how to make an object in javascript

1var obj = {
2  prop1: 5,
3  obj2: {
4    prop1: [3, 6, 3],
5    prop2: 74,
6    prop3: {
7      str: "Hello World"
8    }
9  }
10};
11
12console.log(obj.obj2.prop3.str); //output: "Hello World"

1let object = {
2  'key1': 'value1',
3  'key2': 'value2',
4  'keyn': 'valuen',
5};
6console.log(object);

1let obj = {
2// fields
3  name:"value",
4  num: 123,
5//methods
6  foo: function(){}
7  
8}

1let car = {
2  engineNumber: 1234
3  brand: 'BMW',
4  break: function (){}
5}

1let myDog = {		
2  legs: value			
3
4}
5  console.log(myDog);
6/*Doesn't have to be a Dog it can be anyting you want*/

1class ObjectLayout {
2	constructor() {
3    	this.firstName = "Larry"; //property
4    }
5  
6  	sayHi() { // Method
7    	return `Hello from ${this.firstName}`;
8    }
9}
10
11const object = new ObjectLayout();
12// object.firstName is Larry;
13// object.sayHi() gives "Hello from Larry"