js can you have an object in an objecty code example

Example 1: object inside object javascript

var obj = {
  prop1: 5,
  obj2: {
    prop1: [3, 6, 3],
    prop2: 74,
    prop3: {
      str: "Hello World"
    }
  }
};

console.log(obj.obj2.prop3.str); //output: "Hello World"

Example 2: objects in javascript

let car = {
  engineNumber: 1234
  brand: 'BMW',
  break: function (){}
}