javascript - Autocomplete function works just in open script tag and not in the same tag in ajax.done function -

here's code:

    var components = new array();     $("#types").change(function() {         $.ajax({           method: "get",           url: "/index.php/field/get-fields-by-type/" + $("#types").val(),           datatype: "json"         }).done(function( data ) {             (var = 0, len = data.length; < len; i++) {                 var dat = data[i];                 components.push({ value: dat.name, data: dat.id });             }             //here get: typeerror: $(...).autocomplete not function             $('#productfield-field_id').autocomplete({                 lookup: components,                 onselect: function (suggestion) {                     alert('you selected: ' + suggestion.value + ', ' + suggestion.data);                     $("#productfield-field_id").val(suggestion.data);                 }             });         });     });      // here works charm , functionality should doing     $('#productfield-field_id').autocomplete({         lookup: components,         onselect: function (suggestion) {             alert('you selected: ' + suggestion.value + ', ' + suggestion.data);             $("#productfield-field_id").val(suggestion.data);         }     }); 

i want know reason. why im getting typeerror message autocomplete in $.ajax.done function when it's in script tag plain open works , functionality no errors. , how can solve problem add components lookup

i've debugged far , can tell components has value in proper style formatted , jquery selecting #productfield-field_id valid , can find it. tried example adding value , worked.

im using autocomplete: https://www.devbridge.com/sourcery/components/jquery-autocomplete/ , tried replace autocomplete "devbridgeautocomplete" , results same. works in open not in ajax.done function.

i've tried make alternative solution putting plain open code standalone javascript function takes array parameter , tried call autocomplete function in that. typeerror too.

also jquery , autocomplete included webpage.

browsers i've tried: firefox & chrome