the-mask-input

A simple way to create inputs with masked values. Works like <input />, but apply mask for your values.

Just 2.8kB Minified + Gzipped - Bundlephobia

How to Install?

npm i the-mask-input
yarn add the-mask-input
pnpm add the-mask-input

How can I use?

tl;dr examples

the-mask-input already has some default presets of mask, like cpf/cnpj (brazillian documents) and uuid.

import {Input} from "the-mask-input"

export default function App () {
	return <form>
		<Input name="cpf" placeholder="cpf" mask="cpf" />
	</form>
}

This is a simple code to use mask in your inputs.

Default masks

All built-in masks in <Input />

• cpf: 000.000.000-00
• cnpj: 00.000.000/0000-00
• cpfCnpj: 000.000.000-00 and 00.000.000/0000-00
• cep: 000000-000
• cellphone: (00) 90000-0000
• telephone: (00) 0000-0000
• cellTelephone: (00) 0000-0000 and (00) 90000-0000
• int: accept only integer numbers
• color: #000 and #000000
• creditCard: 0000 0000 0000 0000 0000
• date: dd/MM/yyyy - Default date is brazillian pattern
• isoDate: yyyy/MM/dd
• time: 00:00 - Accept only 0-23 in yours
• uuid: default uuid format

Create your own mask

If you need to create your own pattern, you can do using RegExp or strings as tokens. To create your masks, you can use

• Only a string as tokens
• Array of strings or RegExp
• A function returning an array of strings or RegExp

Using string

We can create a CPF mask only using string:

<Input mask="ddd.ddd.ddd-dd" />

d is a special token in the-mask-input, and has more:

• d: only numbers 0-9
• H: hexadecimals. 0-9 and a-f
• X: all numbers and strings A-Z (upper and lower case)
• x: only strings A-Z (upper and lower case)
• A: only strings A-Z, only upper case
• a: only strings A-Z, only lower case

Using array

In this option, you can use string and RegExp. Here you cannot use the-mask-input tokens. Let's create a Vehicle registration plates of Brazil

<Input mask={[/[A-Z]/, /[A-Z]/, /[A-Z]/, /\d/, /\d/, /\d/, /\d/]} />

Using function

In this mode, you can use a function to apply some logic before you return an array. Let's create a time mask, accept only 23 in hours.

const hourStartsWithTwo = ["2", /[0-3]/, ":", /[0-5]/, /\d/];
const hour = [/[012]/, /\d/, ":", /[0-5]/, /[0-9]/];
const mask = (value: string) => {
	const n = numbers (value);
	const first = n[0];
	return first === "2" ? hourStartsWithTwo : hour;
}
<Input mask={mask} />