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Editorial Team
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Asked: 2026-05-28T03:22:32+00:00

I am making a post call and want to set the paramaters I send

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I am making a post call and want to set the paramaters I send dynamically through some if/else statements. The following simplified version doesn’t work but if I change ‘{postvars}’ to ‘{n: n}’ then it does, even though they’re equivalent, right? 

<html>
<head>
<title></title>
<script type="text/javascript" src="jquery-1.7.1.js"></script>
<script type="text/javascript">
   $(document).ready(function () {

   $("#clicky").click(function () {
     var postvars; var mydata;
     var n = 'dave';
     postvars = 'n: ' + n;

      $.post("test.php", 
     {postvars}, 
      function(data){
          }, 
        "text"
        );  

$("#test").text(postvars);

  });
   });
</script>
</head>
<body>

<div id='clicky'>click here</div>
<div id='test'></div>

</body>


</html>
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1 Answer

  1. Editorial Team

    {postvars} and {n: n} are not equivelent,

    {postvars} will be seen to javascript as an object initalizer, and will error out as postvars just a string which can not set the attributes/values of an object by itself.

    {n: n}, however is a proper object initalizer as it gives name and value

    jquery ajax functions take either a name value pair string,

      $.post("test.php", 
         "data=somedata&moredata=thisdata", 
         function(data){
         }, 
         "text"
  );

    or a json object,

    var newData = "Some new data";
var data = {
     "dataname":"datavalue";
};

//add dynamic variables to object
data["newData"] = newData;

$.post("test.php", 
       data, 
       function(data){
       }, 
       "text"
 );
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