RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 15 years old) and has a wealth of features making it an ideal choice to show charts on your website.

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Get the latest version of RGraph (version 6.17) from the download page. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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Video of the new Pie chart wave effect

Written by Richard Heyes, RGraph author, on 9th April 2024

The next version of RGraph - version 6.18- will incorporate a new wave effect for the Pie chart (and thus the Donut chart as well). This new effect is similar to the wave for the Bar chart and gradually increases the radius of the segments from zero. This video demonstrates the new effect and also shows an example of using the animation callback function, that runs when the effect has finished, to increase the width of the Donut chart. If you can't wait for the next version to be released then you can download the Pie chart library from GitHub here.

Here's the code for the demo . I've added the frames option to the call to the wave effect in order to slow the effect down and make it more obvious for you.

    new RGraph.Pie({
        id: 'cvs',
        data: [4,8,2,6,9,5],
        options: {
            shadow: false,
            labels: ['Brian','Olga','Vicki','Lucy','Bobby','Paul'],
            labelsList: 0,
            labelsSize: 18,
            linewidth: 5,
            variant: 'donut'
    }).wave({frames: 180});
    //}).wave({frames: 180}, function (obj)
    //    obj.set('variantDonutWidth', obj.radius / 2);
    //    obj.animate({variantDonutWidth: 125});