[1] CanvasRenderingContext2D.measureText() - Web APIs | MDN ( (2016-02-02 12:42:58 +09:00)) https://developer.mozilla.org/en/docs/Web/API/CanvasRenderingContext2D/measureText

[2] Remove unnecessary security check from measureText() (annevk著, 2018-09-06 00:43:50 +09:00) https://github.com/whatwg/html/commit/ae94ec51c83fabdde6bafee5443e29bcccd18e10

[3] Canvas's measureText shouldn't throw SecurityError · Issue #3992 · whatwg/html (2018-09-29 17:33:55 +09:00) https://github.com/whatwg/html/issues/3992

[4] measureText() doesn't need a security check by annevk · Pull Request #4002 · whatwg/html (2018-09-29 17:34:44 +09:00) https://github.com/whatwg/html/pull/4002