Async Iteration

A for...of loop does not wait for promises. Given an array of pending promises, it prints the promise objects themselves, not their values:

Promise { <pending> }
Promise { <pending> }
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The first loop runs synchronously and finishes before either promise is fulfilled. Node.js prints a pending promise as Promise { <pending> }; a browser console shows it in a slightly different form. The second loop is written for await...of. It awaits each item before the loop body runs, so the body receives the values. Like await, `for await...of

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