Ensure that the input field consistently shows numbers with exactly two decimal places

Below is an input field that I want to always display the input value with 2 decimal places. For example, if I input 1, it should show as 1.00 in the input field. How can this be achieved using formControl since ngModel is not being used? Thank you.

I attempted to use mask="separator.2 but it did not work. Any ideas or help would be appreciated.

Click here for image description

#html code

<mat-form-field appearance="fill">
    <mat-label>Acres</mat-label>
    <input mask="separator.2" thousandSeparator="," matInput formControlName="acres" placeholder="">
</mat-form-field>

#ts code

private _createModelForm(): FormGroup {
    return this.formBuilder.group({
        acres: this.model.acres
    });
}
javascriptangulartypescriptangular-material

Answer №1

When working with reactive forms and updating a value, make sure to update the value that you want to be displayed in the HTML.

To achieve this in TypeScript with Angular, you can utilize the DecimalPipe:

import { DecimalPipe } from '@angular/common';

export class Mycomponent {

    constructor(private decimalPipe: DecimalPipe) {}

    private _createModelForm(): FormGroup {
    return this.formBuilder.group({
      acres: this.transformDecimal(this.model.acres)
    });
  }

  transformDecimal(num) {
    return this.decimalPipe.transform(num, '1.2-2');
  }
}

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