ES6+ Asynchronous Programming and Practical Error Handling
summary
Shows a concrete ES6+ example that sums image heights where loadImage returns a Promise but wrong URLs and unordered load events cause missing heights and retries that produce duplicate side effects (double POSTs). Presents a rewrite that passes dependencies as arguments, uses Promise/async–await composition and a small resolver/channel pattern to sequence calls, and argues that composing pure async functions while allowing errors to bubble yields simpler, more reliable error handling and global failure reporting.
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chapters (8)
- 0:00ES6+ async intro
- 4:03Image heights with Promises
- 8:31Error handling matters
- 14:52Async error handling
- 21:18Pure functions and errors
- 28:36Error handling best practices
- 33:23Functional error handling
- 37:50Q&A
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