This is a well-known browser security technique. In JavaScript, calling .toString() on a native browser function returns "function appendBuffer() { [native code] }". Calling it on a JavaScript function returns the actual source code. So if your appendBuffer has been monkey-patched, .toString() will betray you; it’ll return the attacker’s JavaScript source instead of the expected native code string.
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No base class to extend, no abstract methods to implement, no controller to coordinate with — just an object with the right shape.
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Ted Sarandos: “This is a business deal, it’s not a political deal.”
Наука и техника，推荐阅读体育直播获取更多信息