Untitled

const button = document.querySelector('button')

function listDirecotriesAsync(path = '') {
    return new Promise((resolve, reject) => {
        listDirectory(
            path, 
            (response) => {
                resolve(response)
            },
            (error) => {
                reject(error)
            }
        })
    })
}

// asynchronous way
async function mainAsync () {
    disableButton()
    const requests = ['pathA', 'pathB', 'pathC'].map(listDirectoriesAsync)
    await Promise.all(requests)
    enableButton()
}

// synchronous way 
function main () {
    disableButton()
    const requests = ['pathA', 'pathB', 'pathC'].map(listDirectoriesAsync)
    await Promise.all(requests).then(enableButton)
}

function disableButton() {
    button.disabled = true
}

function enableButton() {
    button.disabled = false
}