gistfile1.txt

"use strict";

function fetch(uri) {
    throw new Error("synchronous");
}

function sync() {
    return fetch('http://stuff');
}

async function async1() {
    return await fetch('http://stuff');
}

function async2() {
    return new Promise((resolve, _reject) =>
            resolve(fetch('http://stuff'));
    );

}

async function test(f) {
    try {
        f()
        .catch(err => console.log(`caught rejected promise from ${f.name}`));
    } catch (_) {
        console.log(`caught synchronous error from ${f.name}`);
    }
}

[sync, async1, async2].forEach(f => test(f));

/* Output:
caught synchronous error from sync
caught rejected promise from async1
caught rejected promise from async2
*/