add timestamp js code example

Example 1: js timestamp

var timestamp = new Date().getTime();

Example 2: javascript timestamp in seconds

const ts = () => Math.floor(new Date().getTime() / 1000);

Example 3: javascript get timestamp

var currentTimeInSeconds=Math.floor(Date.now()/1000); //unix timestamp in seconds
var currentTimeInMilliseconds=Date.now(); // unix timestamp in milliseconds

Example 4: angular get current timestamp

var currentTimeInSeconds=Math.floor(Date.now()/1000); //unix timestamp in seconds
var currentTimeInMilliseconds=Date.now(); // unix timestamp in milliseconds