FIXED: Addition to the Bipolar library - Official support forum

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.

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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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.

Here it is. In the bipolar.js

First proposal : be able to set a background color for text area
I declared a new property
     textBackground: null,

In drawLabels function
     if (properties.textBackground != null) {
this.context.fillStyle = properties.textBackground;
this.context.fillRect(this.marginLeft + this.axisWidth, this.marginTop, barAreaWidth, barAreaHeight);
     }

Second proposal : be able 2 differents set of colors Left and Right
I declared 2 new properties
    leftColors: null,
    rightColors: null,

In draw function, I added
    if (properties.leftColors === null)
properties.leftColors = properties.colors;
    if (properties.rightColors === null)
properties.rightColors = properties.colors;

And in drawLeftBars and drawRigthBars, I replace respectively colors by leftColors and rightColors.

Hope it is clear, Let me know if you need further information.
Have a good day