leftIdentity.js

let value = 1;
let promise = Promise.resolve(value);
let wrapInPromise = (x) => Promise.resolve(x * 2);

const boxResult = await promise.then(wrapInPromise);
const wrapperResult = await wrapInPromise(value);

console.log(boxResult == wrapperResult);
// Should log as true ✅
// Thanks to top-level await 🤓