multiple-request-promise-all-settled.js

async function loadInitialData() {

    // fire and await together
    const [userResult, productResult, otherResult] = 
    await Promise.allSettled([
        fetchUser(), fetchProduct(), fetchOther()
    ])

    // process user
    if (userResult.status === 'rejected') {
        const err = userResult.reason
        handleError(err)
    } else {
        const user = userResult.value
    }

    // process product
    if (productResult.status === 'rejected') {
        const err = productResult.reason
        handleError(err)
    } else {
        const product = productResult.value
    }

    // process other
    if (otherResult.status === 'rejected') {
        const err = otherResult.reason
        handleError(err)
    } else {
        const other = otherResult.value
    }
}