We want the user to confirm their email address by entering a code.
We also want to use a disabled email reactive material input field so that it only shows the email address without any editing capability:
<mat-form-field>
<input matInput placeholder="Email" type="email" formControlName="email">
</mat-form-field>
Approach
email = 'stephen@colbert.com';
confirm: FormGroup = new FormGroup({
email: new FormControl({value: this.email, disabled: true}),
code: new FormControl('', [ Validators.required, Validators.min(3) ])});