I have a JavaScript error object that I have caught in code. It has a name, message, stack etc that I want to log at the backend. I am using sentry for that. But before logging I want to change the name or the message of the error.
What will be the best way to do it?
I tried creating a new error and adding the original error as cause
, but that did not work with sentry. It just logs the error passed as the cause of the new error.
new Error('Additional error message', { cause: originalError });
I need the rest of the properties of the error to remain the same, just need to change the name or message.
CodePudding user response:
A super helpful thing you can do to accomplish this is actually create your own custom error types. This can be done by simply using a class that extends the Error constructor, like so:
class MyError extends Error {
constructor(message) {
super();
this.name = "MyError";
this.message = message;
}
}
try {
throw new MyError('this is my error')
} catch (err) {
console.log(err instanceof Error);
console.log(err.message);
console.log(err.name);
console.log(err.stack);
}
class ExtendedError extends Error {
constructor(message, originalError) {
super();
this.name = "ExtendedError";
this.message = message;
this.originalError = {
name: originalError.name,
message: originalError.message,
stack: originalError.stack
};
}
}
try {
throw new Error('Something bad happened!');
} catch (err) {
let extendedError = new ExtendedError('Additional details', err);
console.log(extendedError instanceof Error);
console.log(extendedError.message);
console.log(extendedError.name);
console.log(extendedError.originalError);
console.log(extendedError.stack);
}
CodePudding user response:
You can create new Error
with name and pass second argument as error object.
const originalError = new Error('Additional error message', { cause: 'root cause' });
const newError = new Error('different error', originalError);
console.log(newError.cause)
console.log(newError.toString())