I'm just playing around with async/await in node and it seems that if you're awaiting a promise and it gets rejected that it throws. I'm wondering if there is a cleaner pattern than going back to try/catch blocks that I'm not aware of?
async function foo() {
const val = await Promise.reject();
}
try/catch() is the cleaner pattern, aligning synchronous and asynchronous error handling:
(Works in Chrome and Firefox Developer Edition at the moment)
function a(heads) {
if (heads) throw new Error("Synchronous error");
}
async function b() {
await Promise.resolve();
throw new Error("Asynchronous error");
}
async function main(heads) {
try {
a(heads);
await b();
} catch (e) {
console.log(e.message);
}
}
main(false); // Synchronous error
main(true); // Asynchronous error
fs.accessthrows if you can't access a file, but this is the appropriate way to check if you have access).try/catchis meant for unexpected errors, not expected ones.