JavaScript Promises
are awesome, but they have a fundamental issue: When you use a Promise, you mix
up your asynchronicity-handling code with your error-handling code through
.catch. Unthrow fixes this, making you free to handle possible errors wherever
you want to.
Just wrap your calls to Promise-returning function which may fail with unthrow.
The result of an unthrowed call is a new Promise which will yield a Result.
A Result is a plain JavaScript object with a status field.
The value of the status field may be "Ok" or "Error".
If the value of status is "Ok", the Result will have a value field
containing the result of the promise. If the value of status
is "Error", the Result will have an error field containing the error
thrown by the promise.