我在网页的脚本上得到了奇怪的字符。这是脚本的一部分
___=~[];___={___:++___,$$$$:(![]+"")[___],__$:++___,$_$_:(![]+"")[___],_$_:++___,$_$$:({}+"")[___],$$_$:(___[___]+"")[___],_$$:++___,$$$_:(!""+"")[___],$__:++___,$_$:++___,$$__:({}+"")[___],$$_:++___,$$$:++___,$___:++___,$__$:++___};___.$_=(___.$_=___+"")[___.$_$]+(___._$=___.$_[___.__$])+(___.$$=(___.$+"")[___.__$])+((!___)+"")[___._$$]+(___.__=___.$_[___.$$_])+(___.$=(!""+"")[___.__$])+(___._=(!""+"")[___._$_])+___.$_[___.$_$]+___.__+___._$+___.$;___.$$=___.$+(!""+"")[___._$$]+___.__+___._+___.$+___.$$;___.$=(___.___)[___.$_][___.$_];___.$(___.$(___.$$+"\""+"\\"+___.__$+___.$$_+___.$$_+___.$_$_+"\\"+___.__$+___.$$_+___._$_+"\\"+___.$__+___.___+___._$+___.$_$$+"\\"+___.__$+___.$_$+___._$_+"\\"+___.$__+___.___+"=\\"+___.$__+___.___+"{\\"+___.$__+___.___+"};\\"+___.__$+___._$_+___._$+___.$_$$+"\\"+___.__$+___.$_$+___._$_+".\\"+___.__$+___.$$_+___._$$+___.$$$_+___.$$__+"\\"+___.__$+___.$$_+___._$_+___.$$$_+___.__+"\\"+___.$__+___.___+"=\\"+___.$__+___.___+"\\\"\\"+___.__$+___.___+___.__$+"\\"+___.__$+___.$_$+___.$$_+"\\"+___.__$+___.$__+___.$$$+___.$$$_+(![]+"")[___._$_]+"\\"+___.__$+___.$_$+___.__$+"\\"+___.__$+___.$_$+___.$$_+___.$_$_+"\\"+___.$__+___.___+"\\"+___.
这以一种奇怪的方式提醒（“为什么”）。怎么可能？
答案 0 :(得分：1)
这称为代码混淆，使用非英语字母表的utf-8字符。变量具有有效的名称，并且通常会调用函数来进行转换，以通过警报等提供输出的英文文本。
请参阅此处以获得良好的讨论：How can I obfuscate (protect) JavaScript?