How do you display JavaScript datetime in 12 hour AM/PM format?

Question

How do you display a JavaScript datetime object in the 12 hour format (AM/PM)?

Answer 1

Here's a way using regex:

console.log(new Date('7/10/2013 20:12:34').toLocaleTimeString().replace(/([\d]+:[\d]{2})(:[\d]{2})(.*)/, "$1$3"))
console.log(new Date('7/10/2013 01:12:34').toLocaleTimeString().replace(/([\d]+:[\d]{2})(:[\d]{2})(.*)/, "$1$3"))

This creates 3 matching groups:

• ([\d]+:[\d]{2}) - Hour:Minute
• (:[\d]{2}) - Seconds
• (.*) - the space and period (Period is the official name for AM/PM)

Then it displays the 1st and 3rd groups.

WARNING: toLocaleTimeString() may behave differently based on region / location.