Instead, we’re gonna take the easier route and use a JavaScript charting library. Okay, let’s be real: building a JS heatmap from scratch would be a real pain in the you-know-what. Let’s also specify the style of the div to make it stretch over the whole page. We start by making a basic HTML page, complete with a div element to hold our chart. Create an HTML Pageįirst things first, we need to create a web page that’ll hold our super-cool heatmap. We’ll keep things straightforward and easy to understand.

With just four easy-to-follow steps, you’ll have a stunning interactive heatmap in no time.ĭon’t worry about any complicated coding or overwhelming technicalities. Great, let’s start creating a simple yet beautiful heatmap chart using JavaScript. Ready to dive in? Let’s go! How to Make a JavaScript Heatmap Here is how the final JS-based heatmap chart will look: By the end, you’ll have the skills to easily create your own interactive JavaScript heatmaps.

So, grab your cup of coffee and let’s dive into this step-by-step guide. This will be the visualization we will be building during the tutorial.

in 2021? Using a heatmap chart, we can analyze the days and times of fatal accidents. It provides a quick visual summary of high and low values in the data.įor instance, did you know that an average of 108 people died per day in road accidents in the U.S. One particularly useful chart type is the heatmap, and I’m excited to teach you how to create one with JavaScript in this tutorial.Ī heatmap is a two-dimensional representation of the magnitude of a phenomenon through colors. With it, we can spot patterns and trends that might take much more time to become obvious just by looking at raw numbers. Data visualization is a powerful tool that helps us make sense of complex data.

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