Canvas Based Pie Chart Generator with Pure JavaScript – PieChartLib.js

PieChartLib.js is a lightweight JavaScript library used to generate flat 2D pie chart using HTML5 canvas element.

How to use it:

Include the PieChartLib.js JavaScript file on the webpage.

<script src="PieChartLib.js"></script>

Create an HTML5 canvas element on where you want to draw the pie chart.

<canvas id="demo"></canvas>

Create new pie chart.

var canvas = document.getElementById('canvas');
var graph = new PieChart(canvas, radius, x, y);

Add items to the pie chart.

graph.items.push(new PieChartDataItem(70, "rgb(255, 0, 0)"));
graph.items.push(new PieChartDataItem(30, "rgb(0, 255, 0)"));

Draw a pie chart on the canvas element.

graph.draw();

Settings available.

background = "rgba(255,255,255,1)";
border = {size: 10, color: "rgba(255,255,255,1)"};
shadow = {offsetX: 0, offsetY: 0, blur: 10, color: "rgba(0,0,0,.3)"};
offsetAngle = 0;