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chartjs-adapter-date-fns
Advanced tools
Chart.js adapter to use date-fns for time functionalities
The chartjs-adapter-date-fns package is an adapter for Chart.js that allows you to use date-fns for date manipulation and formatting. This package is particularly useful for handling time series data in Chart.js, providing a seamless way to format dates and times on your charts.
Date Formatting
This feature allows you to format dates on the x-axis of a Chart.js chart using date-fns. The code sample demonstrates how to set up a line chart with dates parsed and formatted using date-fns.
const Chart = require('chart.js');
const dateFns = require('date-fns');
const adapter = require('chartjs-adapter-date-fns');
const config = {
type: 'line',
data: {
labels: [
dateFns.parseISO('2023-01-01'),
dateFns.parseISO('2023-02-01'),
dateFns.parseISO('2023-03-01')
],
datasets: [{
label: 'Sample Data',
data: [10, 20, 30]
}]
},
options: {
scales: {
x: {
type: 'time',
time: {
unit: 'month'
}
}
}
}
};
const ctx = document.getElementById('myChart').getContext('2d');
new Chart(ctx, config);
Custom Date Parsing
This feature allows you to use custom date parsing logic with date-fns. The code sample shows how to set up a line chart where the dates are parsed using a custom parser function that utilizes date-fns.
const Chart = require('chart.js');
const dateFns = require('date-fns');
const adapter = require('chartjs-adapter-date-fns');
const config = {
type: 'line',
data: {
labels: [
'2023-01-01',
'2023-02-01',
'2023-03-01'
],
datasets: [{
label: 'Sample Data',
data: [10, 20, 30]
}]
},
options: {
scales: {
x: {
type: 'time',
time: {
parser: date => dateFns.parseISO(date),
unit: 'month'
}
}
}
}
};
const ctx = document.getElementById('myChart').getContext('2d');
new Chart(ctx, config);
The chartjs-adapter-moment package is an adapter for Chart.js that allows you to use Moment.js for date manipulation and formatting. It provides similar functionalities to chartjs-adapter-date-fns but uses Moment.js instead of date-fns. Moment.js is known for its comprehensive date and time manipulation capabilities, but it is larger in size compared to date-fns.
The chartjs-adapter-luxon package is an adapter for Chart.js that allows you to use Luxon for date manipulation and formatting. Luxon is a modern JavaScript date library that offers a more comprehensive and immutable API compared to date-fns. It is also known for its better support for time zones and internationalization.
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).
npm install date-fns chartjs-adapter-date-fns --save
import { Chart } from 'chart.js';
import 'chartjs-adapter-date-fns';
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:
<script src="https://cdn.jsdelivr.net/npm/chart.js/dist/chart.min.js"></script>
<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.
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:
// import date-fns locale:
import {de} from 'date-fns/locale';
// scale options:
{
adapters: {
date: {
locale: de
}
}
}
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.
You first need to install node dependencies (requires Node.js):
> npm install
The following commands will then be available from the repository root:
> npm run build // build dist files
> npm run lint // perform code linting
chartjs-adapter-date-fns
is available under the MIT license.
FAQs
Chart.js adapter to use date-fns for time functionalities
We found that chartjs-adapter-date-fns demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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