canvas-text-alternative-present
<canvas> must provide a text alternative
automaticWCAG 1.1.1 (A)confidence: highseverity: seriousperceivable
Checks that <canvas> elements provide a text alternative via fallback content or an accessible name.
Applies to. Applies to <canvas> elements included in the accessibility tree. Hidden elements are excluded whether or not they are focusable.
Expectation. Each applicable <canvas> provides a text alternative via fallback content or an accessible name.
Examples
pass
<canvas>Chart summary</canvas>
Fallback content between the tags provides a text alternative.
fail
<canvas></canvas>
No fallback content and no accessible name.