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Day 3: Throw
Day 3: Throw
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Difference between throw() & throw new Error()
In JavaScript, both
throw
andthrow new Error()
are used to raise and throw exceptions, but there is a difference in how they can be used and the information they provide:1.
throw
: -throw
is a simple statement used to throw an exception without providing any additional information about the error. - You can usethrow
to throw a custom error message or any value that you want, but it's not specifically designed for structured error handling.Example:
javascript throw "This is a custom error message";
2.
throw new Error()
: -throw new Error()
is a more structured way to throw exceptions in JavaScript. It creates an instance of theError
object, which contains a message and a stack trace, making it easier to identify and debug errors. - You can provide a descriptive error message as an argument to theError
constructor to explain the nature of the error.Example:
javascript throw new Error("This is a custom error message with a stack trace");
When you use
throw new Error()
, it's often easier for developers to track down the source of the error, as it provides a stack trace that shows where the error occurred in the code. This can be very helpful for debugging and error tracking.In general, it's recommended to use
throw new Error()
or other built-in error types (e.g.,RangeError
,TypeError
, etc.) when you want to raise exceptions, as it provides more information about the error and makes debugging easier. However, you can usethrow
for simpler cases or to throw non-Error objects when needed.