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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 7.20
Version 7.20 (released in June 2026) is the latest version of RGraph and the major change in this version is an update to the default values of properties making for better looking charts without having to set any properties. Read more about this and other changes in the changelog.

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Download
Get the latest version of RGraph (version 7.20, 9th June 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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Latest forum posts
These are the latest support forum posts that have been posted or updated.

16th June, Rachel
I have a question about the 3D Bar chart
12th June, Marco
Should I use SVG or canvas for the charts on my website?
9th June, Richard
New version of RGraph: version 7.20
3rd June, Patrick
Question about installing RGraph
1st June, Ouja
How do I add a click event to a bar in my Bar chart?


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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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My chart is only visible if I click on the page first


Posted by Alberto Giribal at 14:34 on Friday 2nd July 2021 [link]
Hello,
I Have 3 graphs in 3 different canvas in the same page. The last one only turns to visible if I click over it, otherwise it remains hidden.
I didn't use any kind of hidden and show events, and I don't understand why this behavior. I tried to disable the others 2 graphs (commenting the draw line), and it's the same result.
Thank you all

Posted by Richard at 17:43 on Friday 2nd July 2021 [link]
It sounds like you have the <canvas> tag positioned below the code that creates the chart - is this the case?

If you're not using the window.onload or DOMContentLoaded events then the positioning of the <canvas> tags and the code that creates the charts matters - the tags should be above the code.

Like this:

<!-- The canvas tag is first -->
<canvas id="cvs"></canvas>

<!-- Then the code to create the chart -->
<script>
    new RGraph.Bar({
        id: 'cvs',
        data: [4,3,8,4,2,5,6],
        options: {
        }
    }).draw();
</script>

If you don't want to change things around then try using the window.onload or DOMContentLoaded events:

window.onload = function ()
{
    // Create the chart here
 };

OR:

document.addEventListener('DOMContentLoaded', function (e)
{
    // Create the chart here
 }, false);


Optionally, you can add a redraw after a small timeout (feel free to adjust the duration):

setTimeout(function ()
{
    RGraph.redraw();
}, 250); // 250 = Quarter of a second

[Replies are closed]