get element by key javascript code example

Example 1: getkey by value js

function getKeyByValue(object, value) {
  return Object.keys(object).find(key => object[key] === value);
}

Example 2: get keys of dictionary js

// Get keys of a dictionary
let dict = { a:1 , b:2 , c:3 }

console.log( Object.keys(dict) ) // expected output : ['a', 'b', 'c']

Example 3: javascript object get value by key

var obj = {
   a: "A",
   b: "B",
   c: "C"
}

console.log(obj.a);  // return string : A

var name = "a";
console.log(obj[name]);