How to iterate through property names of Javascript object

Question

I would like to get the property names from a Javascript object to build a table dynamically   Example   var obj     fname    joe    lname    smith    number    34     for  var i   0  i  lt  obj properties length  i        alert   name     obj properties i  name     value     obj properties i  value       would alert   name fname value joe  name lname value smith  name number value 34   Then I could build a table using object like this   var obj      players              fname    joe    lname    smith    number    34              fname    jim    lname    Hoff    number    12              fname    jack    lname    jones    number    84                 to produce     fname    lname    number    ------- -------- ---------    joe     smith         34     jim     Hoff          12     jack    jones         84     UPDATE  Thanks to the answer  I have produced a table from the Javascript objects using the property names from the first object in the list for the headers       function renderData             var obj      players                    fname    joe    lname    smith    number    34                    fname    jim    lname    jones    number    12                    fname    jack    lname    Hoff    number    84                               var cols   GetHeaders obj                 Output   html CreateTable obj  cols               function CreateTable obj  cols            var table       lt table gt  lt  table gt             var th       lt tr gt  lt  tr gt             for  var i   0  i  lt  cols length  i                  th append   lt th gt     cols i      lt  th gt                       table append th            for  var j   0  j  lt  obj players length  j                  var player   obj players j               var tr       lt tr gt  lt  tr gt                 for  var k   0  k  lt  cols length  k                      var columnName   cols k                   tr append   lt td gt     player columnName      lt  td gt                               table append tr                     return table             function GetHeaders obj            var cols   new Array            var p   obj players 0           for  var key in p                  alert   name     key     value     p key                cols push key                     return cols

User · Accepted Answer

Use for   in loop   for  var key in obj       console log   name     key     value     obj key           do some more stuff with obj key

User · Answer

In JavaScript 1 8 5  Object getOwnPropertyNames returns an array of all properties found directly upon a given object     Object getOwnPropertyNames   obj     and another method Object keys  which returns an array containing the names of all of the given object s own enumerable properties   Object keys  obj     I used forEach to list values and keys in obj  same as for  var key in obj      Object keys obj  forEach function  key          console log  key   obj key           This all are new features in ECMAScript   the mothods getOwnPropertyNames  keys won t supports old browser s

[javascript] How to iterate through property names of Javascript object?

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