javascript get timestamp

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

new Date().getTime()

new Date().valueOf()

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

const currentTimeInMilliseconds=Date.now(); // unix timestamp in milliseconds

var today = new Date().toLocaleDateString(undefined, {
    day: '2-digit',
    month: '2-digit',
    year: 'numeric',
    hour: '2-digit',
    minute: '2-digit',
    second: '2-digit'
})

Math.floor(Date.now() / 1000)

const start = Date.now(); 
/*gives the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC.*/

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

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