Is there a more concise way to write this code in JS, CSS, or HTML programming?

Seeking advice on JS / CSS / HTML programming!

I may not be the best at articulating my question, so I apologize for any confusion. Let me clarify my intention behind this specific code section and explore potential solutions.

The goal is to allow users to input characters that will later be used in the characters variable within the create_random_string() function.

If possible, how can the code within the document.addEventListener() section be optimized for efficiency? Any insights would be greatly appreciated! Thank you!

var characters = '';
function create_random_string(string){
  var random_string = '';
  for (var i, i = 0; i < string; i++) {
     random_string += characters.charAt(Math.floor(Math.random() * characters.length));
  }
  return random_string; 
} 

document.addEventListener('keydown', function(event) {
  if(event.key == "a") {
    characters += "a";
  }
  else if(event.key == "b") {
    characters += "b";
  }
  else if(event.key == "c") {
    characters += "c";
  }
...
  else if(event.key == "x") {
    characters += "x";
  }
  else if(event.key == "y") {
    characters += "y";
  }
  else if(event.key == "z") {
    characters += "z";
  }

Answer №1

Have you considered checking for a variety of keys:

window.addEventListener('keypress', function(event) {
  if (event.key >= 'A' && event.key <= 'Z'){
    console.log(event.key);
  }

Answer №2

f represents the Function Object. The property .name can be used to retrieve the name of a function. When testing functions, ensure you call the function first before analyzing its behavior.

function myFunction() {
  console.log(myFunction.name);
}

myFunction();

Answer №3

Here's a concise solution that takes minimal code:

document.onkeydown = (e) => console.log(e.key);

An inline function is used to make the answer even shorter, as suggested by zer00ne.

If your focus is on form validation rather than just logging input to the console, you can implement something like this:

function alphaOnly(event) {
  let key = event.keyCode;
  return ((key >= 65 && key <= 90) || key == 8);
};

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