Javascript regular expression greedy mode and non-greedy mode

This article introduces the greedy mode and non-greedy mode of the javascript regular expression to the coders. For more information about the coders, see.

/**     **   author: site120     **   function : get script part from html document     **/     var loadJs = function(str , delayTime)      {          var delayTime = delayTime || 100;          var regExp_scriptTag = new RegExp("＜\\s*script([^>]*)>([\\s\\S]*?)＜/\\s*script\\s*>" , "gi");          var regExp_scriptAttrib_src = new RegExp("\\s*src?\\s*=\\s*(\"([^\"]+)\"|\'([^\']+)\'|\\s*([^\\s]+)\\s*)" , "gi");          var arr_scriptTag = null;          var arr_scriptAttib = null;          var scriptData = "";          var jsList = new Array();          while ((arr_scriptTag=regExp_scriptTag.exec(str)) != null)          {              while ((arr_scriptAttib=regExp_scriptAttrib_src.exec(arr_scriptTag[1])) != null)              {                   if (arr_scriptAttib[3])                  {                      jsList.push(arr_scriptAttib[3]);                  }                  else if (arr_scriptAttib[2])                  {                      jsList.push(arr_scriptAttib[2]);                  }                  else                 {                      jsList.push(arr_scriptAttib[1]);                  }              }              scriptData += (arr_scriptTag[2]);          }          for (var i=0; i＜jsList.length; i++)          {              var script = document.createElement("script");              script.src = jsList[i];              document.body.appendChild(script);          }          if (scriptData.length > 0)          {              var fn = "_siteFunction_" + new Date().getTime() + "_" + parseInt(Math.random()*10000) + "_120";              scriptData = " var " + fn + " = function(){ " + scriptData + " };  "+fn+"();"             window.eval(scriptData);          }      }   

This is to use Js to process regular expressions. The principle is the same as that of Java,
The function is to read the source code of a webpage and extract and load all the script labels in it.
Here [\ s \ S] *? Use the non-greedy mode to match all the code between the most recent script tags. Includes line feed