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How to hide js code

Apr 23, 2018 am 10:10 AM
javascript code hide

这次给大家带来怎么隐藏js代码,隐藏js代码的注意事项有哪些,下面就是实战案例,一起来看一下。

好了,我们来看下代码吧。

(function(window) {
 var rep = { // 替换用的数据,使用了4个零宽字符,数据量减少了一半。
  '00': '\u200b',
  '01': '\u200c',
  '10': '\u200d',
  '11': '\uFEFF'
 };
 function hide(str) {
  str = str.replace(/[^\x00-\xff]/g, function(a) { // 转码 Latin-1 编码以外的字符。
   return escape(a).replace('%', '\\');
  });
  str = str.replace(/[\s\S]/g, function(a) { // 处理二进制数据并且进行数据替换
   a = a.charCodeAt().toString(2);
   a = a.length < 8 ? Array(9 - a.length).join('0') + a : a;
   return a.replace(/../g, function(a) {
    return rep[a];
   });
  });
  return str;
 }
 var tpl = '("@code".replace(/.{4}/g,function(a){var rep={"\u200b":"00","\u200c":"01","\u200d":"10","\uFEFF":"11"};return String.fromCharCode(parseInt(a.replace(/./g, function(a) {return rep[a]}),2))}))';
 window.hider = function(code, type) {
  var str = hide(code); // 生成零宽字符串
  str = tpl.replace('@code', str); // 生成模版
  if (type === 'eval') {
   str = 'eval' + str;
  } else {
   str = 'Function' + str + '()';
  }
  return str;
 }
})(window);
Copy after login

大家可以通过最简单的代码例子进行测试一下,看看效果如何,也可以进一步优化,或者写成插件什么的,就当练习吧。。
虽然这个东西没什么实际用处,不过有时候玩玩还是不错的,可出面试题吓唬新人哦。。

相信看了本文案例你已经掌握了方法,更多精彩请关注php中文网其它相关文章!

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