in router and path as audits.

7. Add “ReactiveFormsModule”, and “Forms Module” in app.module.ts as below

import { FormsModule, ReactiveFormsModule } from '@angular/forms';@NgModule({
declarations: [
AppComponent,
SignupComponent
],
imports: [
BrowserModule,
AppRoutingModule,
BrowserAnimationsModule,
FormsModule,
ReactiveFormsModule,
SharedModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

8. Open “audits.component.ts”, then add “formbuilder ” as a dependency in the constructor. Create a form variable above the constructor.

import { FormArray, FormBuilder, FormGroup, Validators } from '@angular/forms';
public form:FormGroup;
constructor(private fb:FormBuilder) { }
ngOnInit(): void { }

9. Create formInit method to initialize the form and call the method from either constructor or ngOnInit.

constructor(private fb:FormBuilder) { 
this.formInit()
}
ngOnInit(): void { }
private formInit(){
}

10. And create a form group using form builder and add controls in that same form. Form Controls like “firstName”, “second Name”, “email”, “username”, “password”, and “mobile”.

private formInit(){
this.form = this.fb.group({
firstName: ['',[Validators.required]],
lastName: ['',[Validators.required]],
username: ['',[Validators.required]],
email: ['',[Validators.required]],
password: ['',[Validators.required]],
});
}

11. After successfully following the above points. Add Html in signup.component.html related to the form step by step.

  • Add div and form tag in Html file.
<div class=”container”>
<form class=”form shadow m-3 p-3" [formGroup]=”form” (ngSubmit)=”submitForm()”>
<h1>Sign Up Form</h1>
</form>
</div>
  • Increase code by one form control and add validate message also.
<div class=”container”>
<form class=”form shadow m-3 p-3" [formGroup]=”form” (ngSubmit)=”submitForm()”>
<h1>Sign Up Form</h1>
<div class=”row mt-3">
<mat-form-field class=”col-md-6">
<mat-label>First Name</mat-label>
<input matInput formControlName=”firstName” placeholder=”Enter First Name”>
</mat-form-field>
</div>
</form>
</div>
  • Add all the controls and form validation messages.
<div class="container">
<form class="form shadow m-3 p-3" [formGroup]="form" (ngSubmit)="submitForm()">
<h1>Sign Up Form</h1>
<div class="row mt-3">
<mat-form-field class="col-md-6">
<mat-label>First Name</mat-label>
<input matInput formControlName="firstName" placeholder="Enter First Name">
<mat-error *ngIf="this.form.controls.firstName.hasError('required')">
First Name is <strong>required</strong>
</mat-error>
</mat-form-field>
</div>
<div class="row mt-3">
<mat-form-field class="col-md-6">
<mat-label>Last Name</mat-label>
<input matInput formControlName="lastName" placeholder="Enter Last Name">
<mat-error *ngIf="this.form.controls.lastName.hasError('required')">
Last Name is <strong>required</strong>
</mat-error>
</mat-form-field>
</div>
<div class="row mt-3">
<mat-form-field class="col-md-6">
<mat-label>User Name</mat-label>
<input matInput formControlName="username" placeholder="Enter Username">
<mat-error *ngIf="this.form.controls.username.hasError('required')">
Username is <strong>required</strong>
</mat-error>
</mat-form-field>
</div>
<div class="row mt-3">
<mat-form-field class="col-md-6">
<mat-label>Email</mat-label>
<input matInput formControlName="email" placeholder="Enter Email">
<mat-error *ngIf="this.form.controls.email.hasError('required')">
Email <strong>required</strong>
</mat-error>
</mat-form-field>
</div>
<div class="row mt-3">
<mat-form-field class="col-md-6">
<mat-label>Password</mat-label>
<input type="password" matInput formControlName="password" placeholder="Enter Password">
<mat-error *ngIf="this.form.controls.password.hasError('required')">
Password is <strong>required</strong>
</mat-error>
</mat-form-field>
</div>
<div class="row mt-3">
<button type="submit" mat-raised-button color="primary" class="m-2" style="width: 100px;" [disabled]="!form.valid">Submit Form</button>
<button type="button" mat-raised-button color="warn" class="m-2" style="width: 100px;" (click)="form.reset()">Reset</button>
</div>
</form>
</div>

12. After successfully adding the Html code and checking the changes in the browser. Add the submit method in signup.component.ts.

public submitForm(){
console.log(this.form);
console.log(this.form.getRawValue())
}

13. Test the form by giving all the forms and clicking on submit. You can able to see the values in the console.

14. And if you did not give values in the form you can able to see the error messages.

Output Screens:

output screen #1
output screen #2
output screen #3
Source Code
GitHub:
https://github.com/mryenagandula/angular-material-forms
Stack blitz Project Preview:
Mryenagandula - Angular Material Forms - StackBlitz

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Srikanth

Senior Software Engineer | Medium Articles | Storyteller | Quick Learner | React JS | Angular | Java | Learn Something new from my stories