@thaborach/react-text-mask
v1.0.9
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A masked React Input component
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@thaborach/react-text-mask
React Text Mask is an input mask library. It can create input masks for phone, date, currency, zip code, percentage, email, and literally anything!
It is very configurable and allows you to create any type of input mask with minimal APIs.
It supports pasting, browser auto-fill, and all operations that a user would expect while interacting with an input field.
It works on mobile, has no 3rd party dependencies, and has a tiny footprint (less than 4KB gzipped).
It is forked from text mask which is deprecated and no longer being maintained.
Table of Contents
Installation and usage
Installation
npm:
npm i @thaborach/react-text-mask --save
yarn:
yarn add @thaborach/react-text-mask
Usage
import React from 'react'
import { MaskedInput } from 'react-text-mask'
export default function TelephoneInput(){
return (
<div>
<MaskedInput
type='tel'
mask={['(', /[1-9]/, /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]}
/>
</div>
)
}
<MaskedInput/>
is fully compatible with <input/>
element. So, you can
pass it CSS classes, a placeholder attribute, or even an onBlur
handler.
For example, the following works:
<MaskedInput
mask={['(', /[1-9]/, /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]}
type="tel"
className="form-control"
placeholder="Enter a phone number"
guide={false}
id="my-input-id"
onBlur={() => {}}
onChange={() => {}}
/>
Properties
Text Mask accepts the following values as props:
mask
(array, function, object or boolean) (required)type
('text' | 'tel' | 'url' | 'password' | 'search') (optional)guide
(boolean) (optional)pipe
(function) (optional)placeholderChar
(string) (optional)keepCharPositions
(boolean) (optional)showMask
(boolean) (optional)render
(function) (optional)
mask
mask
is an array, function or object that defines how the user input is going to be masked.
mask
array
Easiest way to define a mask is to use an array.
Each element in the array has to be either a string or a regular expression. Each string is a fixed character in the mask and each regular expression is a placeholder that accepts user input.
The regular expression will be used to test user input and either allow it or reject it.
For example, a mask for a U.S. based phone number such as (555) 392-4932
, could be:
['(', /[1-9]/, /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]
That means the user can only enter a number between 1 and 9 in the first placeholder, and only a digit in the placeholders after that.
Any valid regular expressions should work.
mask
function
You can also pass a function as the mask
. The function will receive the user input at every
change. The function is expected to return a mask
array as described above.
const mask = function(rawValue) {
// add logic to generate your mask array
return [ /*your mask array*/ ]
}
This feature is useful when we want to format a user input of unknown length, such as formatting a number to currency or formatting a string to email address mask.
For an example of a mask function, see the source code of
createNumberMask
,
which is a Text Mask addon.
mask
object
Coming soon...
mask
boolean
It is possible to set the mask to false
to disable masking completely.
type
It is set to text
by default.
We only support input types of text
, tel
, url
, password
, and search
.
Due to a limitation in browser API, other input types, such as email
or number
, cannot be supported. However, it is normal to let the user enter an email or a number in an input type text
combined with the appropriate input mask.
guide
guide
is a boolean that tells the component whether to be in guide or no guide mode.
It is set to true
by default.
pipe
You can provide a pipe
function that will give you the opportunity to modify the conformed value before it is
displayed on the screen.
The pipe
function receives:
conformedValue
config
The conformedValue
is the value that the user entered after it has been conformed.
The config
is an object that contains all the user configurations for the component (the ones detailed on this page).
The pipe
function must return one of the following: false
, string
, or object
.
Return false
to reject the new conformed value and keep the input field from changing.
If the pipe
modifies the string without adding new characters, for example, changing letter capitalization or removing characters, it should return the modified string.
If the pipe
adds new characters to the string, it must return an object with the following keys:
value
: the new stringindexesOfPipedChars
: array of integers, which contains the indexes of all the characters that were added by thepipe
to the conformed value
For an example of a pipe, see the code for
createAutoCorrectedDatePipe
which is a Text Mask addon.
placeholderChar
The placeholder character represents the fillable spot in the mask.
It is set to _
(underscore) by default.
For example, with mask...
['(', /[1-9]/, /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]
...the user would fill out (___) ___-____
.
You can pass a different placeholder character. For example, the unicode character U+2000
would
make the mask above look like ( ) -
.
In JavaScript, you would pass such unicode character as '\u2000'
.
Note: you cannot use a mask that has a placeholder character hard-coded in it. That
is, since the default placeholder character is _
, you cannot have a mask that looks like
_111_
unless you pass placeholderChar
that is not _
and doesn't exist
in your mask.
keepCharPositions
keepCharPositions
changes the general behavior of the Text Mask component.
It is set to false
by default,
showMask
showMask
is a boolean that tells the component to display the mask as a placeholder in place of the regular placeholder when the input element value is empty.
render
For advanced use cases, you can customize the rendering of the resultant <input>
via a render prop.
This is entirely optional.
If no render
prop is passed, a normal <input>
is rendered.
For example, to use with styled-components, which requires an innerRef:
<MaskedInput
mask={['(', /[1-9]/, /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]}
placeholder="Enter a phone number"
id="my-input-id"
render={(ref, props) => (
<MyStyledInput innerRef={ref} {...props} />
)}
/>
const MyStyledInput = styled.input`
background: papayawhip;
`;
Utilities
In addition to the Mask Input component there are additional utility functions that you can utilize, such as:
conformToMask
It is the function that the Masked input component uses to transform text to the given mask.
Importing it
It is included for convenience. So you can import it from the package as follows
import { MaskedInput, conformToMask } from 'react-text-mask';
Using it
conformToMask
accepts three arguments:
- text (string) (required)
- mask (array) (required)
- config (object) (optional)
config
is these values.
The linked variable names have similar names to properties that are described above in this document. So you can learn what each one is for by reading the documentation above.
The return value of conformToMask
is an object with the following shape:
{
"conformedValue": "(123) 123-1234",
"meta": {
"someCharsRejected": false
}
}
So, one way to use conformToMask
could be as follows:
const phoneNumber = '5551234444'
const phoneNumberMask = ['(', /[1-9]/, /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]
const conformedPhoneNumber = conformToMask(
phoneNumber,
phoneNumberMask,
{guide: false}
)
console.log(conformedPhoneNumber.conformedValue) // prints (555) 123-4444
Add ons
You can easily expand the base functionality of React Text Mask with addons for more mask types. Checkout existing addons.
Contributing
We would love some contributions! Check out this document to get started.