JAVASCRIPT

how to find the key of an value in an object

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


const map = {"first" : "1", "second" : "2"};
console.log(getKeyByValue(map,"2"));

js find key by value in object

Object.keys(object).find(key => object[key] === value)

How to Get Object Keys and Values in JavaScript

const myObj = {
  firstName: 'John',
  lastName: 'Duo',
  address: '1270.0.0.1'
}
const keys = Object.keys(myObj); // firstName, lastName, address
const values = Object.values(myObj); // John, Duo, 127.0.0.1

javascript object get value by key

const person = {
  name: 'Bob',
  age: 47
}

Object.keys(person).forEach((key) => {
  console.log(person[key]); // 'Bob', 47
});

get object key from value javascript

const key = Object.keys(obj).find(key => obj[key] === value);

how to get key from value in javascript

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


const map = {"first" : "1", "second" : "2"};
console.log(getKeyByValue(map,"2"));
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get key for value javascript

const findingKey = (obj , value) => (Object.keys(obj).find(key => value === obj[key]))
console.log(findingKey({id:"123",name:"Alice"},"Alice");

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]);