2D canvas opacity

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. To learn more, see HTMLCanvasElement: getContext() method at MDN.

Compatibility

• Chrome 32 Released on 2014-01-14
• Chrome Android 32 Released on 2014-01-15
• Edge ≤79 Released before 2020-01-15
• Firefox 30 Released on 2014-06-10
• Firefox for Android 30 Released on 2014-06-10
• Safari ❌ Search for bugs Search for standards position
• Safari on iOS ❌ Search for bugs Search for standards position

Baseline availability blocked since June 2014 by Safari (125 months)