Code/pincode input component for angular

Robust and tested code (number/chars) input component for Angular 7 - 16+ projects.
Ionic 4 - 7+ is supported, can be used in iOS and Android.
Clipboard events are supported.

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Preview

Supported platforms

Angular 7 - 16+
Ionic 4 - 7+
Mobile browsers and WebViews on: Android and iOS
Desktop browsers: Chrome, Firefox, Safari, Edge v.79 +
Other browsers: Edge v.41 - 44 (without code hidden feature)

Installation

$ npm install --save angular-code-input

Choose the version corresponding to your Angular version:

Angular	angular-code-input
16+	2.x+
7-15	1.x+

Usage

Import CodeInputModule in your app module or page module:

import { CodeInputModule } from 'angular-code-input';

@NgModule({
  imports: [
    // ...
    CodeInputModule
  ]
})

It is possible to configure the component across the app using the root config. In such case the import will look as follows:

import { CodeInputModule } from 'angular-code-input';

@NgModule({
  imports: [
    // ...
    CodeInputModule.forRoot({
      codeLength: 6,
      isCharsCode: true,
      code: 'abcdef'
    }),
  ]
})

Include the component on page template HTML:

  <code-input [isCodeHidden]="true"
              [codeLength]="5"
              (codeChanged)="onCodeChanged($event)"
              (codeCompleted)="onCodeCompleted($event)">
  </code-input>

Inside a page script:

  // this called every time when user changed the code
  onCodeChanged(code: string) {
  }

  // this called only if user entered full code
  onCodeCompleted(code: string) {
  }

Configuration

View

It is possible to configure the component via CSS vars
or using ::ng-deep (deprecated) angular CSS selector ::ng-deep

CSS vars:

CSS Var	Description
--text-security-type: disc;	Text presentation type when the isCodeHidden is enabled
--item-spacing: 4px;	Horizontal space between input items
--item-height: 4.375em;	Height of input items
--item-border: 1px solid #dddddd;	Border of input item for an empty value
--item-border-bottom: 1px solid #dddddd;	Bottom border of input item for an empty value
--item-border-has-value: 1px solid #dddddd;	Border of input item with a value
--item-border-bottom-has-value: 1px solid #dddddd;	Bottom border of input item with a value
--item-border-focused: 1px solid #dddddd;	Border of input item when focused
--item-border-bottom-focused: 1px solid #dddddd;	Bottom border of input item when focused
--item-shadow-focused: 0px 1px 5px rgba(221, 221, 221, 1);	Shadow of input item when focused
--item-border-radius: 5px;	Border radius of input item
--item-background: transparent;	Input item background
--item-font-weight: 300;	Font weight of input item
--color: #171516;	Text color of input items

Example with only bottom borders:

/* inside page styles*/
...
  code-input {
    --item-spacing: 10px;
    --item-height: 3em;
    --item-border: none;
    --item-border-bottom: 2px solid #dddddd;
    --item-border-has-value: none;
    --item-border-bottom-has-value: 2px solid #888888;
    --item-border-focused: none;
    --item-border-bottom-focused: 2px solid #809070;
    --item-shadow-focused: none;
    --item-border-radius: 0px;
  }
...

Component options

Property	Type	Default	Description
codeLength	number	4	Length of input code
inputType	string	tel	Type of the input DOM elements like <input [type]="inputType"/> default 'tel'
isCodeHidden	boolean	false	When true inputted code chars will be shown as asterisks (points)
isCharsCode	boolean	false	When true inputted code can contain any char and not only digits from 0 to 9. If the input parameter code contains non digits chars and isCharsCode is false the value will be ignored
isPrevFocusableAfterClearing	boolean	true	When true after the input value deletion the caret will be moved to the previous input immediately. If false then after the input value deletion the caret will stay on the current input and be moved to the previous input only if the current input is empty
isFocusingOnLastByClickIfFilled	boolean	false	When true and the code is filled then the focus will be moved to the last input element when clicked
initialFocusField	number	-	The index of the input box for initial focusing. When the component will appear the focus will be placed on the input with this index. Note: If you need to dynamically hide the component it is needed to use *ngIf directive instead of the [hidden] attribute
code	string / number	-	The input code value for the component. If the parameter contains non digits chars and isCharsCode is false the value will be ignored
disabled	boolean	false	When true then the component will not handle user actions, like in regular html input element with the disabled attribute
autocapitalize	string	-	The autocapitalize attribute is an enumerated attribute that controls whether and how text input is automatically capitalized as it is entered/edited by the user

Events

Event	Description
codeChanged	Will be called every time when a user changed the code
codeCompleted	Will be called only if a user entered full code

Methods

For calling the component's methods it is required to access the component inside the template or page script. It can be reached as follows.

Inside the page template HTML add a template ref:

<code-input
  ...
  #codeInput
  ...
>
</code-input>

Inside a page script attach the component:

...
// adding to the imports
import {CodeInputComponent} from 'angular-code-input';
...
// adding to the page props
@ViewChild('codeInput') codeInput !: CodeInputComponent;
...
// calling the component's methods somewhere in the page.
// IMPORTANT: it will be accessible only after the view initialization!
this.codeInput.reset();

Method	Description
focusOnField(index: number): void	Focuses the input caret on the input box with the passed index
reset(isChangesEmitting = false): void	Resets the component values in the following way: if the code option is supplied then the value will be reset to the code option value. If the code option is not supplied then the component will be reset to empty values. if the initialFocusField option is supplied then the caret will be focused in that filed after reset. if the isChangesEmitting param is passed then changes will be emitted