How to Handle Exceptions in JavaScript?

1. try：The try block wraps code that may throw errors. If the code within the try block throws an error, control is transferred to the immediately following catch block.

2. catch：When the code in the try block throws an exception, the catch block is executed. The catch block can accept a parameter representing the thrown error object.

3. finally：The finally block is always executed, regardless of whether an exception occurs. It is useful for cleaning up resources or executing necessary cleanup steps.

4. throw：The throw keyword is used to throw custom exceptions. You can throw an error object or other values to represent errors.

Besides these basic structures, JavaScript also supports using the Error object and its subtypes (such as SyntaxError, TypeError, etc.) to provide more information about errors. Additionally, you can use the .catch() method of Promise to handle exceptions that may occur in asynchronous code.