How to Add Data Labels within Bars and Total Sum On Top of Bar Chart in Chart JS

How to Add Data Labels within Bars and Total Sum On Top of Bar Chart in Chart JS

In this video we will explore how to add data labels within bars and total sum on top of bar chart in chart js. With the data labels plugin we can add values within the bar or on top of the bar. However, the moment we want to add it on both locations it is not possible.

This means we will need to have the chartjs-plugin-datalabels and a custom plugin to create the total sum on top of the bar chart. The custom plugin must be able to calculate the sum of the stacked bars and make sure it moves along nicely. We will be using some advanced options and tricks to get this working.

Let's explore how to do this.

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To keep the video short we might expect you to know parts. These parts we have explained in other videos. You can find the references here below:

Understand setup, config and render init blocks: https://youtu.be/pFuibt5HNog
Starting Code: https://www.chartjs3.com/docs/chart/getting-started/

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Creating charts in javascript is very rewarding but extremely challenging. The Chart JS library made it easier to render charts. However the chart js documentation is hard to understand for many. It requires a lot of different moving parts to work along. The canvas tag, javascript, arrays and Chart JS all need to be combined to draw an eye catching bar chart or line chart.

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