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)

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}">

Examples

Check the demo.