$. Each traverses the JSON string and Uncaught TypeError: Cannot use & #39; in & #39; operator to search for & #39; 156 error, jsonuncaught

$. Each traverses the JSON string and Uncaught TypeError: Cannot use 'in' operator to search for '156 error, jsonuncaught

Currently, webpage and backend interactions are popular. json is used to record the method for parsing strings. Do not forget it all the time !!!!

Success: function (data) {// data is a string passed in the background $. each (JSON. parse (data), function (index, obj) {// use JSON. parse is converted to a JavaScript Object. Otherwise, the console reports that index is a subscript obj. if the content is an object, obj. (The name can be used) alert (index );});},

If JSON. parse () is not used for conversion, the following error occurs: Uncaught TypeError: Cannot use 'in' operator to search for '123 '.