ngx-otp-input
v1.1.2
Published
One Time Password input library for Angular (14+)
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ngx-otp-input
:warning: Important note: starting with version 1.0.0, the library has been completely rewritten to use standalone components and introduce breaking changes. As the section "Requirements" states, the library now requires Angular 14 or above.
What is this?
This is a simple Angular library that allows you to create an OTP (One Time Password) form by providing a set of options. The library is designed to be easy to use and highly customizable, allowing you to configure the form to suit your needs. If you like the library, please consider giving it a star on GitHub.
Demo page
http://ngx-otp-input.vercel.app
Requirements
To use this library, your project must be running Angular 14 or above. This requirement stems from our adoption of standalone components, which are an integral feature in Angular's modern development approach. Standalone components offer a more streamlined and modular way to manage your components and simplify the dependency management, positioning them as the future of Angular development.
Installation
To install this library, run:
npm install ngx-otp-input --save
Example Usage
Since the library uses standalone components, you can directly import and use them in your Angular application without needing to declare them in any module. For more configuration options, refer to the Configuration options section.
import { Component } from '@angular/core';
import { NgxOtpInputComponent, NgxOtpInputComponentOptions } from 'ngx-otp-input';
@Component({
selector: 'app-root',
standalone: true,
imports: [NgxOtpInputComponent],
template: `
<h1>Welcome to My Angular App</h1>
<ngx-otp-input [options]="otpOptions"></ngx-otp-input>
`,
styleUrls: ['./app.component.scss'],
})
export class AppComponent {
otpOptions: NgxOtpInputComponentOptions = {...};
}
Inputs
options: NgxOtpInputComponentOptions
The options
input is an object that allows you to configure the OTP form. For a list of available options, refer to the Configuration options section.
otp: string | null | undefined
The otp
input is a string that allows you to set the OTP value of the form. This input is useful when you want to pre-fill the form with an OTP value. If the otp
input is set to null
or undefined
, the form will be empty. The library will match the length of the OTP value with the otpLength
option and fill the input fields accordingly, in case the OTP value is shorter than the otpLength
option, the remaining fields will be empty. If the given value will not match the regexp
option, the library will throw an error.
status: NgxOtpStatus | null | undefined
The status
input is a string that allows you to set the status of the OTP form. The status can be one of the following values: null
, undefined
, 'success'
or 'failed'
. This status is only used to visually indicate the result of the OTP verification process.
For type safety, you can use the NgxOtpStatus
enum:
import { NgxOtpStatus } from 'ngx-otp-input';
@Component({
selector: 'app-root',
standalone: true,
imports: [NgxOtpInputComponent],
template: ` <ngx-otp-input [status]="otpStatusEnum.SUCCESS"></ngx-otp-input> `,
})
export class AppComponent {
status = NgxOtpStatus;
}
disabled: boolean
The disabled
input is a boolean that allows you to disable the OTP form. When set to true
, the form will be disabled and the user will not be able to interact with it.
Outputs
otpChange: string[]
The otpChange
output is an event that is emitted whenever the OTP value changes. The event payload is an array of strings, where each string represents a value in the OTP form.
otpComplete: string
The otpComplete
output is an event that is emitted whenever the OTP form is completed. The event payload is string, which represents the complete OTP value.
Configuration options
The NgxOtpInputComponentOptions
interface allows you to configure the OTP form. The following options are available:
| Option | Type | Default value | Description |
| -------------------- | -------- | ------------: | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| otpLength
| number | 6 | The number of inputs in the OTP form |
| autoFocus
| boolean | true | Whether the first input should be focused sautomatically |
| autoBlur
| boolean | true | Whether the form should be blurred on complete |
| hideInputValues
| boolean | false | Whether the input values should be shown as password fields |
| regexp
| RegExp | /^[0-9]+$/ | The regular expression that the input values should match |
| showBlinkingCursor
| boolean | true | Whether the input fields should have a blinking cursor |
| ariaLabels
| string[] | [] | An array of strings that represent the aria-labels for each input field. For more information, please refer to the More on aria-labels section. |
Styling
The library provides a set of CSS classes that you can use to style the OTP form. The following classes are available:
| Class name | Description |
| ------------------------ | -------------------------------------- |
| ngx-otp-input-form
| The main container of the OTP form |
| ngx-otp-input-box
| The input field of the OTP form |
| ngx-blinking-cursor
| The blinking cursor of the input field |
| ngx-otp-input-disabled
| The disabled state of the form |
| ngx-otp-input-filled
| The filled state of an input field |
| ngx-otp-input-success
| The success state of the form |
| nngx-otp-input-failed
| The failed state of the form |
How to use the classes
Styling is quite simple, but you have to use the classes directly in root style file, otherwise it will not work:
ngx-otp-input {
.ngx-otp-input-form {
...
}
.ngx-otp-input-box {
...
}
...
}
Reset the form
In order to reset the form, you can use the reset
method of the NgxOtpInputComponent
:
First, get a reference to the component in your template:
<ngx-otp-input
#otpInput
[options]="otpOptions"
></ngx-otp-input>
Then, get a reference to the component in your component class:
import { Component, ViewChild } from '@angular/core';
import { NgxOtpInputComponent } from 'ngx-otp-input';
@Component({
selector: 'app-root',
standalone: true,
imports: [NgxOtpInputComponent],
template: `
<ngx-otp-input
#otpInput
[options]="otpOptions"
></ngx-otp-input>
`,
})
export class AppComponent {
@ViewChild('otpInput') otpInput: NgxOtpInputComponent;
resetForm() {
this.otpInput.reset();
}
}
Under the hood, the reset
method will clear all the input values and reset the form to its initial state. For more information, refer to the Angular FormArray reset documentation.
More on aria-labels
The ariaLabels
option allows you to provide a set of strings that represent the aria-labels for each input field. This option is useful for making the form more accessible to users who rely on screen readers. The aria-label
attribute provides a way to specify a string that labels the current element, which can be read by screen readers to provide additional context to the user. The library will automatically assign the aria-label
attribute to each input with a default value of One Time Password Input Number
followed by the input index. However, you can override this default value by providing your own set of labels in the ariaLabels
option.
If you provide an array of strings in the ariaLabels
option, the library will use the values in the array to assign the aria-label
attribute to each input field. The array should contain the same number of strings as the otpLength
option, with each string representing the label for the corresponding input field. If the array contains fewer strings than the otpLength
option, the library will use the default value for the remaining input fields.
HTML inputmode
attribute
The inputMode
option allows you to set the inputmode
attribute of the input fields. The inputmode
attribute provides a hint to the browser about the type of data that is expected to be entered by the user. This hint can help the browser provide a more appropriate virtual keyboard layout for the input field, making it easier for the user to enter the correct data. The inputMode
option accepts a string value that represents the input mode of the input fields. For more details, check out this documentation.
Please note, that regexp
option should be set to support the inputmode
attribute. For example, if you set the inputMode
option to text
and the regexp
option to /^[a-zA-Z]+$/
, the browser will provide a virtual keyboard layout that is optimized for entering text data, but if the inputMode
option is set to numeric
and the regexp
is still /^[a-zA-Z]+$/
, the browser may provide a numeric keyboard layout, which may not be suitable for entering text data.
Default options for inputMode
and regexp
are set to 'numeric'
and /^[0-9]+$/
respectively, as these are the most common values for one time password inputs.
Side notes
If hideInputValues
is set to true
, the input values will be hidden by default, using the password
input type. However certain password managers may place their browser extension icon on the input field, which may interfere with the input field's appearance.
Contributing
If you would like to contribute to this project, please refer to the CONTRIBUTING file for more information.
Code of Conduct
Please read the CODE OF CONDUCT file for more information.
Changelog
See the CHANGELOG file for details.
License
This project is licensed under the MIT License - see the LICENSE file for details.