Simple example

promises_async_await_reject.js

async function someFunc() {
    const somePromise = new Promise((resolve, reject) => {
        resolve('cool ' + Math.random())
    })

    // return Promise.reject(new Error('bs!')) // Could reject
    // throw new Error('yowza')    // or could throw

    return somePromise
}

someFunc().then((result) => {
    console.log('promise with .then resolved to:', result)
}).catch(e => {
    console.log('1st err:', e)
})

;(async () => {
    try {
        const result = await someFunc()
        console.log('await resolved promise to:', result)
    } catch (e) {
        console.log('2nd err:', e)
    }
})()