Javascript get Object property Name

Question

I passed the following object   var myVar     typeA    option1   one   option2   two        I want to be able to pull out the key typeA from the above structure   This value can change each time so next time it could be typeB   So I would like to know if there is a way for me to do something like the following pseudo code   var theTypeIs   myVar key      This way when I can pass this object and I can pull out the first value of the object  in this case it is typeA and then based on that I can do different things with option1 and option2

User · Answer

If you want to get the key name of myVar object then you can use Object keys   for this purpose   var result   Object keys myVar     alert result 0      result 0  alerts typeA

User · Answer

If you know for sure that there s always going to be exactly one key in the object  then you can use Object keys   theTypeIs   Object keys myVar  0

User · Answer

Like the other answers you can do theTypeIs   Object keys myVar  0   to get the first key  If you are expecting more keys  you can use  Object keys myVar  forEach function k        if k      typeA                do stuff           else if  k      typeB                do more stuff           else              do something

User · Answer

I was searching to get a result for this either and I ended up with   const MyObject         SubObject             eu    0   asd   true  undefined            us    0   asd   false  null            aus    0   asd   false  0             For those who wanted the result as a string   Object keys MyObject SubObject  toString     output   eu us aus   For those who wanted the result as an array   Array from Object keys MyObject     output  Array   eu    us    aus    For those who are looking for a  contains  type method  as numeric result   console log Object keys MyObject SubObject  indexOf  k       output  -1  console log Object keys MyObject SubObject  indexOf  eu       output  0  console log Object keys MyObject SubObject  indexOf  us       output  3  as boolean result   console log Object keys MyObject SubObject  includes  eu       output  true    In your case    x000D   x000D  var myVar     typeA    option1   one   option2   two      x000D   x000D         Example 1 x000D      console log Object keys myVar typeA  toString        Result   option1  option2  x000D   x000D         Example 2 x000D      console log Array from Object keys myVar typeA        Result  Array   option1    option2    x000D       x000D         Example 3 as numeric x000D      console log  Object keys myVar typeA  indexOf  option1   gt  0   Exist    Does not exist        Result  Exist  x000D       x000D         Example 3 as boolean x000D      console log Object keys myVar typeA  includes  option2        Result  True  x000D       x000D         if you would like to know about SubObjects x000D      for var key in myVar   x000D           do smt with SubObject x000D        console log key      Result  typeA x000D        x000D   x000D         if you already know your  SubObject  x000D      for var key in myVar typeA   x000D           do smt with option1  option2 x000D        console log key      Result  option1    Result  option2 x000D        x000D   x000D   x000D

[javascript] Javascript get Object property Name

Examples related to javascript