Uncaught TypeError: Cannot use 'in' operator to search for 'length' in
The in operator only works on objects. You are using it on a string. Make sure your value is an object before you using $.each. In this specific case, you have to parse the JSON:
$.each(JSON.parse(myData), ...);
maybe you forget to add parameter dataType:'json' in your $.ajax
$.ajax({ type: "POST", dataType: "json", url: url, data: { get_member: id }, success: function( response ) { //some action here }, error: function( error ) { alert( error ); }});
The only solution that worked for me and $.each was definitely causing the error. so i used for loop and it's not throwing error anymore.
Example code
$.ajax({ type: 'GET', url: 'https://example.com/api', data: { get_param: 'value' }, success: function (data) { for (var i = 0; i < data.length; ++i) { console.log(data[i].NameGerman); } } });