How to get all properties values of a JavaScript Object without knowing the keys

Question

If there is a JavaScript object  var objects         Suppose  it has more than 50 properties  without knowing the property names  that s without knowing the  keys   how to get each property value in a loop

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I realize I m a little late but here s a shim for the new firefox 47 Object values method  Object prototype values   Object prototype values    function obj      return this keys obj  map function key       return obj key

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const object1       a   somestring     b  42     for  let  key  value  of Object entries object1       console log    key     value           expected output      a  somestring      b  42     order is not guaranteed

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Apparently - as I recently learned - this is the fastest way to do it   var objs          var objKeys   Object keys obj   for  var i   0  objLen   objKeys length  i  lt  objLen  i             do whatever in here     var obj   objs objKeys i

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use a polyfill like   if  Object values  Object values obj  gt Object keys obj  map key  gt obj key      then use  Object values my object    3  profit

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const myObj     a 1  b 2  c 3    Get all values    the shortest way    const myValues   Object values myObj   const myValues   Object keys myObj  map key   gt  myObj key

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use   console log variable    and if you using google chrome open Console by using Ctrl Shift j  Goto    Console

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Depending on which browsers you have to support  this can be done in a number of ways  The overwhelming majority of browsers in the wild support ECMAScript 5  ES5   but be warned that many of the examples below use Object keys  which is not available in IE  lt  9  See the compatibility table   ECMAScript 3   If you have to support older versions of IE  then this is the option for you   for  var key in obj        if  Object prototype hasOwnProperty call obj  key             var val   obj key              use val           The nested if makes sure that you don t enumerate over properties in the prototype chain of the object  which is the behaviour you almost certainly want   You must use  Object prototype hasOwnProperty call obj  key     ok   rather than  obj hasOwnProperty key     bad   because ECMAScript 5  allows you to create prototypeless objects with Object create null   and these objects will not have the hasOwnProperty method  Naughty code might also produce objects which override the hasOwnProperty method   ECMAScript 5   You can use these methods in any browser that supports ECMAScript 5 and above  These get values from an object and avoid enumerating over the prototype chain  Where obj is your object   var keys   Object keys obj    for  var i   0  i  lt  keys length  i          var val   obj keys i           use val     If you want something a little more compact or you want to be careful with functions in loops  then Array prototype forEach is your friend   Object keys obj  forEach function  key        var val   obj key          use val       The next method builds an array containing the values of an object  This is convenient for looping over   var vals   Object keys obj  map function  key        return obj key           use vals array   If you want to make those using Object keys safe against null  as for-in is   then you can do Object keys obj             Object keys returns enumerable properties  For iterating over simple objects  this is usually sufficient  If you have something with non-enumerable properties that you need to work with  you may use Object getOwnPropertyNames in place of Object keys   ECMAScript 2015   A K A  ES6   Arrays are easier to iterate with ECMAScript 2015  You can use this to your advantage when working with values one-by   one in a loop   for  const key of Object keys obj         const val   obj key          use val     Using ECMAScript 2015 fat-arrow functions  mapping the object to an array of values becomes a one-liner   const vals   Object keys obj  map key   gt  obj key        use vals array   ECMAScript 2015 introduces Symbol  instances of which may be used as property names  To get the symbols of an object to enumerate over  use Object getOwnPropertySymbols  this function is why Symbol can t be used to make private properties   The new Reflect API from ECMAScript 2015 provides Reflect ownKeys  which returns a list of property names  including non-enumerable ones  and symbols   Array comprehensions  do not attempt to use   Array comprehensions were removed from ECMAScript 6 before publication  Prior to their removal  a solution would have looked like   const vals    for  key of Object keys obj   obj key        use vals array   ECMAScript 2017   ECMAScript 2016 adds features which do not impact this subject  The ECMAScript 2017 specification adds Object values and Object entries  Both return arrays  which will be surprising to some given the analogy with Array entries   Object values can be used as is or with a for-of loop   const values   Object values obj       use values array or   for  const val of Object values obj            use val     If you want to use both the key and the value  then Object entries is for you  It produces an array filled with  key  value  pairs  You can use this as is  or  note also the ECMAScript 2015 destructuring assignment  in a for-of loop   for  const  key  val  of Object entries obj            use key and val     Object values shim  Finally  as noted in the comments and by teh senaus in another answer  it may be worth using one of these as a shim  Don t worry  the following does not change the prototype  it just adds a method to Object  which is much less dangerous   Using fat-arrow functions  this can be done in one line too   Object values   obj   gt  Object keys obj  map key   gt  obj key      which you can now use like       one    two    three   var values   Object values   a   one   b   two   c   three        If you want to avoid shimming when a native Object values exists  then you can do   Object values   Object values     obj   gt  Object keys obj  map key   gt  obj key       Finally     Be aware of the browsers versions you need to support  The above are correct where the methods or language features are implemented  For example  support for ECMAScript 2015 was switched off by default in V8 until recently  which powered browsers such as Chrome  Features from ECMAScript 2015 should be be avoided until the browsers you intend to support implement the features that you need  If you use babel to compile your code to ECMAScript 5  then you have access to all the features in this answer

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If you have access to Underscore js  you can use the   values function like this     values  one   1  two   2  three   3       return  1  2  3

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You can loop through the keys   foo    one 1  two 2  three 3   for  key in foo       console log  foo    key        foo key        will output   foo one  1 foo two  2 foo three  3

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ECMA2017 onwards   Object values obj  will fetch you all the property values as an array   https   developer mozilla org en-US docs Web JavaScript Reference Global objects Object values

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in ECMAScript5 use   keys   Object keys object     Otherwise if you re browser does not support it  use the well-known for  in loop  for  key in object           your code here

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ES5 Object keys  var a     a  1  b  2  c  3    Object keys a  map function key   return a key         result   1 2 3

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Use   Object values    we pass in an object as an argument and receive an array of the values as a return value   This returns an array of a given object own enumerable property values  You will get the same values as by using the for in loop but without the properties on the Prototype  This example will probably make things clearer    x000D   x000D  function person  name    x000D    this name   name  x000D    x000D   x000D  person prototype age   5  x000D   x000D  let dude   new person  dude    x000D   x000D  for let prop in dude    x000D    console log dude prop           for in still shows age because this is on the prototype x000D                                    we can use hasOwnProperty but this is not very elegant x000D   x000D     ES6    x000D  console log Object values dude    x000D     very concise and we don t show props on prototype x000D   x000D   x000D

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var objects        this getAllvalues   function              var vls               for  var key in objects                vls push objects key                      return vls

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Object entries do it in better way       x000D   x000D    var dataObject     a    title   shop     b    title   home    x000D    x000D     Object entries dataObject  map itemArray   gt     x000D       console log  key    itemArray 0    value    itemArray 1   x000D       x000D   x000D   x000D

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Here s a function similar to PHP s array values    function array values input      var output       key         for   key in input     output output length    input key       return output      Here s how to get the object s values if you re using ES6 or higher   Array from values obj

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The question doesn t specify whether wanting inherited and non-enumerable properties also  There is a question for getting everything  inherited properties and non-enumerable properties also  that Google cannot easily find  If we are to get all inherited and non-enumerable properties  my solution for that is  function getAllPropertyNames obj        let result   new Set        while  obj            Object getOwnPropertyNames obj  forEach p   gt  result add p            obj   Object getPrototypeOf obj             return     result      And then iterate over them  just use a for-of loop   x000D   x000D  function getAllPropertyNames obj      let result   new Set      while  obj        Object getOwnPropertyNames obj  forEach p   gt  result add p        obj   Object getPrototypeOf obj         return     result      let obj       abc  123    xyz  1 234    foobar   hello      for  p of getAllPropertyNames obj   console log p   x000D   x000D   x000D

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Compatible with ES7 even some browsers do not support it yet  Since   Object values  lt object gt   will be built-in in ES7  amp   Until waiting all browsers to support it   you could wrap it inside a function     Object vals  o   gt  Object values  Object values o  Object keys o  map  k   gt o k     Then     Object vals  lastname  T  firstname  A          T   A     Once browsers become compatible with ES7  you will not have to change anything in your code

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For those early adapting people on the CofeeScript era  here s another equivalent for it   val for key val of objects   Which may be better than this because the objects can be reduced to be typed again and decreased readability   objects key  for key of objects

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Now I use Dojo Toolkit because older browsers do not support Object values   require   dojox lang functional object    function Object        var obj     key1   1   key2   2   key3   3         var values   Object values obj       console log values         Output      1    2    3

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By using a simple for  in loop   for var key in objects        var value   objects key

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Here s a reusable function for getting the values into an array  It takes prototypes into account too   Object values   function  obj        var vals           for  var key in obj             if   obj hasOwnProperty key                  vals push obj key                        return vals

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If you really want an array of Values  I find this cleaner than building an array with a for     in loop   ECMA 5 1   function values o    return Object keys o  map function k  return o k        It s worth noting that in most cases you don t really need an array of values  it will be faster to do this   for var k in o  something o k      This iterates over the keys of the Object o  In each iteration k is set to a key of o

[javascript] How to get all properties values of a JavaScript Object (without knowing the keys)?

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