Angular DigitOnly Directive and Mask Directive

Demo

Medium Article: Digit Only Directive in Angular

• input digitOnly directive

  An Angular directive only allows [0-9] in the input box when typing, pasting or drag/dropping. This directive handles both Windows keyboard and Mac keyboard. This directive works with input type="text", not input type="number".

• input mask directive

  This directive checks the input pattern attribute if set.

CHANGELOG

• v4.0.0: this package now updated to Angular v19 and uses the style of standalone directive.

• v3.2.0(v2.4.0): digitOnly directive now supports disabling paste events (merges a pull request #57, fixes #56).

• v3.1.0(v2.3.0): digitOnly directive now supports negative values (merges a pull request #49).

• v3.0.0: a release on par with Angular 12. For projects in Angular v10 or v11, please use v2 of this library.

• v2.2.3: fix an issue (#50) in the mask directive: support dynamic pattern attribute binding.

• v2.2.2: fix an issue (#28) to prevent dead keys in the digitOnly directive.

• v2.2.1: digitOnly directive now dispatches an input event when paste in Firefox.

• v2.2.0: fix an issue (#35): for better international support, both mask and digitOnly directives now also check the code attribute in KeyboardEvent.

• v2.1.0(v1.9.0): fix an issue (#39) when typing decimal numbers for the digitOnly directive

• v2.0.0: add tslib v2.0 in the dependency, which is required by TypeScript 3.9 (as of Angular 10).

• v1.8.0: fix an issue (#38) when pasting in IE and Edge for the digitOnly directive

• v1.7.0: the digitOnly directive allows model binding to min, max, and pattern properties.

  • See demo page for examples.

• v1.6.0: the mask directive is added to this library.

  • See an example below about an input allows ##-####.

• v1.5.0: this directive checks the input pattern attribute if set.

  • See an example below about an input only allows decimal numbers with precision of 2.

• v1.3.0: this directive accepts an attribute for the separator for decimal numbers.

  • By default, the separator is a .. You can set it to comma when needed.

• v1.1.0: this directive accepts an attribute which indicates if the input number allows a decimal point.

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Installation

npm i @uiowa/digit-only

Usage

// in your Angular component
import { DigitOnlyDirective } from "@uiowa/digit-only";

@Component({
  selector: "app-digit-only-demos",
  imports: [DigitOnlyDirective, FormsModule],
  templateUrl: "./digit-only-demos.component.html",
  styleUrl: "./digit-only-demos.component.css",
})
export class DigitOnlyDemosComponent {}

<!-- in your component.html -->
<input type="text" digitOnly />

<!-- pull out the numeric keypad in mobile devices and tablets -->
<input type="text" name="zipcode" id="zipcode" placeholder="00000" maxlength="5" inputmode="numeric" pattern="[0-9]*" digitOnly />

<!-- turn off browser autocomplete -->
<input ... autocomplete="off" />

<!-- allows decimal input -->
<input id="decimal-number" type="text" digitOnly decimal="true" placeholder="000" />

<!-- allows to set decimal separator -->
<label for="digit-only-decimal-comma">
  Digit Only input box that allows a <i>decimal point</i> using
  <strong>a comma as the separator</strong>
</label>
<input id="digit-only-decimal-comma" type="text" digitOnly decimal="true" decimalSeparator="," placeholder="0,00" pattern="[0-9]+([,][0-9]+)?" />

<!-- Digit Only input only allows two decimal places -->
<input id="currency" type="text" name="currency" inputmode="numeric" pattern="^\d+(\.\d{1,2})?$" placeholder="0.00" digitOnly decimal="true" />

mask directive usage

<!-- input masked with pattern attribute: ##-#### -->

<input id="org-dept" type="text" pattern="^(\d{0,2}|\d{2}-\d{0,4})$" name="org-dept" title="org-dept" placeholder="00-0000" mask />