How do I check if device supports WebGL

I have an in game item that changes color of objects.

The user can use in-game money to use it.

I am curious if it is possible to check if Replace Color works on users device.

I would like to not offer the item on devices that can't use the effect, or possibly change it's use.

I assume if webgl is supported then the effects would be too, but not sure how to check for neither.

The Renderer system expression returns canvas2d or webgl?

I accidentally closed my browser after I typed a reply....

I didn't know that existed.

It should work.

https://www.scirra.com/manual/126/system-expressions

renderer

"The name of the renderer used to draw the game, currently either canvas2d or webgl. See Technology for more information on canvas renderers."

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Thanks I got it to work. Set a variable to 'Renderer'

The variable then is set to 'webgl'.

I disabled WebGL in chrome and got 'canvas2d'

It is something I could have found myself.

I usually end up searching for the wrong terms and not finding the results...