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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，这一点在91视频中也有详细论述
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A decade after a new constitution promised a fresh start, many young people say those hopes remain unmet. By some estimates, about one in five young Nepalis is out of work.
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