How to set or update or push the values into Object in javacript

Object Basics

Here the values push to the object

var arr = []; // Declare the array
arr.push('value');

Here the value set into the object

arr[1].name = 'test';
console.log(arr[1].name);

Here the initilize the object

var var ={'id':1,'name':'test'};
console.log(var);

Display the all names from the object

var arr = [{name: 'test1'},{name: 'test2'}];
for(var i=0;i<arr.length;i++){
     console.log(arr[i].name+'<br>');
}