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 use for showing charts on your website.
Get the latest version of RGraph (version 6.18, 1st June 2024) 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.
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