shortcutblocker/scripts/shortcutblocker.js

// Yep, that's it. Just 5 lines of code. That's my module. Not more, not less...
// Thank you for coming to my ted talk

// Define a new setting which can be stored and retrieved


//This hook allows us to only register the settings AFTER the settings are available. (Cant have a sword without a grip...)
Hooks.on("init", async function() {
  const heldKeys = [];


  //This registers the settings
  game.settings.register('shortcutblocker', 'ctrlblock', {
          name: 'Blocked CTRL Combos', //Kinda obvious, eh?
          hint: 'Comma sepparated list of keys, which are disallowed to be used with CTRL. Example: "F5, R, W" This would allow CTRL + F5, CTRL + R and CTRL + W.', // Some descriptive text.
          scope: 'client', // "world" = sync to db, "client" = local storage
          config: true, // false if you dont want it to show in module config
          type: String, // Number, Boolean, String, Object
          default: "t, r, f5",
          onChange: value => { // "value =>" means, that the value will be passed through.... I think
              debounceReload()
          }
      }),

      //SPIEL DEN SELBEN SONG NOCHMAL!
      game.settings.register('shortcutblocker', 'altblock', {
          name: 'Blocked ALT Combos',
          hint: 'Comma sepparated list of key names. Example:  "F4". That would block "ALT + F4"',
          scope: 'client',
          config: true,
          type: String,
          default: "f12",
          onChange: value => {
              debounceReload()
          }
      }),

      // There probably is a smoother way of doing this, but I cannot be bothered to google for that
      game.settings.register('shortcutblocker', 'shiftblock', {
          name: 'Blocked SHIFT Combos',
          hint: 'Comma sepparated list of keys, which are allowed to be used with SHIFT. Example: "F5, R, W" This would allow SHIFT + F5',
          scope: 'client',
          config: true,
          type: String,
          default: "f5",
          onChange: value => {
              debounceReload()
          }
      }),

      // Fire this event, once, ANY key is pressed.
      window.addEventListener("keydown", (e) => {
          if (heldKeys.includes(e.key)) {
            
          } else {
          heldKeys.push(e.key);

          //Get the current set variables
          const ctrlButtons = game.settings.get('shortcutblocker', 'ctrlblock');
          const altButtons = game.settings.get('shortcutblocker', 'altblock');
          const shiftButtons = game.settings.get('shortcutblocker', 'shiftblock');

          //Create Replace any spaces.
          const shiftButtonSpaceless = shiftButtons.replace(/\s/g, '')
          const altButtonSpaceless = altButtons.replace(/\s/g, '')
          const ctrlButtonSpaceless = ctrlButtons.replace(/\s/g, '')

          // Create the arrays
          const shiftButtonArray = shiftButtonSpaceless.split(',');
          const altButtonArray = altButtonSpaceless.split(',');
          const ctrlButtonArray = ctrlButtonSpaceless.split(',');
          
          // Now. Look, if it's a keyboard combination.
          // e.ctrlKey is obviously the Control key
          // e.altKey is obviously the Alt Key
          // e.key binds directly to whatever key is currently beeing pressed
          // !isNan("Something") tests, if "Something" is a number. [NaN, Not a Number ;)]
          if (e.ctrlKey && ctrlButtonArray.includes(e.key) || e.altKey && altButtonArray.includes(e.key)|| e.shiftKey && shiftButtonArray.includes(e.key)){
            console.log("shortcutblocke: Catched keystroke! Aborting!");  
              // Disables the shortcuts in the browser...
              // gonna be honest, didn't read the docs... copy, paste and pray.
              // https://developer.mozilla.org/en-US/docs/Web/API/Event/preventDefault
              e.preventDefault();
              e.stopImmediatePropagation();
              e.stopPropagation();
            }
         }
      });
      // This event just helps us get rid of non-held keys.
      window.addEventListener("keyup", (e) => {
        var index = heldKeys.indexOf(e.key);
        if (index !== -1) {
          heldKeys.splice(index, 1);
        }
      });
  // This works for Chrome. It works for Mozilla... I guess? I dunno why you read this but ye :)



});