more than 500 points
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JavaScript Promises: All, AllSettled, Any, Race, and Concurrency Patterns
Promises are central to modern JavaScript, but most developers use only the basics. Firefox fully implements the Promise specification and the full Promise static API.
- Promise.all waits for all promises to resolve, returning an array of results.
- Promise.allSettled provides status and value/reason for each settled promise.
- Promise.mapWithConcurrency limits concurrent async operations to a specified concurrency level.