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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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RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£99) commercial license available.

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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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Using the animate() function

The animate function is an older function that was previously a part of RGraph that has now been rewritten and reinstated to RGraph. It can be used in a similar fashion to the jquery animate function but instead of animating css properties, it animates (numeric) RGraph properties. The example shown below uses the trace effect and then when that has finished it animates the size of the tickmarks so that they grow from nothing to their correct size. The marginInner is also animated at the same time and starts at zero and grows to 15. Here's the source code:

<script>
    new RGraph.Line({
        id: 'cvs',
        data: [4,8,6,3,5,2,4],
        options: {
            backgroundGridVlines: false,
            backgroundGridColor: '#eee',
            backgroundGridBorder: false,
            textSize: 16,
            textColor: 'black',
            xaxisLabels: ['John','Fred','Lucy','Idan','Lois','Pete','Jenn'],
            marginInner': 0,
            xaxis: false,
            yaxis: false,
            spline: true,
            tickmarksStyle: 'dot',
            tickmarksSize: 0,// This is the initial size of the tickmarks
        }
    }).trace({frames: 60}, function (obj)
    {
        obj.animate({
            tickmarksSize: 7,
            marginInner: 15
        });
    });
</script>

Above, the animate function is run upon completion of the trace effect, however by using method chaining you can just as easily have them run concurrently like so:

<script>
    new RGraph.Line({
        id: 'cvs',
        data: [4,8,6,3,5,2,4],
        options: {
            backgroundGridVlines: false,
            backgroundGridColor: '#eee',
            backgroundGridBorder: false,
            textSize: 16,
            textColor: 'black',
            xaxisLabels: ['John','Fred','Lucy','Idan','Lois','Pete','Jenn'],
            marginInner: 0,
            xaxis: false,
            yaxis: false,
            spline: true,
            tickmarksStyle: 'dot',
            tickmarksSize: 0, // This is the initial size of the tickmarks
        }
    }).trace({frames: 60}).animate({
        tickmarksSize: 7,
        marginInner: 15
    });
</script>