Create a seconds countdown in 6 lines of JavaScript (with time unit)

https://tonnygaric.com/blog/create-a-seconds-countdown-in-6-lines-of-javascript

HTML

<span id="countdown"></span>

JavaScript

var seconds = 10, $seconds = document.querySelector('#countdown');
(function countdown() {
    $seconds.textContent = seconds + ' second' + (seconds == 1 ?  '' :  's')
    if(seconds --> 0) setTimeout(countdown, 1000)
})();