Promise Chaining
Promise Chaining
Section titled “Promise Chaining”Introduction
Section titled “Introduction”Promise chaining sequences async operations where each step waits for the previous one to complete before starting.
Topics Covered
Section titled “Topics Covered”- Basic Chaining — How chaining works step by step
- Error Propagation — How errors flow through chains
- Returning Promises — Nesting vs flattening async operations
Learning Objectives
Section titled “Learning Objectives”- Understand how
.then()chains work - Know how errors propagate through chains
- Recognize when to flatten nested promises
Summary
Section titled “Summary”Each .then() receives the previous return value. Return a value or a promise. Errors skip to the nearest .catch(). Chains are flat, not nested.