[1] CanvasRenderingContext2D.measureText() - Web APIs | MDN ( ()) https://developer.mozilla.org/en/docs/Web/API/CanvasRenderingContext2D/measureText
[2] Remove unnecessary security check from measureText() (annevk著, ) https://github.com/whatwg/html/commit/ae94ec51c83fabdde6bafee5443e29bcccd18e10
[3] Canvas's measureText shouldn't throw SecurityError · Issue #3992 · whatwg/html () https://github.com/whatwg/html/issues/3992
[4] measureText() doesn't need a security check by annevk · Pull Request #4002 · whatwg/html () https://github.com/whatwg/html/pull/4002