Javascript shorthand if

Question

if (event.keyCode === 38 || event.keyCode === 33 || event.keyCode === 40 || event.keyCode === 34) {
}

How to shorthand this code? Remember that con

Answer 1

You can use regular expressions, although I'm not sure if that's necessarily faster than a switch statement.

if (/^(38|33|40|34)$/.test(event.keyCode)) {
 // Some code here
}

Though it's much more readable than doing an object property look-up.