什么是最简单的JavaScript HTMLEncode库/函数实现？ [英] What is the most simple JavaScript HTMLEncode lib/function implementation?

问题描述

我正在寻找一个js函数或lib，它可以将™等特殊字符转换为& trade; ，有人知道吗？我正在寻找我能找到的最简单的一个。

这些是 HTML命名实体，它们不是最佳解决方案 - 更好地使用数字实体。为什么数字实体更好？因为您没有像©→& copy; 之类的地图。所有你需要的是一个字符本身。

  function abc（input）{
 var output =; 
 var allowedChars =0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM; 
 
 for（var i = 0; i< input.length; i ++）{
 var char = input.charAt（i）; 
 var charCode = input.charCodeAt（i）; 
 
 if（isNaN（charCode））{
 continue; 
} 
 
 if（allowedChars.indexOf（char）> -1）{
 output + = char; 
} else {
 output + =&＃+ charCode +;; 
} 
} 
 
返回输出; 
} 
 
 alert（abc（Hello world！？™汉））; // Hello&＃32; world&＃32;&＃169;&＃8482;&＃27721 
  

I'm looking for a js function or lib that'll convert special chars like ™ to ™, does anyone know of any? I'm looking for the simplest one that I can find.

解决方案

Those are HTML named entities and they're not a best solution — better use a numerical entities. Why numerical entities are better? Cause you don't have any map like © → ©. All you need is a character itself.

function abc(input) {
    var output = "";
    var allowedChars = "0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";

    for (var i = 0; i < input.length; i++) {
         var char     = input.charAt(i);
         var charCode = input.charCodeAt(i);

         if (isNaN(charCode)) {
             continue;
         }

         if (allowedChars.indexOf(char) > -1) {
             output += char;
         } else {
             output += "&#" + charCode + ";";
         }
    }

    return output;
}

alert(abc("Hello world! ©™汉")); // Hello&#32;world&#33;&#32;&#169;&#8482;&#27721

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