What debugging pattern is demonstrated in this code?
if (user.age < 0) {
debugger;
console.error('Invalid age value');
handleError();
}
This code demonstrates conditional debugging: 1) The debugger statement is triggered only under specific conditions, 2) Helps investigate problematic code paths when they occur, 3) Combines error handling with debugging capabilities, 4) Allows inspection of the program state when invalid conditions are met, 5) More efficient than unconditional breakpoints, 6) Useful for debugging edge cases and error conditions, 7) Enables targeted debugging of specific scenarios, 8) Common pattern for debugging validation logic and error handlers.