nodejs timestamp where does "linux" code example

Example 1: How to get unix timestamp from tomorrow nodejs

var d = new Date();
d.setDate(d.getDay() - 1);
d.setHours(0, 0, 0);
d.setMilliseconds(0);
console.log(d/1000|0)

Example 2: nodejs current timestamp

Math.floor(new Date() / 1000)