4.0.0-beta.2 • Public • Published

input[type=date] polyfill

NPM version NPM downloads Build Status Coverage Status Twitter

Donate Your help is appreciated. Create a PR, submit a bug or just grab me 🍺

Why another date picker? The problem is that most of existing solutions do not follow standards regarding to value property format, that should have “a valid full-date as defined in [RFC 3339]”. In other words representation of date can vary, but the string value should have yyyy-MM-dd format. It helps to work with such values consistently regarding on the current language.



  • lightweight polyfill with no dependencies
  • works for initial and dynamic content elements
  • normalizes input[type=date] presentation for desktop browsers
  • submitted value always has standards based yyyy-MM-dd [RFC 3339] format
  • placeholder attribute works as expected
  • it's possible to change displayed date value format
  • you are able to control where to apply the polyfill
  • keyboard and accessibility friendly


$ npm install better-dateinput-polyfill

Then append the following scripts to your page:

<script src="node_modules/better-dateinput-polyfill/dist/better-dateinput-polyfill.js"></script>

Forcing the polyfill

Sometimes it's useful to override browser implemetation with the consistent control implemented by the polyfill. To suppress feature detection you can add <meta name="dateinput-polyfill-media"> into your document <head>. Value of content attribute is a media query where polyfill will be applied:

<!-- force polyfill everywhere -->
<meta name="dateinput-polyfill-media" content="screen">
<!-- force polyfill only on mobile devices in portrait mode-->
<meta name="dateinput-polyfill-media" content="screen and (orientation: portrait)">

Change default date presentation format

When no spicified polyfill uses browser settings to format displayed date. You can override date presentation globally with <meta name="dateinput-polyfill-format"> via content attribute or directly on a HTML element with data-format attribute. Value should be options for the Date#toLocaleString call as a stringified JSON object:

    <!-- Override default date presentation format -->
    <meta name="dateinput-polyfill-format" content='{"month":"long","year":"numeric","day":"numeric"}'>
    <!-- Override date presentation format on a particular element -->
    <input type="date" data-format='{"month":"short","year":"numeric","day":"numeric"}'>


Download git repository and install project dependencies:

$ npm install

The project uses set of ES6 transpilers to compile the output file. Now use command below to start development:

$ npm run watch

After any change file build/better-dateinput-polyfill.js is recompiled automatically.

Browser support


  • Chrome
  • Safari
  • Firefox
  • Opera
  • Edge
  • Internet Explorer 10+


  • iOS Safari 10+
  • Chrome for Android 70+



Package Sidebar


npm i @inventora/better-dateinput-polyfill

Weekly Downloads






Unpacked Size

75 kB

Total Files


Last publish


  • jeremyblalock