Non UI canvas text alternative (non-ui-canvas)
Non UI <canvas> must have a descriptive aria-label or aria-labelledby. Decorative canvases use aria-hidden or role='presentation' instead.
This canvas is lacking aria-hidden. Please note that role="presentation" can also be used to hide decorative elements.
Non-hidden decorative canvas:
This <canvas> element is decorative, but is not using aria-hidden=”true” or role="presentation":