修复ueditor百度编辑器在IE8下shCore.js报错'undefined'错误的问题

 ueditor在IE8下点击任意文本框报脚本错误

 

错误问题：

在IE8下出现脚本错误  'undefined'为空或不是对象  的问题

出现问题的文件为：

shCore.js

行数：299行

 

 

文件路径：ueditor\third-party\SyntaxHighlighter\shCore.js

 

 

报错的代码为：

299行

real.replace.call(str.toString().slice(match.index), r2, function () {
 for (var i = 1; i < arguments.length - 2; i++) {
  if (arguments[i] === undefined)
    match[i] = undefined;
   }
});

错误原因为：299行中的

str.toString().slice(match.index)

 

传递进来的str变量未经过判断

 

在函数开始处增加 

 

if(str!==undefined) 既可以修复该问题

RegExp.prototype.exec = function (str) {
 if(str!==undefined){
 
 
        var match = real.exec.apply(this, arguments),
            name, r2;
        if (match) {
            // Fix browsers whose `exec` methods don't consistently return `undefined` for
            // nonparticipating capturing groups
            if (!compliantExecNpcg && match.length > 1 && indexOf(match, "") > -1) {
                r2 = RegExp(this.source, real.replace.call(getNativeFlags(this), "g", ""));
                // Using `str.slice(match.index)` rather than `match[0]` in case lookahead allowed
                // matching due to characters outside the match
                real.replace.call(str.toString().slice(match.index), r2, function () {
                    for (var i = 1; i < arguments.length - 2; i++) {
                        if (arguments[i] === undefined)
                            match[i] = undefined;
                    }
                });
            }
            // Attach named capture properties
            if (this._xregexp && this._xregexp.captureNames) {
                for (var i = 1; i < match.length; i++) {
                    name = this._xregexp.captureNames[i - 1];
                    if (name)
                       match[name] = match[i];
                }
            }
            // Fix browsers that increment `lastIndex` after zero-length matches
            if (!compliantLastIndexIncrement && this.global && !match[0].length && (this.lastIndex > match.index))
                this.lastIndex--;
        }
        return match;
  }
    };

原文链接：  枫叶博客：http://www.9it.me/article-9.html