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

• 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.

---

Installation

npm i @uiowa/digit-only

Usage

// in your Angular module
import { DigitOnlyModule } from '@uiowa/digit-only';

@NgModule({
  declarations: [
    ...
  ],
  imports: [
    BrowserModule,
    DigitOnlyModule
  ],
  ...
})
export class YourModule { }

// 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: <code>##-####</code>
<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
/>