Ask HN: JavaScript tips and tricks

2 pointsby nodivbyzeroover 9 years ago

Hey hackers Let's share your javascript tips & tricks. For example:<p>~~2 === Math.floor(2); // true

2 comments

lepprover 9 years ago

<p><pre><code> window.addEventListener("beforeunload", function () { alert("You just won our user lottery! Sign-up for a FREE iPad!"); return false; }</code></pre>

lollipop25over 9 years ago

Array(3).fill('ha').join('');<p>Array(16).fill('na').join(' ') + ' Batmaaan!!!';