Awesome

Aeon

A lightweight date time picker built with web components that can be used anywhere

No dependencies 🌞 - a standalone vanilla JS web component
Lightweight 🌱 - 5kb gzipped
Use anywhere 🌍 - use standalone or directly in your framework of choice with no wrappers
Progressive enhancement 🥞 - if the code fails to load, fallbacks to a native picker or a simple text box
Accessible 👨‍👩‍👧‍👦‍ - works with mouse/touch/keyboard/screen readers and behaves as a native form element
Locale aware 🇺🇳 - uses the browser locale language and date format by default
Themeable 🎨 - pass in custom colour schemes
Browser support 🖥 - works in all modern browsers on all devices (and IE11 - with polyfills)

Examples
Motivation
Install
Usage
Options
API
Theming
Contributions
Author
License

Examples

A basic example
Same example with IE11 support
Storybook - experiment with all the options

Motivation

I needed a progressively enhanced, lightweight date and time picker that functioned and looked consistent across all browsers, and that worked with or without a framework. The difference in support (no native picker on desktop Safari 👀) style and behaviour of native pickers rule them out, so web components seemed an obvious choice. The existing web component solutions tended to be too heavyweight, so Aeon was born.

Install

Install using npm:

npm install --save @lamplightdev/aeon

or reference directly:

<script src="https://unpkg.com/@lamplightdev/aeon">

Usage

If you're using ESM modules - just import Aeon directly into your code:

// if you're using a bundler that resolves node_modules
import '@lamplightdev/aeon';

// if you're using a bundler that doesn't resove node_modules
import 'path/to/node_modules/@lamplightdev/aeon/src/aeon.js';

Alternatively include Aeon in a script tag:

<script type="module" src="https://unpkg.com/@lamplightdev/aeon"></script>

<!-- or for the ES5 version -->

<script src="https://unpkg.com/@lamplightdev/aeon/dist/aeon-es5.js"></script>

Then use the <aeon-datepicker> tag in your HTML wrapping a date input and optionally a time input to include a time picker too:

<label for="date">Start date</label>

<aeon-datepicker>
  <input type="date" id="date" name="date" value="2020-03-20" />
</aeon-datepicker>

<aeon-datepicker>
  <input type="date" id="date" name="date" value="2020-03-20" />
  <input type="time" id="time" name="time" value="05:19" />
</aeon-datepicker>

Initial values can be set directly on the wrapped date and time inputs.
On selecting a date with the picker the component will update the wrapped date and time inputs with the selected values (YYYY-MM-DD and HH:mm respectively), so you can add Aeon to an existing form with no glue code necessary.
Alternatively retrieve the values directly from the <aeon-datepicker> element or listen for changes (see API).
If the web component fails to load for whatever reason, the page will still display the native date and time elements if available, or a standard text input if not. Progressive enhancement FTW.

IE11

If you need to support IE11, you'll need to use the es5 version of the script and a few polyfills. See the ES5 example for a working implementation, but at a minimum you'll need the following in the document <head>:

<!-- include the general polyfills needed -->
<script
  crossorigin="anonymous"
  src="https://polyfill.io/v3/polyfill.min.js?features=Array.prototype.find%2CArray.prototype.includes%2CString.prototype.padStart"
></script>

<!-- include the web component polyfills needed -->
<script src="https://unpkg.com/@webcomponents/webcomponentsjs@%5E2/webcomponents-loader.js"></script>

<script>
  window.WebComponents = window.WebComponents || {
    waitFor: function(cb) {
      addEventListener('WebComponentsReady', cb);
    }
  };

  WebComponents.waitFor(function() {
    // when the web component polyfill is loaded
    // load the script
    var head = document.getElementsByTagName('head')[0];
    var script = document.createElement('script');
    script.src = './dist/aeon-es5.js';
    head.appendChild(script);

    // if you want to theme the components, add the custom property here
    window.ShadyCSS &&
      window.ShadyCSS.styleDocument({ '--aeon-rgb': '170, 10, 10' });
  });
</script>

Options

All Aeon options can be set declaratively as attributes on the <aeon-datepicker> tag, or set imperatively in code:

<label for="date-start">Start Date</label>

<aeon-datepicker
  id="datepicker"
  locale="en-us"
  default-date="2020-01-01"
  default-time="09:30"
>
  <input
    id="date-start"
    name="date-start"
    type="date"
    value="2020-04-06"
    placeholder="Start date"
  />
  <input id="time-start" name="time-start" type="time" value="12:00" />
</aeon-datepicker>

<script>
  document.querySelector('#datepicker').locale = 'es';
</script>

Experiment with all options in the Storybook

Attribute	Property	Property type	Default	Description
default-date	defaultDate	String	[now]	If no value is set on the date input, the date shown in the date picker when opened, format `YYYY-MM-DD`
default-time	defaultTime	String	[now]	If no value is set on the time input, the time shown in the date picker when opened,format `HH:mm`
start-day	startDay	Number	`1` (Monday)	Which day to start the week with in the calendar (0 - Sunday, 1 - Monday, etc.)
start-year	startYear	Number	current year - 100	The earliest year to show in the year dropdown
end-year	endYear	Number	current year + 5	The latest year to show in the year dropdown
locale	locale	String	browser default	The locale - this affects the language of the months and days as well as the format of the date and time shown - the format can be further configured using `dateStyle`
confirm-on-date	confirmOnDate	Boolean	`false`	If `true` and this is a date input only (no time input) then when a date is selected in the picker will close and the date will be updated
use-native	useNative	Boolean	`false`	If `true`, use the browser native inputs for date and time where available
date-style	dateStyle	Object	locale default	An object that controls how the date and time are shown - see note below

dateStyle

The date style object is passed as the options parameter to the Intl.DateTimeFormat constructor to control the formatting of the displayed date and time.

When setting as an attribute (date-style) this must be a JSON stringified value:

<aeon-datepicker date-style='{"month":"long"}'>
  <input type="date" />
</aeon-datepicker>

API

The value property is an object containing two fields, date (YYYY-MM-DD) and time (HH:mm) of the currently selected date and time:

console.log(document.querySelector('aeon-datepicker').value);
/*
  logs:
  {
    date: '2020-03-20',
    time: '13:56
  }
*/
});

A change event is dispatched when a new date has been selected:

document.querySelector('aeon-datepicker').addEventListener('change', event => {
  console.log(event.target.value);

  /*
  logs:
  {
    date: '2020-03-20',
    time: '13:56
  }
  */
});

Theming

The foreground and background colours of the date picker can be configured using CSS custom properties. --aeon-rgb can be set to the RGB values of the foreground colour, while --aeon-bgRgb is used for the background colour.

These can be set for all components on the page by setting these properties on the :root element:

:root {
  --aeon-rgb: 255, 255, 255;
  --aeon-bgRgb: 0, 0, 0;
}

or individually on each component either in a CSS rule or inline:

<aeon-datepicker style="--aeon-rgb: 255, 255, 255; --aeon-bgRgb: 0, 0, 0;">
  <input type="date" id="date" name="date" value="2020-03-20" />
</aeon-datepicker>

Contributions

Any contributions welcome!

Author

Made by @lamplightdev, lamplightdev.com

License

MIT License