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分享HTMLDocument.constructor == Function //true
HTMLDocument.prototype == document.__proto__ //true
HTMLDocument == document.constructor //trueHTMLDocument.__proto__==Function.prototype // falsefunction Foo(){};
Foo.__proto__==Function.prototype; //trueObject.getPrototypeOf(HTMLDocument)
// ƒ Document() { [native code] }
Object.getPrototypeOf(Document)
// ƒ Node() { [native code] }
Object.getPrototypeOf(Node)
// ƒ EventTarget() { [native code] }
Object.getPrototypeOf(EventTarget)
// ƒ () { [native code] }
即
HTMLDocument.__proto__.__proto__.__proto__.__proto__ === Function.prototype //true