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.net Powerful JavaScript charts
About
RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 18 years old) and has a wealth of features making it an ideal choice to use for showing charts on your website.

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Version 7.10 released
Version 7.10 (released in January 2026) is the latest version of RGraph and contains various updates to the code which you can see on the changelog page. There's also a big tidy up in terms of comments and a significant change to the way that the internal code is referenced which should lead to a performance improvement in effects and animations.

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New HTML datagrid
In the April 2025 (v6.21) release a new datagrid object was added. This makes it easy to add static or dynamic data tables to your pages. It can be used whether you use the canvas or SVG libraries or entirely standalone.

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Download
Get the latest version of RGraph (version 7.10, 18th January 2026) from the download page. You can read the changelog here. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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License
RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£129) commercial license available.

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HOWTO: Create a floating progress bar using transparent colors

RGraph doesn't support floating progress bars as an option, though by using the css3 color rgba color selector it can be achieved. It works by setting the inner stroke and the first color to transparent so that they cannot be seen. If using tooltips then the first tooltip will also need to be set to null.

The original progress bar

Here's the source-code for the original progress bar before altering the colors.

[No canvas support] 
<script>
    new RGraph.HProgress({
        id: 'cvs',
        min: 0,
        max: 20,
        value: [5,4,2,4],
        options: {
            marginInner: 5,
            tickmarks: 10,
            tickmarksInner: true,
            colors: ['red','#0f0','yellow','pink'],
            tooltips: ['Gary','Joel','Peter','Rich'],
            textSize: 14
        }
    }).draw();
</script>

The floating progress bar

Now the colors and values are set accordingly to make the progress appear as though it's floating. You will need to calculate the first value so that the first section of the bar is positioned correctly. The first color is set to transparent (rgba(0,0,0,0), the stroke color is set to transparent and the first tooltip (if tooltips are used) is set to null.

[No canvas support] 
<script>
    new RGraph.HProgress({
        id: 'cvs2',
        min: 0,
        max: 20,
        value: [5,4,2,4],
        options: {
            margin: 5,
            tickmarks: 10,
            tickmarksInner: true,
            colors: ['rgba(0,0,0,0)','#0f0','yellow','pink'],
            tooltips: [null,'Joel','Peter','Rich'],
            textSize: 14,
            colorsStrokeInner: 'rgba(0,0,0,0)'
        }
    }).draw();
</script>

And here's an example of some code for a Vertical Progress bar: 

<script>
    new RGraph.VProgress({
        id: 'cvs',
        min: 0,
        max: 20,
        value: [5,4,2,4],
        options: {
            margin: 5,
            tickmarks: 10,
            tickmarksInner: true,
            colors: ['rgba(0,0,0,0)','#0f0','yellow','pink'],
            tooltips: [null,'Joel','Peter','Rich'],
            textSize: 14,
            colorsStrokeInner: 'rgba(0,0,0,0)'
        }
    }).draw()
</script>