#import // https://html.spec.whatwg.org/multipage/canvas.html#canvastext interface mixin CanvasText { undefined fillText(Utf16DOMString text, unrestricted double x, unrestricted double y, optional unrestricted double maxWidth); undefined strokeText(Utf16DOMString text, unrestricted double x, unrestricted double y, optional unrestricted double maxWidth); TextMetrics measureText(Utf16DOMString text); };