JavaScript Full Project Guess My Number [with Source Code]

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Implement a game rest functionality, so that the player can make a new guess! Here is how:

  1. Select the element with the β€˜again’ class and attach a click event handler
  2. In the handler function, restore initial values of the score and secretNumber variables
  3. Restore the initial conditions of the message, number, score and guess input field
  4. Also restore the original background color (#222) and number width (15rem)

Code:

HTML:

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <link rel="stylesheet" href="style.css" />
    <title>Guess My Number!</title>
  </head>
  <body>
    <header>
      <h1>Guess My Number!</h1>
      <p class="between">(Between 1 and 20)</p>
      <button class="btn again">Again!</button>
      <div class="number">?</div>
    </header>
    <main>
      <section class="left">
        <input type="number" class="guess" />
        <button class="btn check">Check!</button>
      </section>
      <section class="right">
        <p class="message">Start guessing...</p>
        <p class="label-score">πŸ’― Score: <span class="score">20</span></p>
        <p class="label-highscore">
          πŸ₯‡ Highscore: <span class="highscore">0</span>
        </p>
      </section>
    </main>
    <script src="script.js"></script>
  </body>
</html>

CSS:

style.css

@import url('https://fonts.googleapis.com/css?family=Press+Start+2P&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}

html {
  font-size: 62.5%;
  box-sizing: border-box;
}

body {
  font-family: 'Press Start 2P', sans-serif;
  color: #eee;
  background-color: #222;
  /* background-color: #60b347; */
}

/* LAYOUT */
header {
  position: relative;
  height: 35vh;
  border-bottom: 7px solid #eee;
}

main {
  height: 65vh;
  color: #eee;
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.left {
  width: 52rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.right {
  width: 52rem;
  font-size: 2rem;
}

/* ELEMENTS STYLE */
h1 {
  font-size: 4rem;
  text-align: center;
  position: absolute;
  width: 100%;
  top: 52%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.number {
  background: #eee;
  color: #333;
  font-size: 6rem;
  width: 15rem;
  padding: 3rem 0rem;
  text-align: center;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%, 50%);
}

.between {
  font-size: 1.4rem;
  position: absolute;
  top: 2rem;
  right: 2rem;
}

.again {
  position: absolute;
  top: 2rem;
  left: 2rem;
}

.guess {
  background: none;
  border: 4px solid #eee;
  font-family: inherit;
  color: inherit;
  font-size: 5rem;
  padding: 2.5rem;
  width: 25rem;
  text-align: center;
  display: block;
  margin-bottom: 3rem;
}

.btn {
  border: none;
  background-color: #eee;
  color: #222;
  font-size: 2rem;
  font-family: inherit;
  padding: 2rem 3rem;
  cursor: pointer;
}

.btn:hover {
  background-color: #ccc;
}

.message {
  margin-bottom: 8rem;
  height: 3rem;
}

.label-score {
  margin-bottom: 2rem;
}

JavaScript:

script.js

'use strict';

let secretNumber = Math.trunc(Math.random() * 20) + 1;
let score = 20;
let highscore = 0;

const displayMessage = function (message) {
  document.querySelector('.message').textContent = message;
};

document.querySelector('.check').addEventListener('click', function () {
  const guess = Number(document.querySelector('.guess').value);
  console.log(guess, typeof guess);

  // When there is no input
  if (!guess) {
    displayMessage('⛔️ No number!');

    // When player wins
  } else if (guess === secretNumber) {
    displayMessage('πŸŽ‰ Correct Number!');
    document.querySelector('.number').textContent = secretNumber;

    document.querySelector('body').style.backgroundColor = '#60b347';
    document.querySelector('.number').style.width = '30rem';

    if (score > highscore) {
      highscore = score;
      document.querySelector('.highscore').textContent = highscore;
    }

    // When guess is wrong
  } else if (guess !== secretNumber) {
    if (score > 1) {
      displayMessage(guess > secretNumber ? 'πŸ“ˆ Too high!' : 'πŸ“‰ Too low!');
      score--;
      document.querySelector('.score').textContent = score;
    } else {
      displayMessage('πŸ’₯ You lost the game!');
      document.querySelector('.score').textContent = 0;
    }
  }

});

document.querySelector('.again').addEventListener('click', function () {
  score = 20;
  secretNumber = Math.trunc(Math.random() * 20) + 1;
  displayMessage('Start guessing...');
  document.querySelector('.score').textContent = score;
  document.querySelector('.number').textContent = '?';
  document.querySelector('.guess').value = '';

  document.querySelector('body').style.backgroundColor = '#222';
  document.querySelector('.number').style.width = '15rem';
});

Paste All three Files in the Same Folder, and Open the Index.html. You will see the Project.

(OR)

Single HTML File: (All 3 in Single File)

HTML:

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Guess My Number!</title>

<style>
@import url('https://fonts.googleapis.com/css?family=Press+Start+2P&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}

html {
  font-size: 62.5%;
  box-sizing: border-box;
}

body {
  font-family: 'Press Start 2P', sans-serif;
  color: #eee;
  background-color: #222;
  /* background-color: #60b347; */
}

/* LAYOUT */
header {
  position: relative;
  height: 35vh;
  border-bottom: 7px solid #eee;
}

main {
  height: 65vh;
  color: #eee;
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.left {
  width: 52rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.right {
  width: 52rem;
  font-size: 2rem;
}

/* ELEMENTS STYLE */
h1 {
  font-size: 4rem;
  text-align: center;
  position: absolute;
  width: 100%;
  top: 52%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.number {
  background: #eee;
  color: #333;
  font-size: 6rem;
  width: 15rem;
  padding: 3rem 0rem;
  text-align: center;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%, 50%);
}

.between {
  font-size: 1.4rem;
  position: absolute;
  top: 2rem;
  right: 2rem;
}

.again {
  position: absolute;
  top: 2rem;
  left: 2rem;
}

.guess {
  background: none;
  border: 4px solid #eee;
  font-family: inherit;
  color: inherit;
  font-size: 5rem;
  padding: 2.5rem;
  width: 25rem;
  text-align: center;
  display: block;
  margin-bottom: 3rem;
}

.btn {
  border: none;
  background-color: #eee;
  color: #222;
  font-size: 2rem;
  font-family: inherit;
  padding: 2rem 3rem;
  cursor: pointer;
}

.btn:hover {
  background-color: #ccc;
}

.message {
  margin-bottom: 8rem;
  height: 3rem;
}

.label-score {
  margin-bottom: 2rem;
}

</style>
  </head>
  <body>
    <header>
      <h1>Guess My Number!</h1>
      <p class="between">(Between 1 and 20)</p>
      <button class="btn again">Again!</button>
      <div class="number">?</div>
    </header>
    <main>
      <section class="left">
        <input type="number" class="guess" />
        <button class="btn check">Check!</button>
      </section>
      <section class="right">
        <p class="message">Start guessing...</p>
        <p class="label-score">πŸ’― Score: <span class="score">20</span></p>
        <p class="label-highscore">
          πŸ₯‡ Highscore: <span class="highscore">0</span>
        </p>
      </section>
    </main>
    <script>
'use strict';

let secretNumber = Math.trunc(Math.random() * 20) + 1;
let score = 20;
let highscore = 0;

const displayMessage = function (message) {
  document.querySelector('.message').textContent = message;
};

document.querySelector('.check').addEventListener('click', function () {
  const guess = Number(document.querySelector('.guess').value);
  console.log(guess, typeof guess);

  // When there is no input
  if (!guess) {
    displayMessage('⛔️ No number!');

    // When player wins
  } else if (guess === secretNumber) {
    displayMessage('πŸŽ‰ Correct Number!');
    document.querySelector('.number').textContent = secretNumber;

    document.querySelector('body').style.backgroundColor = '#60b347';
    document.querySelector('.number').style.width = '30rem';

    if (score > highscore) {
      highscore = score;
      document.querySelector('.highscore').textContent = highscore;
    }

    // When guess is wrong
  } else if (guess !== secretNumber) {
    if (score > 1) {
      displayMessage(guess > secretNumber ? 'πŸ“ˆ Too high!' : 'πŸ“‰ Too low!');
      score--;
      document.querySelector('.score').textContent = score;
    } else {
      displayMessage('πŸ’₯ You lost the game!');
      document.querySelector('.score').textContent = 0;
    }
  }

});

document.querySelector('.again').addEventListener('click', function () {
  score = 20;
  secretNumber = Math.trunc(Math.random() * 20) + 1;
  displayMessage('Start guessing...');
  document.querySelector('.score').textContent = score;
  document.querySelector('.number').textContent = '?';
  document.querySelector('.guess').value = '';

  document.querySelector('body').style.backgroundColor = '#222';
  document.querySelector('.number').style.width = '15rem';
});
</script>
  </body>
</html>

Output:

Guess My Number Output
Starting Screen
Too High Guess
Too High Guess
Too Low Guess
Too Low Guess
Correct Number Guess
Correct Number Guess

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