how to append array of object in javascript code example

Example 1: array.push

var vegetables = ['Capsicum',' Carrot','Cucumber','Onion'];
vegetables.push('Okra');
//expected output ['Capsicum',' Carrot','Cucumber','Onion','Okra']; 
// .push adds a thing at the last of an array

Example 2: how to add object to list in javascript

var a=[]
var b={};
a.push(b);