is there anything wrong with this code

Question

is there anything wrong with this code

<!DOCTYPE html>
<html>
<head>
<title>Guess What</title>
</head>
<body>
<div id="page1">
<h1>Welcome to Guess What!</h1>
<p>
In this game, you will be presented with a question and three options to
choose from. Your goal is to select the correct answer and see how many
you can get right.
</p>
<button onclick="startGame()">Start Game</button>
</div>

<div id="page2" style="display: none">
<h2>Question: What is the capital of France?</h2>
<input type="radio" id="optionA" name="answer" value="Madrid" /> A)
Madrid<br />
<input type="radio" id="optionB" name="answer" value="Berlin" /> B)
Berlin<br />
<input type="radio" id="optionC" name="answer" value="Paris" /> C)
Paris<br />
<button onclick="submitAnswer()">Submit</button>
<button onclick="endGame()">End Game</button>
</div>

<script>
let correctAnswer = "Paris";

function startGame() {
document.getElementById("page1").style.display = "none";
document.getElementById("page2").style.display = "block";
<!DOCTYPE html>
<html>
<head>
<title>Guess What</title>
</head>
<body>
<div id="page1">
<h1>Welcome to Guess What!</h1>
<p>
In this game, you will be presented with a question and three options to
choose from. Your goal is to select the correct answer and see how many
you can get right.
</p>
<button onclick="startGame()">Start Game</button>
</div>

<div id="page2" style="display: none">
<h2>Question: What is the capital of France?</h2>
<input type="radio" id="optionA" name="answer" value="Madrid" /> A)
Madrid<br />
<input type="radio" id="optionB" name="answer" value="Berlin" /> B)
Berlin<br />
<input type="radio" id="optionC" name="answer" value="Paris" /> C)
Paris<br />
<button onclick="submitAnswer()">Submit</button>
<button onclick="endGame()">End Game</button>
</div>

<script>
let correctAnswer = "Paris";

// Function to start the game
function startGame() {
document.getElementById("page1").style.display = "none";
document.getElementById("page2").style.display = "block";
}

}

function submitAnswer() {
let selectedAnswer = document.querySelector(
'input[name="answer"]:checked'
).value;
if (selectedAnswer === correctAnswer) {
alert("Correct! The capital of France is Paris.");
} else {
alert("Incorrect. The correct answer is Paris.");
}
document.getElementById("page1").style.display = "block";
document.getElementById("page2").style.display = "none";
}

function endGame() {
document.getElementById("page1").style.display = "block";
document.getElementById("page2").style.display = "none";
}
</script>
</body>
</html>

Answer 1

There are a few issues with the code:

1. The script tag for the JavaScript code is placed after the closing body tag, which is not conventional. It is recommended to place the script tag in the head section or at the end of the body section.

2. The startGame function is defined twice within the script, which is unnecessary and can cause confusion. It should only be defined once.

3. Within the startGame function, there is an unnecessary line of code that includes a full HTML structure ("<DOCTYPE html>..."). This should be removed as it does not belong in a JavaScript function.

4. The submitAnswer function does not check if a radio button is selected before trying to get the value of the selected answer. This could result in an error if no radio button is selected. It's recommended to add a check to ensure a radio button is selected before attempting to get its value.

Overall, the code structure should be cleaned up and organized for better readability and functionality.

Answer 2

rewrite it

Answer 3

Sure, here is a revised version of the code with the mentioned issues addressed:

```html
<!DOCTYPE html>
<html>
<head>
<title>Guess What</title>
</head>
<body>
<div id="page1">
<h1>Welcome to Guess What!</h1>
<p>
In this game, you will be presented with a question and three options to
choose from. Your goal is to select the correct answer and see how many
you can get right.
</p>
<button onclick="startGame()">Start Game</button>
</div>

<div id="page2" style="display: none">
<h2>Question: What is the capital of France?</h2>
<input type="radio" id="optionA" name="answer" value="Madrid"/> A) Madrid<br/>
<input type="radio" id="optionB" name="answer" value="Berlin"/> B) Berlin<br/>
<input type="radio" id="optionC" name="answer" value="Paris"/> C) Paris<br/>
<button onclick="submitAnswer()">Submit</button>
<button onclick="endGame()">End Game</button>
</div>

<script>
let correctAnswer = "Paris";

function startGame() {
document.getElementById("page1").style.display = "none";
document.getElementById("page2").style.display = "block";
}

function submitAnswer() {
let selectedRadio = document.querySelector('input[name="answer"]:checked');
if (selectedRadio) {
let selectedAnswer = selectedRadio.value;
if (selectedAnswer === correctAnswer) {
alert("Correct! The capital of France is Paris.");
} else {
alert("Incorrect. The correct answer is Paris.");
}
endGame();
} else {
alert("Please select an answer before submitting.");
}
}

function endGame() {
document.getElementById("page1").style.display = "block";
document.getElementById("page2").style.display = "none";
}
</script>
</body>
</html>
```

In this revised version, I have removed the unnecessary lines of code, ensured the startGame function is defined once, added a check in the submitAnswer function to ensure a radio button is selected before getting its value, and cleaned up the code structure for better readability.