How do you use Future.wait safely with more than one async operation?

Short answer

Create or start the needed Futures and then pass them to Future.wait to collect the results, setting an error policy and not running operations that depend on a prior order.

Explanation

Future.wait waits on existing Futures and does not start work itself; use it when there is no dependency between requests, then handle the first error and the resources that have already started. Do not use it to parallelize CPU-bound work; Future scheduling does not create a new isolate.

Common mistakes

• Running operations that depend on a previous result inside Future.wait.
• Treating a Future.wait failure as an automatic cancellation of all other operations.

Follow-up questions

• How do async and await work with Future in Dart?

Sources

• Dart API — Future.wait