ngx-mask

What is ngx-mask?

ngx-mask is an Angular library that provides input masking capabilities. It allows developers to define patterns for input fields, ensuring that users enter data in a specific format. This is particularly useful for fields like phone numbers, dates, and credit card numbers.

What are ngx-mask's main functionalities?

Basic Input Masking

This feature allows you to apply a basic mask to an input field. In this example, the input field will only accept numbers in the format of '0000-0000-0000-0000', which is useful for credit card numbers.

<input type='text' mask='0000-0000-0000-0000' />

Date Masking

This feature allows you to apply a date mask to an input field. The input field will only accept dates in the format of 'DD/MM/YYYY'.

<input type='text' mask='00/00/0000' />

Custom Masking

This feature allows you to create custom masks. In this example, the input field will accept a pattern like 'A0A 0A0', which is useful for postal codes.

<input type='text' mask='A0A 0A0' />

Dynamic Masking

This feature allows you to apply a mask dynamically based on a variable. The 'dynamicMask' variable can be changed at runtime to apply different masks.

<input type='text' [mask]='dynamicMask' />

Other packages similar to ngx-mask

text-mask

text-mask is a library that provides input masking for various frameworks including Angular, React, and Vue. It offers similar functionality to ngx-mask but is more versatile as it supports multiple frameworks.

cleave.js

cleave.js is a JavaScript library for formatting input fields. It supports a wide range of input types including credit card numbers, phone numbers, and dates. Compared to ngx-mask, cleave.js offers more built-in formats and is framework-agnostic.

imask

imask is a versatile input masking library that supports a wide range of input types and custom masks. It is similar to ngx-mask but offers more advanced features like dynamic mask changing and custom mask definitions.

README

ngx-mask

Installing

$ npm install --save ngx-mask

Quickstart

Import ngx-mask module in Angular app.

import {NgxMaskModule} from 'ngx-mask'

(...)

@NgModule({
  (...)
  imports: [
    NgxMaskModule.forRoot(options)
  ]
  (...)
})

Then, just define masks in inputs.

Usage

<input type='text' mask='{here comes your mask}' >

Also you can use mask pipe

Usage

<span>{{phone | mask: '[phone]'}}</span>

Examples

mask	example
9999-99-99	2017-04-15
0*.00	2017.22
000.000.000-99	048.457.987-98
AAAA	0F6g
SSSS	asDF

Mask Options

You can define your custom options for all directives (as object in the mask module) or for each (as attributes for directive). If you override this parameter, you have to provide all the special characters (default one are not included).

specialCharacters (string[ ])

We have next default characters:

character
/
(
)
.
:
-
space
+
,
@

Usage

<input type='text' [specialCharacters]="[ '[' ,']' , '\\' ]" mask="[00]\[000]" >

Then:

Input value: 789-874.98
Masked value: [78]\[987]

patterns ({ [character: string]: { pattern: RegExp, optional?: boolean})

We have next default patterns:

code	meaning
0	digits (like 0 to 9 numbers)
9	digits (like 0 to 9 numbers), but optional
A	letters (uppercase or lowercase) and digits
S	only letters (uppercase or lowercase)

Usage:

<input type='text' [patterns]="customPatterns" mask="(000-000)" >

and in your component

public customPatterns = {'0': { pattern: new RegExp('\[a-zA-Z\]')}};

Then:

Input value: 789HelloWorld
Masked value: (Hel-loW)

prefix (string)

You can add prefix to you masked value

Usage

<input type='text' prefix="+7 " mask="(000) 000 00 00" >

sufix (string)

You can add sufix to you masked value

Usage

<input type='text' sufix=" $" mask="0000" >

dropSpecialCharacters (boolean)

You can choose if mask will drop special character in the model, or not, default value true

Usage

<input type='text' [dropSpecialCharacters]="false" mask="000-000.00" >

Then:

Input value: 789-874.98
Model value: 789-874.98

showMaskTyped (boolean)

You can choose if mask is shown while typing, or not, default value false

Usage

 <input mask="[phone]" prefix="+7" [showMaskTyped] = "true">

clearIfNotMatch (boolean)

You can choose clear the input if the input value not match the mask, default value false

Pipe with mask expression and custom Pattern ([string, pattern])

You can pass array of expression and custom Pattern to pipe

Usage

 <span>{{phone | mask: customMaska}}</span>

and in your component

customMaska: [string, pattern];

pattern =  {
    'P': {
        pattern: new RegExp('\\d'),
    }};
  
this.customMaska = ['PPP-PPP', this.pattern];

Repeat mask

You can pass into mask pattern with brackets

Usage

 <input type='text' mask="A{4}">

Thousand separator

You can devide your input by thousands

Usage

 <input type='text' mask="separator">

For separate input with dots

 <input type='text' mask="dot_separator">

For using decimals enter '.' to the end of your input to 'separator' mask and ',' to 'dot_separator'

 <input type='text' mask="comma_separator">

For using decimals enter '.' to the end of your input to 'separator' or 'comma_separator' mask and ',' to 'dot_separator'

Input value: 1234.56
Masked value: 1 234.56

Input value: 1234,56
Masked value: 1.234,56

Input value: 1234.56
Masked value: 1,234.56

 <input type='text' mask="dot_separator.2">
 <input type='text' mask="comma_separator.2">
 <input type='text' mask="dot_separator.0">
 <input type='text' mask="comma_separator.0">

For limiting decimal precision add '.' and the precision you want to limit too on the input. 2 is useful for currency. 0 will prevent decimals completely.

Input value: 1234,56
Masked value: 1.234,56

Input value: 1234.56
Masked value: 1,234.56

Input value: 1234,56
Masked value: 1.234

Input value: 1234.56
Masked value: 1,234

Time validation

You can validate your input as 24 hour format

Usage

 <input type='text' mask="Hh:M0:s0">

Percent validation

You can validate your input for percents

Usage

 <input type='text' mask="percent" sufix="%">

Examples

Check the demo.