Reference Highlights Summary

Every highlight bullet from the 12 pages in this section, gathered on one page and grouped by the page it came from.

Modules and Imports

• ESM Named Export
• Default Export Import
• Dynamic import
• createRequire from ESM
• package.json type module

Buffers and Encoding

• Buffer from String
• alloc vs allocUnsafe
• Byte Length of String
• Slice vs subarray
• Base64 Hex Encode

Streams and Pipelines

• Readable from Iterable
• pipeline Promise
• Transform Map Chunks
• Backpressure write
• Finished Helper

Events and EventEmitter

• Emit and on
• once Promise
• error Event Convention
• removeListener Cleanup
• EventEmitter Async

Filesystem and Path

• readFile writeFile
• createReadStream
• mkdir recursive
• path join resolve
• fileURLToPath

HTTP and Fetch

• http createServer
• fetch JSON GET
• fetch POST JSON
• Request headers
• Undici Agent note

Process and Workers

• process env argv
• spawn Child
• execFile Promise
• Worker Thread
• parentPort Message

Async Patterns

• async await Basics
• Promise all Settled
• AbortSignal Timeout
• map with concurrency
• Async Iterator

Errors and Debugging

• Error cause Chain
• Custom Error Class
• assert strict
• NODE_DEBUG
• stack Trace Limit

CLI Env and Config

• parse argv flags
• dotenv pattern
• config from JSON
• stdin pipeline CLI
• exit codes

Testing with Node

• test and assert
• subtest Nested
• mock fn
• fake timers
• skip and only

Performance Diagnostics

• performance now
• perf_hooks histogram
• memoryUsage Sample
• CPU profile flag
• avoid sync fs