chartjs-adapter-date-fns

Overview

This adapter allows the use of date-fns with Chart.js.

Requires Chart.js 2.8.0 or later and date-fns 2.0.0 or later.

Note: once loaded, this adapter overrides the default date-adapter provided in Chart.js (as a side-effect).

Installation

npm

1npm install date-fns chartjs-adapter-date-fns --save

1import { Chart } from 'chart.js';
2import 'chartjs-adapter-date-fns';

CDN

By default, https://cdn.jsdelivr.net/npm/chartjs-adapter-date-fns returns the latest (minified) version, however it's highly recommended to always specify a version in order to avoid breaking changes. This can be achieved by appending @{version} to the url:

1<script src="https://cdn.jsdelivr.net/npm/chart.js/dist/chart.min.js"></script>
2<script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-date-fns/dist/chartjs-adapter-date-fns.bundle.min.js"></script>

Read more about jsDeliver versioning on their website.

Configuration

Locale support via scale options

date-fns requires a date-fns locale object to be tagged on to each format() call, which requires the locale to be explicitly set via the adapters.date option: Chart.js documentation on adapters.date

For example:

1// import date-fns locale:
2import {de} from 'date-fns/locale';
3
4
5// scale options:
6{
7    adapters: {
8        date: {
9            locale: de
10        }
11    }
12}

Further, read the Chart.js documentation for other possible date/time related options. For example, the time scale time.* options can be overridden using the date-fns tokens.

Development

You first need to install node dependencies (requires Node.js):

1> npm install

The following commands will then be available from the repository root:

1> npm run build         // build dist files
2> npm run lint          // perform code linting

License

chartjs-adapter-date-fns is available under the MIT license.