canvas-gauges
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CSS warnings "Expected color but found ‘null’
On FireFox [version 123.0.1 (64-bit)] console, there are many CSS warnings of "Expected color but found ‘null’." e.g when opening the sample page https://rawgit.com/Mikhus/canvas-gauges/master/examples/radial-component.html
Searching the web for this error, I founs a similar problem for ctx.strokeStyle & ctx.fillStyle and their solution - https://github.com/ecomfe/zrender/pull/784/files