how to iterate through properties in object in javascript code example

Example 1: loop over keys in object javascript

Object.keys(obj).forEach(function(key) {
  console.log(key, obj[key]);
});

Example 2: going through every attributes of an object javascript

let a = {x: 200, y: 1}
let attributes = Object.keys(a)
console.log(attributes)
//output: ["x", "y"]