brackets javascript debugger

At present, the commonly used browser ie, Chrome, Firefox have the corresponding script debugging function. As our. NET camp, learn how to debug JS in IE is enough, in the grasp of IE debugging methods, Chrome and Firefox debugging methods have become quite simple. debugging in the F12 developer tool Open IE browser, press the F12 key, will open the developer tool, this is the IE built-in developer development tools, to facilitate the development of HTML, CSS,

this.Note that the parentheses after typeof are not semantic 4 (not function call), but the semantics 5 mentioned later. I use typeof without parentheses. For details, refer to the multiple call methods of the named function.Semantic 5: forced expression operation www.2cto.comFunction strToJson (str) {// Force operator () is added to both sides of the string in eval ()Var json = eval ('+ str + ')');Return json;}For semantics 5, you are most familiar with using eval to parse JSONAnother example

My QQ number: 1539832180. Welcome to discuss the study together. *****1. If you define a variable, you cannot add quotation marks.Because in most languages, the contents of single quotation marks (or double quotes) represent strings.2. If you define a string, you must enclose it in quotation marks.var str = "This is a book!";document.write ("str");//This is a variable; output this is a book!document.write (str);//This is a string. Output str;What's in the Ja