What security considerations should be taken into account when using JavaScript for math exercises that involve visible code?

When using JavaScript for math exercises that involve visible code, it is important to consider security risks such as injection attacks or exposing sensitive information in the code. To mitigate these risks, one should sanitize user input to prevent malicious code execution and avoid displaying any sensitive information in the code that could be exploited by attackers. 

<?php
// Sanitize user input before using it in JavaScript code
$user_input = filter_input(INPUT_POST, 'user_input', FILTER_SANITIZE_STRING);

// Display math exercise with sanitized user input
echo "<script>document.write('2 + 2 = " . $user_input . "');</script>";
?>

Keywords

Cross-site scripting Sanitization Content Security Policy Input validation Secure coding practices

Related Questions