How to create a Speed-O-Meter with Needle Gauge Chart in Chart.js

How to create a Speed-O-Meter with Needle Gauge Chart in Chart.js

00:02 Creating a speedometer with needle gauge in Chart.js
02:15 Converting a bar chart to a doughnut chart with adjustments
06:27 Creating a speedometer with 3 colors and a needle gauge.
08:28 Creating a gauge needle block in Chart.js
12:33 Calculate the total from data sets and use array reduce method.
14:42 Calculating the needle value and angle for the Speed-O-Meter
18:38 Creating a circle using ctx.arc
20:36 Calculating the dynamic positioning of the needle on the chart.
24:15 Creating a needle gauge chart with Chart.js
26:08 Creating a gauge chart and drawing the needle
30:07 Understanding the height and rotation in the chart.
31:56 Calculate the top point of the speed-o-meter in Chart.js
35:38 Creating a needle gauge chart with Chart.js
37:30 Creating a Speed-O-Meter with Needle Gauge in Chart.js
41:08 Adjusting and customizing the needle gauge chart in Chart.js
43:01 Getting tooltip items and extracting data values

In this video we will create a speed-o-meter with needle gauge chart in Chart.js. A speed-o-meter chart would track speed or other types of value by pointing it with a needle. Chart.js does not support this out of the box but it is possible to combine certain items together.

With the doughnut chart we can create a gauge chart with some modifications and add a needle to it with canvas. This creates a great speed-o-meter gauge chart.

The topic is quite complicated but we take it slow and make it easy to follow. However, it is worth to learn as this will open up many new doors.

Let's explore this right now!

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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:    • How to use config and setup in a line...  
Starting Code: https://www.chartjs3.com/docs/chart/g...

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