Buggy App
About this app
This app showcases 4 intentional bugs and errors for demonstrative purposes.
Buggy App Welcome to the Buggy App This app demonstrates some common bugs and errors in JavaScript! Click Me for Bugs
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Source
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Buggy App</title>
<meta name="description" content="This app showcases 4 intentional bugs and errors for demonstrative purposes.">
<meta name="keywords" content="bugs, errors, javascript, web app, buggy app">
<!-- Libraries -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.min.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.6.0/css/fontawesome.min.css" crossorigin="anonymous">
<script type="text/javascript">
try {
// App Javascript Goes Here. Place your entire script content inside the try block for error handling.
// This will run when the DOM is ready.
document.addEventListener("DOMContentLoaded", function() {
// Bug 1: Reference Error in console - variable 'undefinedVar' is not defined
console.log(undefinedVar);
// Bug 2: Misspelled function name causing an error (should be 'addNumbers')
console.log(addNmbers(5, 10)); // Uncaught ReferenceError: addNmbers is not a function
// Bug 3: Intentional infinite loop
let num = 0;
while (num < 10) {
console.log("Counting: " + num);
// increase num at some point could lead to infinite loop here!
}
// Bug 4: Attempting to execute a function that never gets defined
undefinedFunction(); // Uncaught ReferenceError: undefinedFunction is not defined
});
} catch (error) {
// This will throw the error to the parent window.
throw error;
}
</script>
<style>
body {
background-color: #f0f8ff;
color: #333;
}
h1 {
color: #3498db;
transition: color 0.3s;
}
h1:hover {
color: #e74c3c;
}
.btn-error {
background-color: #e74c3c;
color: white;
}
</style>
</head>
<body>
<div id="main-container" class="container">
<h1 class="text-center mt-5">Welcome to the Buggy App</h1>
<p class="text-center">This app demonstrates some common bugs and errors in JavaScript!</p>
<div class="text-center my-5">
<button class="btn btn-error">Click Me for Bugs</button>
</div>
</div>
</body>
</html>
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