Prevent default keypress behavior

input.js

@@ -1,5 +1,5 @@
 const input = {};
 
-document.addEventListener('keydown', ({key}) => input[key] = true);
-document.addEventListener('keyup', ({key}) => input[key] = false);
+document.addEventListener('keydown', (e) => {input[e.key] = true; e.preventDefault()});
+document.addEventListener('keyup', (e) => {input[e.key] = false; e.preventDefault()});
 export function key(key) {return input[key]}