April 8, 2021

4024 words 19 mins read



Input Mask plugin

repo name RobinHerbots/Inputmask
repo link https://github.com/RobinHerbots/Inputmask
homepage http://robinherbots.github.io/Inputmask
language JavaScript
size (curr.) 57405 kB
stars (curr.) 5432
created 2010-09-20
license MIT License


Copyright (c) 2010 - 2021 Robin Herbots Licensed under the MIT license (https://opensource.org/licenses/MIT)


NPM Version Dependency Status devDependency Status

Inputmask is a javascript library that creates an input mask. Inputmask can run against vanilla javascript, jQuery, and jqlite.

An inputmask helps the user with the input by ensuring a predefined format. This can be useful for dates, numerics, phone numbers, …


  • easy to use
  • optional parts anywhere in the mask
  • possibility to define aliases which hide the complexity
  • date / DateTime masks
  • numeric masks
  • lots of callbacks
  • non-greedy masks
  • many features can be enabled/disabled/configured by options
  • supports read-only/disabled/dir=“rtl” attributes
  • support data-inputmask attribute(s)
  • alternator-mask
  • regex-mask
  • dynamic-mask
  • preprocessing-mask
  • JIT-masking
  • value formatting / validating without input element
  • AMD/CommonJS support
  • dependencyLibs: vanilla javascript, jQuery, jqlite
  • <input-mask> htmlelement

Demo page see https://robinherbots.github.io/Inputmask/

Thanks to Jetbrains for providing a free license for their excellent Webstorm IDE.

Thanks to Browserstack for providing a free license, so we can start automating test in different browsers and devices.



Inputmask can run against different javascript libraries. You can choose between:

  • inputmask.dependencyLib (vanilla)
  • inputmask.dependencyLib.jquery

Classic web with <script> tag

Include the js-files which you can find in the dist folder.

Inputmask with jQuery as dependencylib.

<script src="jquery.js"></script>
<script src="dist/jquery.inputmask.js"></script>

Inputmask with vanilla dependencylib.

<script src="dist/inputmask.js"></script>

If you like to automatically bind the inputmask to the inputs marked with the data-inputmask- … attributes you may also want to include the inputmask.binding.js

<script src="dist/bindings/inputmask.binding.js"></script>


Install the package

npm install inputmask --save
Install the latest beta version
npm install inputmask@next --save

In your modules

If you want to include the Inputmask and all extensions.

var Inputmask = require('inputmask');

import Inputmask from "inputmask";


via Inputmask class

var selector = document.getElementById("selector");

var im = new Inputmask("99-9999999");


Inputmask({"mask": "(999) 999-9999", ... other_options, ...}).mask(selector);
Inputmask("9", { repeat: 10 }).mask(selector);

Inputmask({ regex: "\\d*" }).mask(selector);
Inputmask({ regex: String.raw`\d*` }).mask(selector);

via jquery plugin

  $(selector).inputmask("99-9999999");  //static mask
  $(selector).inputmask({"mask": "(999) 999-9999"}); //specifying options
  $(selector).inputmask("9-a{1,3}9{1,3}"); //mask with dynamic syntax

via data-inputmask attribute

<input data-inputmask="'alias': 'datetime'" />
<input data-inputmask="'mask': '9', 'repeat': 10, 'greedy' : false" />
<input data-inputmask="'mask': '99-9999999'" />

Any option can also be passed through the use of a data attribute. Use data-inputmask-<the name of the option>=“value”

<input id="example1" data-inputmask-clearmaskonlostfocus="false" />
<input id="example2" data-inputmask-regex="[a-za-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?" />

via <input-mask> element

Use the input-mask element in your HTML code and set the options as attributes.

<input-mask alias="currency"></input-mask>

Allowed HTML-elements

  • <input type="text">
  • <input type="search">
  • <input type="tel">
  • <input type="url">
  • <input type="password">
  • <div contenteditable="true"> (and all others supported by contenteditable)
  • <textarea>
  • any html-element (mask text content or set maskedvalue with jQuery.val)

The allowed input types are defined in the supportsInputType option. Also see (input-type-ref)

Default masking definitions

  • 9 : numeric
  • a : alphabetical
  • * : alphanumeric

There are more definitions defined within the extensions.You can find info within the js-files or by further exploring the options.


When your new mask is acting strange and replaces some static chars with the mask, then there is a definition that uses the char as a symbol. To solve this you need to double escape the char.

Masking types

Static masks

These are the very basics of masking. The mask is defined and will not change during the input.

  $(selector).inputmask("aa-9999");  //static mask
  $(selector).inputmask({mask: "aa-9999"});  //static mask

Optional masks

It is possible to define some parts in the mask is optional. This is done by using [ ].


$('#test').inputmask('(99) 9999[9]-9999');

This mask will allow input like (99) 99999-9999 or (99) 9999-9999.

Input => 12123451234 mask => (12) 12345-1234 (trigger complete) Input => 121234-1234 mask => (12) 1234-1234 (trigger complete) Input => 1212341234 mask => (12) 12341-234_ (trigger incomplete)


As an extra, there is another configurable character which is used to skip an optional part in the mask.

skipOptionalPartCharacter: " "

Input => 121234 1234 mask => (12) 1234-1234 (trigger complete)

When clearMaskOnLostFocus: true is set in the options (default), the mask will clear out the optional part when it is not filled in, and this only in case the optional part is at the end of the mask.

For example, given:


While the field has focus and is blank, users will see the full mask ___-___. When the required part of the mask is filled and the field loses focus, the user will see 123. When both the required and optional parts of the mask are filled out and the field loses focus, the user will see 123-ABC.

Optional masks with greedy false

When defining an optional mask together with the greedy: false option, the inputmask will show the smallest possible mask as input first.

$(selector).inputmask({ mask: "9[-9999]", greedy: false });

The initial mask shown will be “_” instead of “_-____”.

Dynamic masks

Dynamic masks can change during input. To define a dynamic part use { }.

{n} => n repeats {n|j} => n repeats, with j jitmasking {n,m} => from n to m repeats {n,m|j} => from n to m repeats, with j jitmasking

Also {+} and {*} is allowed. + start from 1 and * start from 0.

  $(selector).inputmask("aa-9{4}");  //static mask with dynamic syntax
  $(selector).inputmask("aa-9{1,4}");  //dynamic mask ~ the 9 def can be occur 1 to 4 times

  //email mask
    mask: "*{1,20}[.*{1,20}][.*{1,20}][.*{1,20}]@*{1,20}[.*{2,6}][.*{1,2}]",
    greedy: false,
    onBeforePaste: function (pastedValue, opts) {
      pastedValue = pastedValue.toLowerCase();
      return pastedValue.replace("mailto:", "");
    definitions: {
      '*': {
        validator: "[0-9A-Za-z!#$%&'*+/=?^_`{|}~\-]",
        casing: "lower"
  //decimal mask
   Inputmask("(.999){+|1},00", {
        positionCaretOnClick: "radixFocus",
        radixPoint: ",",
        _radixDance: true,
        numericInput: true,
        placeholder: "0",
        definitions: {
            "0": {
                validator: "[0-9\uFF11-\uFF19]"

Alternator masks

The alternator syntax is like an OR statement. The mask can be one of the 3 choices specified in the alternator.

To define an alternator use the |. ex: “a|9” => a or 9 “(aaa)|(999)” => aaa or 999 “(aaa|999|9AA)” => aaa or 999 or 9AA

Also make sure to read about the keepStatic option.

$("selector").inputmask("(99.9)|(X)", {
  definitions: {
    "X": {
      validator: "[xX]",
      casing: "upper"


  mask: ["99.9", "X"],
  definitions: {
    "X": {
      validator: "[xX]",
      casing: "upper"

Preprocessing masks

You can define the mask as a function that can allow you to preprocess the resulting mask. Example sorting for multiple masks or retrieving mask definitions dynamically through ajax. The preprocessing fn should return a valid mask definition.

$(selector).inputmask({ mask: function () { /* do stuff */ return ["[1-]AAA-999", "[1-]999-AAA"]; }});

JIT Masking

Just in time masking. With the jitMasking option, you can enable jit masking. The mask will only be visible for the user-entered characters. Default: false

Value can be true or a threshold number or false.

Inputmask("datetime", { jitMasking: true }).mask(selector);

Define custom definitions

You can define your own definitions to use in your mask.Start by choosing a masksymbol.

validator(chrs, maskset, pos, strict, opts)

Next, define your validator. The validator can be a regular expression or a function.

The return value of a validator can be true, false, or a command object.

Options of the command object

  • pos : position to insert

  • c : character to insert

  • caret : position of the caret

  • remove : position(s) to remove

    • pos or [pos1, pos2]
  • insert : position(s) to add :

    • { pos : position to insert, c : character to insert, fromIsValid : true/false, strict : true/false }
    • [{ pos : position to insert, c : character to insert, fromIsValid : true/false, strict : true/false }, { …}, … ]

    fromIsValid & strict defaults to true.

  • refreshFromBuffer :

    • true => refresh validPositions from the complete buffer
    • { start: , end: } => refresh from start to end
  • rewritePosition: rewrite the maskPos within the isvalid function
    See preValidation option


When you insert or delete characters, they are only shifted when the definition type is the same. This behavior can be overridden by giving a definitionSymbol. (see example x, y, z, which can be used for IP-address masking, the validation is different, but it is allowed to shift the characters between the definitions)

  'f': {  //masksymbol
    "validator": "[0-9\(\)\.\+/ ]"
  'g': {
    "validator": function (chrs, buffer, pos, strict, opts) {
      //do some logic and return true, false, or { "pos": new position, "c": character to place }
  'j': { //basic year
    validator: "(19|20)\\d{2}"
  'x': {
    validator: "[0-2]",
    definitionSymbol: "i" //this allows shifting values from other definitions, with the same masksymbol or definitionSymbol
  'y': {
    validator: function (chrs, buffer, pos, strict, opts) {
      var valExp2 = new RegExp("2[0-5]|[01][0-9]");
      return valExp2.test(buffer[pos - 1] + chrs);
    definitionSymbol: "i"
  'z': {
    validator: function (chrs, buffer, pos, strict, opts) {
      var valExp3 = new RegExp("25[0-5]|2[0-4][0-9]|[01][0-9][0-9]");
      return valExp3.test(buffer[pos - 2] + buffer[pos - 1] + chrs);
    definitionSymbol: "i"


Specify a placeholder for a definition. This can also be a function.

set defaults

The defaults can be set as below.

  'autoUnmask': true
  'A': {
    validator: "[A-Za-z\u0410-\u044F\u0401\u0451\u00C0-\u00FF\u00B5]",
    casing: "upper" //auto uppercasing
  '+': {
    validator: "[0-9A-Za-z\u0410-\u044F\u0401\u0451\u00C0-\u00FF\u00B5]",
    casing: "upper"
  'numeric': {
    mask: "r",
    greedy: false,

But if the property is defined within an alias you need to set it for the alias definition. This is also for default plugin options. If the alias definitions extend on default options, you can only override it at alias level.

  'numeric': {
    autoUnmask: true,
    allowPlus: false,
    allowMinus: false

However, the preferred way to alter properties for an alias is by creating a new alias that inherits from the default alias definition.

  'myNum': {
    alias: "numeric",
    placeholder: '',
    allowPlus: false,
    allowMinus: false

Once defined, you can call the alias by:


All callbacks are implemented as options. This means that you can set general implementations for the callbacks by setting a default.

  onKeyValidation: function(key, result){
    if (!result){
      alert('Your input is not valid')



Create a mask for the input.

$(selector).inputmask({ mask: "99-999-99"});


Inputmask({ mask: "99-999-99"}).mask(document.querySelectorAll(selector));




var im = new Inputmask("99-999-99");




Get the unmaskedvalue



var input = document.getElementById(selector);
if (input.inputmask)

Value unmasking

Unmask a given value against the mask.

var unformattedMask = Inputmask.unmask("123-45678-90", { mask: "999-99999-99" }); //1234567890
var unformattedDate = Inputmask.unmask("23/03/1973", { alias: "datetime", inputFormat: "dd/mm/yyyy", outputFormat: "ddmmyyyy"});//23031973


Remove the inputmask.



var input = document.getElementById(selector);
if (input.inputmask)




return the default (empty) mask value

  var initialValue = $("#test").inputmask("getemptymask");  // initialValue  => "___-___"


Check whether the returned value is masked or not; currently only works reliably when using jquery.val fn to retrieve the value

  function validateMaskedValue(val){}
  function validateValue(val){}

  var val = $("#test").val();
  if ($("#test").inputmask("hasMaskedValue"))


Verify whether the current value is complete or not.

  if ($(selector).inputmask("isComplete")){
    //do something


The metadata of the actual mask provided in the mask definitions can be obtained by calling getmetadata. If only a mask is provided the mask definition will be returned by the getmetadata.



The setvalue functionality is to set a value to the inputmask like you would do with jQuery.val, BUT it will trigger the internal event used by the inputmask always, whatever the case. This is particular usefull when cloning an inputmask with jQuery.clone. Cloning an inputmask is not a fully functional clone. On the first event (mouseenter, focus, …) the inputmask can detect if it were cloned and can reactivate the masking. However when setting the value with jQuery.val there is none of the events triggered in that case. The setvalue functionality does this for you.

$(selector).inputmask("setvalue", value);

var selector = document.getElementById("selector");

Inputmask.setValue(selector, value);

option(options, noremask)

Get or set an option on an existing inputmask. The option method is intented for adding extra options like callbacks, etc at a later time to the mask.

When extra options are set the mask is automatically reapplied, unless you pas true for the noremask argument.

Set an option

  onBeforePaste: function (pastedValue, opts) {
    return phoneNumOnPaste(pastedValue, opts);
$("#CellPhone").inputmask("option", {
  onBeforePaste: function (pastedValue, opts) {
    return phoneNumOnPaste(pastedValue, opts);


Instead of masking an input element, it is also possible to use the inputmask for formatting given values. Think of formatting values to show in jqGrid or on other elements then inputs.

var formattedDate = Inputmask.format("2331973", { alias: "datetime", inputFormat: "dd/mm/yyyy"});


Validate a given value against the mask.

var isValid = Inputmask.isValid("23/03/1973", { alias: "datetime", inputFormat: "dd/mm/yyyy"});



Change the mask placeholder. Default: “_”

Instead of “_”, you can change the unfilled characters mask as you like, simply by adding the placeholder option. For example, placeholder: " " will change the default autofill with empty values

  $("#date").inputmask("99/99/9999",{ "placeholder": "*" });

or a multi-char placeholder

  $("#date").inputmask("99/99/9999",{ "placeholder": "dd/mm/yyyy" });


Definition of the symbols used to indicate an optional part in the mask.

optionalmarker: { start: "[", end: "]" }


Definition of the symbols used to indicate a quantifier in the mask.

quantifiermarker: { start: "{", end: "}" }


Definition of the symbols used to indicate a group in the mask.

groupmarker: { start: "(", end: ")" }


Definition of the symbols used to indicate an alternator part in the mask.

alternatormarker: "|"


Definition of the symbols used to escape a part in the mask.

escapeChar: "\\"

See escape special mask chars


The mask to use.

Inputmask({ mask: "9{*}").mask(selector);


Use a regular expression as a mask

Inputmask({ regex: "[0-9]*" }).mask(selector);

When using shorthands be aware that you need to double escape or use String.raw with a string literal.

Inputmask({ regex: "\\d*" }).mask(selector);
Inputmask({ regex: String.raw`\d*` }).mask(selector);


Execute a function when the mask is completed

  $("#date").inputmask("99/99/9999",{ "oncomplete": function(){ alert('inputmask complete'); } });


Execute a function when the mask is incomplete. Executes on blur.

  $("#date").inputmask("99/99/9999",{ "onincomplete": function(){ alert('inputmask incomplete'); } });


Execute a function when the mask is cleared.

  $("#date").inputmask("99/99/9999",{ "oncleared": function(){ alert('inputmask cleared'); } });


Mask repeat function. Repeat the mask definition x-times.

  $("#number").inputmask({ "mask": "9", "repeat": 10 });  // ~ mask "9999999999"


Default: false Toggle to allocate as much possible or the opposite. Non-greedy repeat function.

  $("#number").inputmask({ "mask": "9", "repeat": 10, "greedy": false });  // ~ mask "9" or mask "99" or ... mask "9999999999"

With the non-greedy option set to false, you can specify * as repeat. This makes an endless repeat.


Automatically unmask the value when retrieved.Default: false.

When setting this option to true the plugin also expects the initial value from the server to be unmasked.


Remove the mask before submitting the form.Default: false


Remove the empty mask on blur or when not empty remove the optional trailing part Default: true

  $("#ssn").inputmask("999-99-9999",{placeholder:" ", clearMaskOnLostFocus: true }); //default


Toggle to insert or overwrite input.Default: true.This option can be altered by pressing the Insert key.


Show selected caret when insertmode = false.


Clear the incomplete input on blur

  $("#date").inputmask("99/99/9999",{ "clearIncomplete": true });


Definitions of aliases.

With an alias, you can define a complex mask definition and call it by using an alias name. So this is mainly to simplify the use of your masks. Some aliases found in the extensions are email, currency, decimal, integer, date, DateTime, dd/mm/yyyy, etc.

First, you have to create an alias definition. The alias definition can contain options for the mask, custom definitions, the mask to use, etc.

When you pass in an alias, the alias is first resolved and then the other options are applied. So you can call an alias and pass another mask to be applied over the alias. This also means that you can write aliases that “inherit” from another alias.

Some examples can be found in jquery.inputmask.xxx.extensions.js




$("#date").inputmask({ alias: "datetime"});

You can also call an alias and extend it with some more options

$("#date").inputmask("datetime", { "clearIncomplete": true });


$("#date").inputmask({ alias: "datetime", "clearIncomplete": true });


The alias to use.

$("#date").inputmask({ alias: "email"});


Callback to implement autocomplete on certain keys for example

Function arguments: event, buffer, caretPos, optsFunction return:


Executes before masking the initial value to allow preprocessing of the initial value.

Function arguments: initialValue, optsFunction return: processedValue

  alias: 'phonebe',
  onBeforeMask: function (value, opts) {
    var processedValue = value.replace(/^0/g, "");
    if (processedValue.indexOf("32") > 1 ||     processedValue.indexOf("32") == -1) {
      processedValue = "32" + processedValue;

    return processedValue;


This callback allows for preprocessing the pasted value before actually handling the value for masking. This can be useful for stripping away some characters before processing.

Function arguments: pastedValue, optsFunction return: processedValue

  mask: '9999 9999 9999 9999',
  placeholder: ' ',
  showMaskOnHover: false,
  showMaskOnFocus: false,
  onBeforePaste: function (pastedValue, opts) {
    var processedValue = pastedValue;

    //do something with it

    return processedValue;

You can also disable pasting a value by returning false in the onBeforePaste call.

Default: Calls the onBeforeMask


Executes before writing to the masked element

Use this to do some extra processing of the input. This can be useful when implementing an alias, ex. decimal alias, autofill the digits when leaving the inputfield.

Function arguments: event, buffer, caretPos, optsFunction return: command object (see Define custom definitions)


Executes after unmasking to allow post-processing of the unmaskedvalue.

Function arguments: maskedValue, unmaskedValueFunction return: processedValue

  $("#number").inputmask("decimal", { onUnMask: function(maskedValue, unmaskedValue) {
    //do something with the value
    return unmaskedValue;


Shows the mask when the input gets focus. (default = true)

  $("#ssn").inputmask("999-99-9999",{ showMaskOnFocus: true }); //default

To make sure no mask is visible on focus also set the showMaskOnHover to false. Otherwise hovering with the mouse will set the mask and will stay on focus.


Shows the mask when hovering the mouse. (default = true)

  $("#ssn").inputmask("999-99-9999",{ showMaskOnHover: true }); //default


Callback function is executed on every keyvalidation with the key, result as the parameter.

  $("#ssn").inputmask("999-99-9999", {
    onKeyValidation: function (key, result) {
      console.log(key + " - " + result);



Numeric input direction. Keeps the caret at the end.

  $(selector).inputmask('€ 999.999.999,99', { numericInput: true });    //123456  =>  € ___.__1.234,56


Align the input to the right

By setting the rightAlign you can specify to right-align an inputmask. This is only applied in combination op the numericInput option or the dir-attribute. The default is true.

  $(selector).inputmask('decimal', { rightAlign: false });  //disables the right alignment of the decimal input


Make escape behave like undo. (ctrl-Z)Pressing escape reverts the value to the value before focus.Default: true

radixPoint (numerics)

Define the radixpoint (decimal separator)Default: ""

groupSeparator (numerics)

Define the groupseparatorDefault: ""


Default: null (~false) Use in combination with the alternator syntax Try to keep the mask static while typing. Decisions to alter the mask will be postponed if possible.

ex. $(selector).inputmask({ mask: ["+55-99-9999-9999", “+55-99-99999-9999”, ], keepStatic: true });

typing 1212345123 => should result in +55-12-1234-5123 type extra 4 => switch to +55-12-12345-1234

When the option is not set, it will default to false, except for multiple masks it will default to true!!


When enabled the caret position is set after the latest valid position on TAB Default: true


Allows for tabbing through the different parts of the masked field.Default: false


Pass custom definitions directly in the options.

			mask: "V{13}9{4}",
			definitions: {
				"V": {
					validator: "[A-HJ-NPR-Za-hj-npr-z\\d]",
					casing: "upper"
			clearIncomplete: true,
			autoUnmask: true


With this call-in (hook) you can override the default implementation of the isComplete function.Args => buffer, opts Return => true|false

  regex: "[0-9]*",
  isComplete: function(buffer, opts) {
    return new RegExp(opts.regex).test(buffer.join(''));


Hook to postValidate the result from isValid. Usefull for validating the entry as a whole. Args => buffer, pos, c, currentResult, opts, maskset, strict, fromCheckvalReturn => true|false|command object


Hook to preValidate the input. Useful for validating regardless of the definition. Args => buffer, pos, char, isSelection, opts, maskset, caretPos, strict => return true/false/command object When returning true, the normal validation kicks in, otherwise, it is skipped.

When returning a command object the actions are executed and further validation is stopped.
If you want to continue further validation, you need to add the rewritePosition action.


The staticDefinitionSymbol option is used to indicate that the static entries in the mask can match a certain definition. Especially useful with alternators so that the static element in the mask can match another alternation.

In the example below, we mark the spaces as a possible match for the “i” definition. By doing so the mask can alternate to the second mask even when we typed already “12 3”.

Inputmask("(99 99 999999)|(i{+})", {
  definitions: {
    "i": {
      validator: ".",
      definitionSymbol: "*"
  staticDefinitionSymbol: "*"


Return nothing when the user hasn’t entered anything. Default: true


Disable value property patching Default: false


Positioning of the caret on click.


  • none
  • lvp (based on the last valid position (default)
  • radixFocus (position caret to radixpoint on initial click)
  • select (select the whole input)
  • ignore (ignore the click and continue the mask)

Default: “lvp”


Apply casing at the mask-level. Options: null, “upper”, “lower” or “title” or callback args => elem, test, pos, validPositions return charValue

casing: function(elem, test, pos, validPositions) {
	do some processing || upper/lower input property in the validPositions
	return elem; //upper/lower element

Default: null


Default: “text”
The inputmode hints at the type of data that might be entered by the user while editing the element or its contents.



Specify to use the data-inputmask attributes or to ignore them.

If you don’t use data attributes you can disable the import by specifying importDataAttributes: false.

Default: true


Alter the behavior of the char shifting on entry or deletion.

In some cases shifting the mask entries or deletion should be more restrictive.
Ex. date masks. Shifting month to day makes no sense

Default: true

true = shift on the “def” match false = shift on the “nativeDef” match


Use the default defined definitions from the prototype.

Default: true


Time to show html5 validation error on form submit.

Default: 3000


set a value and apply the mask

this can be done with the traditional jquery.val function (all browsers) or JavaScript value property for browsers which implement lookupGetter or getOwnPropertyDescriptor


  var number = document.getElementById("number");
  number.value = 12345;

with the autoUnmaskoption you can change the return of $.fn.val (or value property) to unmaskedvalue or the maskedvalue

  $('#<%= tbDate.ClientID%>').inputmask({ "mask": "99/99/9999", 'autoUnmask' : true});    //  value: 23/03/1973
  alert($('#<%= tbDate.ClientID%>').val());    // shows 23031973     (autoUnmask: true)

  var tbDate = document.getElementById("<%= tbDate.ClientID%>");
  alert(tbDate.value);    // shows 23031973     (autoUnmask: true)

escape special mask chars

If you want a mask element to appear as a static element you can escape them by \

  $("#months").inputmask("m \\months");

Extra example see https://github.com/RobinHerbots/Inputmask/issues/2251

auto-casing inputmask

You can define within a definition to automatically apply some casing on the entry in input by giving the casing.Casing can be null, “upper”, “lower” or “title”.

  'A': {
    validator: "[A-Za-z]",
    casing: "upper" //auto uppercasing
  '+': {
    validator: "[A-Za-z\u0410-\u044F\u0401\u04510-9]",
    casing: "upper"

Include jquery.inputmask.extensions.js for using the A and # definitions.

  $("#test").inputmask("999-AAA");    //   => 123abc ===> 123-ABC

Supported markup options

RTL attribute

<input id="test" dir="rtl" />

readonly attribute

<input id="test" readonly="readonly" />

disabled attribute

<input id="test" disabled="disabled" />

maxlength attribute

<input id="test" maxlength="4" />

data-inputmask attribute

You can also apply an inputmask by using the data-inputmask attribute. In the attribute, you specify the options wanted for the inputmask. This gets parsed with $.parseJSON (for the moment), so be sure to use a well-formed JSON-string without the {}.

<input data-inputmask="'alias': 'datetime'" />
<input data-inputmask="'mask': '9', 'repeat': 10, 'greedy' : false" />

data-inputmask-<option> attribute

All options can also be passed through data-attributes.

<input data-inputmask-mask="9" data-inputmask-repeat="10" data-inputmask-greedy="false" />


When cloning a inputmask, the inputmask reactivates on the first event (mouseenter, focus, …) that happens to the input. If you want to set a value on the cloned inputmask and you want to directly reactivate the masking you have to use $(input).inputmask(“setvalue”, value)

Be sure to pass true in the jQuery.clone fn to clone with data and events and use jQuery as dependencyLib (https://api.jquery.com/clone/)

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