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.
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
Specifications
- HTML Standard, from HTML Workstream (WHATWG).