Node.js converting date string to unix timestamp

Question

I'm attempting to convert a Date String to a unix timestamp in Node.js.

My code below works perfectly on my client but when I run it on my server I get an error:

(node:19260) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: input.substring is not a function

My code:

function dateParser(input) {
    // function is passed a date and parses it to create a unix timestamp

    // removing the '.000' from input
    let finalDate = input.substring(0, input.length - 4);
    return new Date(finalDate.split(' ').join('T')).getTime();
}

Example of my input would be 2017-09-15 00:00:00.000

So why does the above work on my client but not in Node, and how would I duplicate the functionality in node?

Answer 1

Create a date object from your input DateTime string and then use getTime() and divide the result with 1000 to get the UNIX timestamp.

var unixTimestamp = Math.floor(new Date("2017-09-15 00:00:00.000").getTime()/1000);
console.log(unixTimestamp);