jQuery each error :Uncaught TypeError: Cannot use 'in' operator to search for '18' in div[data-role=page]

Question

My html is like

...


        
      

Answer 1

The key reason your code isn't working is because you're trying to iterate a string, which isn't what you really want to do.

To iterate jQuery collections, try the other form of .each():

$("div[data-role=page]").each(function() {
    //...
});

$.each() is (usually) for arrays or plain objects.