Promise.all & Promise.allSettled

The Cost of Sequential awaits

Promises Start When Created, Not When Awaited

Promise.all

Collect Multiple Results With Promise.all

Promise.all Rejects if Any Promise Fails

Promise.all Check

Promise.allSettled

Inspect Every Outcome With Promise.allSettled

Separate Successes From Failures

Promise.allSettled Check

Lesson 9 Review