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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 show charts on your website.

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RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£99) commercial license available.

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Sliding tooltips on the canvas charts

Written by Richard Heyes, RGraph author, on 9th October 2021

The svg charts have, since their inception, had sliding tooltips. In my opinion, these look nicer than the standard canvas tooltips - which "jump"to the new location.

Well hold to your hats, because the canvas charts now have - sliding tooltips!

They operate in much the same way as the svg sliding tooltips and this effect is now the default. That means that if you upgrade your canvas libraries and your chart has tooltips, you'll get the sliding effect instead of the fade effect by default.

If you don't like it then you can just set the tooltipsEffect property to fade in your chart's configuration.

To see an example of the fade effect you can see it on the SVG Bar chart documentation page.