[1] 903332 – document.watch() results in "TypeError: can't watch non-native objects of class Proxy"
( ( 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=903332>
[2] Object.prototype.watch() - JavaScript | MDN
( 版)
<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/watch>