Building a bar chart from scratch
The simplest chart around is the one that holds only one dimensional data (only one value per type). There are many ways to showcase this type of data but the most popular, logical, and simple way is by creating a simple bar chart. The steps involved in creating this bar chart will be very similar even in very complex charts. The ideal usage of this type of chart is when the main goal is to showcase simple data, as follows:
Getting ready
Create a basic HTML file that contains a canvas and an onLoad event that will trigger the init function. Load the 03.01.bar.js script. We will create the content of the JavaScript file in our recipe as follows:
<!DOCTYPE html>
<html>
<head>
<title>Bar Chart</title>
<meta charset="utf-8" />
<script src="03.01.bar.js"></script>
</head>
<body onLoad="init();" style="background:#fafafa">
<h1>How many cats do they have?</h1>
<canvas...
