Charts cannot be scaled when changing the container size - 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.

Download »

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.

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.

Download »

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.

I tried many methods, and one of them:

<script>

    function graf(){
        new RGraph.SVG.Bar({...}).wave();
    }

    const resizeObserver = new ResizeObserver((object) => {

        console.dir('...' );//info if action is catch
        object[0].target.innerHTML = '';//...optional no matter
        graf();
    });

    resizeObserver.observe(document.getElementById('chart-container' ) );
</script>
Each time graf() is called again, the graph and its continer of SVG tag disappear from the HTML document. It doesn't matter whether innerHTML cleanup is used. Console.dir('...') is called but with no chart, it disappears. With listeners do the same. It doesn't matter if it's onmouseover etc. No allert is generated, no error, just gone and only console('...') is repeated...
console('...') idicated that action is called propelly but chart is gone and not created by graf() where RGraph.SVG.Bar({...}).wave(); must be called.

PS.
I wrote the question again because I can't add an answer to the original post, there is some error

The stackoverflow link to the question:
https://stackoverflow.com/questions/79529294/rgraph-charts-cannot-be-scaled-when-container-is-resizing