codeup-web-exercises/konami.html at main · afonse03/codeup-web-exercises · GitHub

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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
  <title>Konami Code</title>
</head>
<body>
<h1>Konami Code</h1>

<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<script>
  "use strict";
  /*
  Steps:
  1. Keep track of what the user is typing
  2. Use the jquery keyup event which is called every time the user presses a key
  3. Use a variable that stores
  4. Clear input whenever user types something invalid
  5. To check if the input is invalid
   */

  const correctInput = "3838404037393739666513";
  var currentInput = "";
  // create an empty variable to keep track of user inputs

  // calls event listener whenever user presses a key
  $(document).keyup(function(event){
    // since this is a keyboard event we can use the keycode property of the event to check which key the user typed
    // update user input every time a key is pressed
    currentInput += event.keyCode;
    console.log(currentInput);
    // check if currentInput has any characters that are not in the correctInput
    // check if every character in the currentInput is in the correctInput

    // input is valid if the correctInput includes all of the currentInput
    // valid is a boolean
    const valid = correctInput.includes(currentInput);

    // input is correct if correctInput matches the currentInput
    const correct = correctInput === currentInput;

    if (correct) {
      alert("You have added 30 lives!");
    }
    if (!valid) {
      alert("Invalid code. Start over.");
      // set input back to empty so user can start typing the code again
      currentInput = "";
    }
    $("#input").html(currentInput);
  });


  //Albert's solution:
  // $(document).ready(function() {
  //   var code = [];
  //   var konamiCode = [38, 38, 40, 40, 37, 39, 37, 39, 66, 65, 13];
  //   $(document).keyup(function() {
  //     code.push(event.keyCode);
  //     if (code.slice(code.length - 11, code.length) === konamiCode) {
  //       alert("You now have 30 extra lives!")
  //     }
  //   });
  // });

</script>
  <!-- Optional JavaScript -->
  <!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

</body>
</html>