Wait all localStorage done with promise

Promise_localStorage.js

const localSet = (key, value) => {
    return new Promise(resolve => {
        resolve(localStorage.setItem(key, value))
    })
}

Promise.all([
    localSet('KeyA', 'ValueA'),
    localSet('KeyB', 'ValueB'),
    localSet('KeyC', 'ValueC')
]).then(()=>{
    console.log(localStorage)
})