Chart.js Axis Labels Orientation Guidelines

Question

Chart.js Axis Labels Orientation Guidelines

I am currently utilizing chart.js within an Angular 8 environment using Primeng. I am looking to customize the options for my chart as follows:

For the y-axis ticks, set textDirection to 'ltr'
For the x-axis ticks, set textDirection to 'rtl'

For instance, I was able to achieve this customization for tooltip by setting textDirection:

 options = {
   tooltips: {
    textDirection: 'rtl', // Setting tooltip text direction to rtl
  }
}

Is there a way to implement similar customizations for my axes?

angular typescript chart.js primeng

Answer 1

Answer №1

I recently faced a similar issue where the date formatting in dd and MMM was getting mixed up, despite configuring the display order as suggested in the documentation. It turns out that ChartJS does not officially support right-to-left (RTL) text direction.

An easy workaround is to directly set the canvas element's dir attribute using a custom plugin. Here's a simple snippet to achieve this:

import { Chart } from 'chart.js'

const RtlChartPlugin = {
  id: 'rtl-chart-plugin',
  beforeDraw: (chart: Chart) => {
    chart.canvas.setAttribute('dir', 'rtl')
  }
}

Chart.register(
  // ...
  RtlChartPlugin
)

Additionally, as a user of timeline axis, I found it necessary to include a displayFormat for better clarity. Here's how you can do it:

time: {
  displayFormats: {
    day: 'dd MMM'
  }
}

While I'm unsure if this issue still persists, I hope this solution proves helpful to others facing a similar challenge.

Answer 2

I recently faced a similar issue where the date formatting in dd and MMM was getting mixed up, despite configuring the display order as suggested in the documentation. It turns out that ChartJS does not officially support right-to-left (RTL) text direction.

An easy workaround is to directly set the canvas element's dir attribute using a custom plugin. Here's a simple snippet to achieve this:

import { Chart } from 'chart.js'

const RtlChartPlugin = {
  id: 'rtl-chart-plugin',
  beforeDraw: (chart: Chart) => {
    chart.canvas.setAttribute('dir', 'rtl')
  }
}

Chart.register(
  // ...
  RtlChartPlugin
)

Additionally, as a user of timeline axis, I found it necessary to include a displayFormat for better clarity. Here's how you can do it:

time: {
  displayFormats: {
    day: 'dd MMM'
  }
}

While I'm unsure if this issue still persists, I hope this solution proves helpful to others facing a similar challenge.

Chart.js Axis Labels Orientation Guidelines

Answer №1

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