Summary: It’s About Time

Key points

• The UNIX epoch is an arbitrary date of January 1, 1970, that computer languages use as a reference point to measure how much time has elapsed.

• Most programming languages have a Date object that allows you to store dates and times in various formats.

• The setTimeout() method calls a callback after a number of milliseconds provided as an argument.

• Asynchronous programming means that code can be executed out of order. It stops long processes blocking the flow of code while the program is waiting for them to complete.

• The setInterval() method repeatedly calls a callback every time a given time interval has passed.

• JavaScript can be used to add interactivity to CSS animations.

We’ve now reached the end of the last practical chapter in this course. But there’s still one more chapter to go—one that will hopefully inspire you on to the next phase of your coding journey. But, as always, we have a quiz and challenge first.