javascript - jQuery - $.ajax returns other dataFormat as $post -

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When I get data from server $ If I use Ajax, the format looks different than the $ .post request result. How can I change the $ .post request to get the same format with a $ .ajax request? Otherwise I can not use my loop to read the data:

Working code with $ ajax: 

  $ .ajax ({url: "/ fetchdata. Php ", type:" post ", data type:" jason ", data:" param = no ", success: work (data) {console.log (data); for (var i = 0; i & lt ; Data; lanf; i ++) {$ ('# dom'). ('& Lt; li & gt;' + data [i] .username '' ;);} }, Error: task (e) {console.log (e);}});

Console $ .get result: 

  [object, object, object, object]

no Work Code with $ Post: 

  var jqxhr = $ .post ("/fetchdata.php", function (data) {console.log (data); for (var i = 0 ; & Lt; li & gt; '+ data [i] .username' '');}}) .done (function) (
  •  () { }. .file (function () {}) .ways (function () {}); $ .post result in console:  
      [{"id_usesrs": "1", " Username ":" A "}, {" "4", "Username": "D": "2", "Username": "B"}, {"id_usesrs": "3" "Name": "c"}, {"id_usesrs"}]

    • Specify that it returns to JSON and not the string

    $. ("/ Fetchdata.php", function {data} {...}, 'json')

    The last parameter is $ .post () dataType is equal to $. Ajax ()

    More info


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