标签: javascript prototypal-inheritance
所以我正在运行此代码
function somefunc() { return new WeakMap(); } somefunc.prototype = new WeakSet(); var wm = new somefunc(); wm instanceof WeakMap //true wm instanceof WeakSet //false
我想问为什么wm不是WeakSet的实例,因为根据给定here的示例,wm应该是{{1}的实例}}
wm
WeakSet