Javascript get object key name

Question

How would I get the key name for the follow  E g I want  button1  and  button2    var buttons         button1            text   Close           onclick  function                          button2            text   Close2           onclick  function                        var i  for i in buttons       if buttons hasOwnProperty i            alert buttons i  text              I tried using  push   although this didn t work

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ECMAscript edition 5 also offers you the neat methods Object keys   and Object getOwnPropertyNames     So  Object keys  buttons          button1    button2

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This might be better understood if you modified the wording up a bit   var buttons       foo   bar     fiz   buz      for   var property in buttons       console log  property       Outputs  foo  fiz or fiz  foo     Note here that you re iterating over the properties of the object  using property as a reference to each during each subsequent cycle   MSDN says of for   variable in  object   array     the following      Before each iteration of a loop  variable is assigned the next property name of object or the next element index of array  You can then use it in any of the statements inside the loop to reference the property of object or the element of array    Note also that the property order of an object is not constant  and can change  unlike the index order of an array  That might come in handy

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An ES6 update    though both filter and map might need customization   Object entries theObj  returns a   key  value    array representation of an object that can be worked on using Javascript s array methods   each     any     forEach     filter     map     reduce    etc   Saves a ton of work on iterating over parts of an object Object keys theObj   or Object values   separately    x000D   x000D  const buttons     x000D      button1    x000D          text   Close   x000D          onclick  function    x000D   x000D            x000D         x000D      button2    x000D          text   OK   x000D          onclick  function    x000D   x000D            x000D         x000D      button3    x000D          text   Cancel   x000D          onclick  function    x000D   x000D            x000D        x000D    x000D   x000D  list   Object entries buttons  x000D       filter   key  value     gt     key   value       undefined      has options x000D       map   key  value   idx    gt      idx     key     value      x000D       x000D  console log list  x000D   x000D   x000D

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Assuming that you have access to Prototype  this could work  I wrote this code for myself just a few minutes ago  I only needed a single key at a time  so this isn t time efficient for big lists of key value pairs or for spitting out multiple key names   function key int        var j   -1      for var i in this            j            if j  int                return i            else               continue                    Object prototype key   key    This is numbered to work the same way that arrays do  to save headaches  In the case of your code   buttons key 0     Should result in  button1

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Variable i is your looking key name

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Change alert buttons i  text   to alert i

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Here is a simple example  it will help you to get object key name   var obj   parts  costPart 1000  salesPart  2000    console log Object keys obj     the output would be parts

[javascript] Javascript get object key name

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