2D canvas opacity
Limited availability
The optional alpha parameter of a 2D canvas's getContext() method sets whether the canvas has an alpha transparency channel. If set to false, then this permits the browser to optimize compositing for an opaque canvas.
Learn more
Specifications
- HTML (#concept-canvas-alpha), from HTML Workstream (WHATWG).
Browser support
- Chrome 32 Released on 2014-01-14
- Chrome Android 32 Released on 2014-01-15
- Edge 79 Released on 2020-01-15
- Firefox 30 Released on 2014-06-10
- Firefox for Android 30 Released on 2014-06-10
- Safari ❌
- Safari on iOS ❌
Baseline availability blocked since January 2020 by Safari (66 months)
Usage (according to Chrome Platform Status)
~42.990% of page loads. More data at chromestatus.
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