Handling errors in JavaScript is crucial for writing robust and reliable code. There are several mechanisms and best practices for error handling in JavaScript:
-
Try…Catch Statement:
-
Use the
try...catch
statement to catch and handle exceptions. Code inside thetry
block is executed, and if an exception occurs, it’s caught and handled in thecatch
block.
-
Use the
-
Throw Statement:
-
You can throw your own custom errors or exceptions using the
throw
statement.
-
You can throw your own custom errors or exceptions using the
-
Finally Block:
-
The
finally
block is optional and is executed regardless of whether an exception is thrown or not.
-
The
-
Error Object:
-
The
Error
object contains information about the error, such as the error message (message
property) and the name of the error (name
property).
-
The
-
Global Error Handling:
-
You can set up a global error handler using the
window.onerror
event to catch unhandled exceptions globally.
-
You can set up a global error handler using the
-
Promises:
-
When working with asynchronous code using promises, you can use the
.catch()
method to handle errors.
-
When working with asynchronous code using promises, you can use the