Another method of writing code

Question

I write code to JavaScript. I need to handle multiple keys when pressed. The result of such a code.

var key = event.keyCode;
if (key === 39 {
      //some code
    }

if (key === 40) {
      //some code
    }

if (key === 38) {
      //some code
    }

if (key === 13) {
     //some code
}

I do not like this method, if there is another beautiful way? in the style of object-oriented programming? Thanks

Answer 1

JavaScript is not an object oriented language per se.

What you could do is make a mapped object.

const obj = {
    "39" : () => { //do this },
    "40" : () => { //do this },
    "38" : () => { //do this },
    "13" : () => { //do this }
}

Then, when your event code comes in... use const whatever = obj[event.keyCode]();

I also believe that some form of destructuring can make this even fancier, but I'd have to brush up on it.