javascript - find nested object key by its value

Question

I\'m trying to find key of object which is containing my value.

There is my object:

var obj = {}

obj[\"post1\"] = {
    \"title\":    \"title1\",
    \         


        

Answer 1

You have to access the subkey of the object:

 function obk (obj, prop, val) {
   return Object.keys(obj).find(key => obj[key][prop] === val);
 }

 console.log(obk(obj, "title", "title2"));

Or you could search all values of the subobject:

 function obk (obj, val) {
   return Object.keys(obj).find(key => Object.values( obj[key] ).includes(val)); 
 }

 console.log(obk(obj, "title2"))