js中如何隐藏eval关键字？

JavaScript中隐藏eval关键字的技巧

某些情况下，我们在进行JS编程时，可能想要用eval执行一些特殊的代码，但想不想让他人轻易看出是使用了eval。那么，就得想办法隐藏eval关键字了。

简单的隐藏方法

// 方法1：使用字符串分割
const ev = "ev";
const al = "al";
const hiddenEval = window[ev + al];// 使用
hiddenEval('console.log("隐藏的eval执行")');// 方法2：通过Function构造函数
const executeCode = new Function('code', 'return eval(code)');
executeCode('2 + 2'); // 返回4

复杂的隐藏方法

// 使用字符编码
const encodedEval = () => {const chars = [101, 118, 97, 108];const str = String.fromCharCode(...chars);return window[str];
};const myEval = encodedEval();

更更更复杂的隐藏方法

如果还想隐藏的更深，可以再用JShaman进行JS代码混淆加密，上面代码会变成：

const encodedEval = () => {const _0x35ea38 = {"\u006d\u004f\u0067\u006c\u0048": function (_0x55d02e, _0x5cdb2b) {return _0x55d02e ^ _0x5cdb2b;},"\u0076\u006a\u0048\u0044\u0073": function (_0x4c98c3, _0xa2b4f0) {return _0x4c98c3 ^ _0xa2b4f0;}};const _0x2cd5ff = [0x47a4d ^ 0x47a28, _0x35ea38["\u006d\u004f\u0067\u006c\u0048"](0xd8290, 0xd82e6), _0x35ea38['vjHDs'](0xb9759, 0xb9738), _0x35ea38["\u0076\u006a\u0048\u0044\u0073"](0x7b450, 0x7b43c)];const _0x3d45d7 = String['fromCharCode'](..._0x2cd5ff);return window[_0x3d45d7];
};const myEval = encodedEval();

或：

function _0x927a(opcode) {var op = {push: 32,add: 33,sub: 34,mul: 35,div: 36,pop: 37,xor: 38};var stack = [];var ip = -1;var sp = -1;while (ip < opcode.length) {ip++;switch (opcode[ip]) {case op.push:{ip++;stack.push(opcode[ip]);sp++;break;}case op.add:{stack.push(stack[sp - 1] + stack[sp]);sp++;break;}case op.sub:{stack.push(stack[sp - 1] - stack[sp]);sp++;break;}case op.mul:{stack.push(stack[sp - 1] * stack[sp]);sp++;break;}case op.div:{stack.push(stack[sp - 1] / stack[sp]);sp++;break;}case op.xor:{stack.push(stack[sp - 1] ^ stack[sp]);sp++;break;}case op.pop:{return stack[sp];}}}
}const encodedEval = () => {const chars = [_0x927a([32, 865932, 32, 866025, 38, 37]), _0x927a([32, 625917, 32, 625803, 38, 37]), _0x927a([32, 750963, 32, 750866, 38, 37]), _0x927a([32, 753540, 32, 753640, 38, 37])];const str = String['\x66\x72\x6f\x6d\x43\x68\x61\x72\x43\x6f\x64\x65'](...chars);return window[str];
};const myEval = encodedEval();

怎么样，还能找到eval关键字吗？