两个方法:
1、利用用浏览器内部转换器实现html转义;
2、用正则表达式实现html转义;
var HtmlUtil = { /*1.用浏览器内部转换器实现html编码(转义)*/ htmlEncode:function (html){ //1.首先动态创建一个容器标签元素,如DIV var temp = document.createElement ("div"); //2.然后将要转换的字符串设置为这个元素的innerText或者textContent (temp.textContent != undefined ) ? (temp.textContent = html) : (temp.innerText = html); //3.最后返回这个元素的innerHTML,即得到经过HTML编码转换的字符串了 var output = temp.innerHTML; temp = null; return output; }, /*2.用浏览器内部转换器实现html解码(反转义)*/ htmlDecode:function (text){ //1.首先动态创建一个容器标签元素,如DIV var temp = document.createElement("div"); //2.然后将要转换的字符串设置为这个元素的innerHTML(ie,火狐,google都支持) temp.innerHTML = text; //3.最后返回这个元素的innerText或者textContent,即得到经过HTML解码的字符串了。 var output = temp.innerText || temp.textContent; temp = null; return output; }, /*3.用正则表达式实现html编码(转义)*/ htmlEncodeByRegExp:function (str){ var temp = ""; if(str.length == 0) return ""; temp = str.replace(/&/g,"&"); temp = temp.replace(/</g,"<"); temp = temp.replace(/>/g,">"); temp = temp.replace(/\s/g," "); temp = temp.replace(/\'/g,"'"); temp = temp.replace(/\"/g,"""); return temp; }, /*4.用正则表达式实现html解码(反转义)*/ htmlDecodeByRegExp:function (str){ var temp = ""; if(str.length == 0) return ""; temp = str.replace(/&/g,"&"); temp = temp.replace(/</g,"<"); temp = temp.replace(/>/g,">"); temp = temp.replace(/ /g," "); temp = temp.replace(/'/g,"\'"); temp = temp.replace(/"/g,"\""); return temp; }, /*5.用正则表达式实现html编码(转义)(另一种写法)*/ html2Escape:function(sHtml) { return sHtml.replace(/[<>&"]/g,function(c){return {'<':'<','>':'>','&':'&','"':'"'}[c];}); }, /*6.用正则表达式实现html解码(反转义)(另一种写法)*/ escape2Html:function (str) { var arrEntities={'lt':'<','gt':'>','nbsp':' ','amp':'&','quot':'"'}; return str.replace(/&(lt|gt|nbsp|amp|quot);/ig,function(all,t){return arrEntities[t];}); } };
来源:https://www.cnblogs.com/willingtolove/p/11059325.html