how to use push js code example

Example 1: javascript array push

var SomeRandomArray = [];
SomeRandomArray.push("Hello, world!");

Example 2: push.js

Push.create("Hello world!", {
    body: "How's it hangin'?",
    icon: '/icon.png',
    timeout: 4000,
    onClick: function () {
        window.focus();
        this.close();
    }
});