Object keys in variables in JavaScript
Object keys can be stored in variables. Let's look at an example. Let's have the following object:
let obj = {a: 1, b: 2, c: 3};
Let the variable store the key:
let key = 'a';
Derive an object element by key:
console.log(obj[key]); // shows 1
Given the following object:
let obj = {x: 1, y: 2, z: 3};
The variable key is given,
which stores one of the keys of our object.
Use this variable to output the
corresponding element of the object.
