Generics are a TypeScript feature that some find confusing. Don't be confused anymore! The best way I know of to understand them is a concept from functional programming: identity. www.typenotes.io/notes/typesc... #TypeScript

TypeScript generics via the identity function - TypeNotes

How a one-line identity function explains what generics are for

typenotes.io

The TypeScript handbook suggests these are equivalent: let state: string = 'maine' let state = 'maine' Have you ever wondered how you could prove that's true? A brief exploration of contextual typing: www.typenotes.io/notes/inspec... #TypeScript

Inspecting TypeScript's inferred types - TypeNotes

How to inspect and understand TypeScript inferred types

typenotes.io

TSX is a tool I've been using in daily TypeScript exploration: $ npx tsx Install and run this program, and you'll enter a #TypeScript REPL! You'll need some additional techniques to get type-checking, though. My summary here: www.typenotes.io/notes/runnin...

Running TypeScript in a REPL with tsx - TypeNotes

How to run TypeScript in a REPL

typenotes.io

“Be conservative in what you do, be liberal in what you accept from others.” Primary keys from an API are a great opportunity to practice this principle. #TypeScript www.typenotes.io/notes/typing...

Typing liberal primary keys - TypeNotes

Applying the robustness principle to primary keys

typenotes.io

I often want the same #TypeScript string list in three places: runtime values, a state type, and function parameters. Duplicating a union by hand drifts out of sync quickly. Here's a solution I've found: `as const` combined with an indexed access type. www.typenotes.io/notes/union-...

Union type from array in TypeScript

How to turn a JavaScript array into a TypeScript union type

typenotes.io

Are you looking to get better at TypeScript / JavaScript, in small daily doses? 🚀 I'm building TypeNotes to take the real-world lessons I'm learning every day building TypeScript apps and distill them into short actionable tips and tricks. #TypeScript www.typenotes.io

TypeNotes

Practical notes for TypeScript devs

typenotes.io

Relative imports in #TypeScript can be useful. This relative import tells me these two files are located in same dir and meaningful to each other. More on this and my preferred alternative, path aliases, here: www.typenotes.io/notes/path-a...

Just finished "How to Open Source" by @schneems.bsky.social. Fantastic! Gave me the push to comment on an open issue. github.com/lodash/lodas... howtoopensource.dev

Added whitespace · Issue #5977 · lodash/lodash

Something like startCase("3d") seems to return 3 D instead of 3D

github.com

A small thing that's worked well for me in code reviews: commenting and approving at the same time when nothing is blocking. www.jakeworth.com/posts/on-com...

On commenting and approving pull requests

After reviewing a lot of pull requests, I’ve settled on a simple default: if my comments are all nitpicks, suggestions, questions, or non-blocking issues, I leave them and approve the PR at the same t...

jakeworth.com

I’m thinking about a weekly newsletter for SaaS CTOs (teams ~10–100 engineers): “3 tech trends you should care about (and what to do about them)” Format: - Act on this - Watch this - Ignore this Would you read that? If yes, reply or like this post, and I’ll send a first issue to a small group.

This is an enviable quality of great software engineers I've observed. If you're trying to level up, it might help. www.jakeworth.com/posts/gettin...

Getting It Right the First Time

There’s an enviable quality of great engineers I’ve known: they seem to get things right the first time. When you ask them to do something, and they say “It’s done”, it is, almost always. How?

jakeworth.com

Today I Learned: Rebuilds on Write With Nodemon #til https://jakeworth.com/tils/rebuilds-on-write-with-nodemon/

Today I Learned: MCP Stdio and Stdout #til https://jakeworth.com/tils/mcp-stdio-and-stdout/

Today I Learned: TSC Watch #til https://jakeworth.com/tils/tsc-watch/

Testing exception capturing, without crashing your app (Sentry example): www.jakeworth.com/tils/observa... #til #javascript

Observable Exceptions That Don't Crash

Throwing a JavaScript Error test to your observability tool? There’s a better way.

jakeworth.com

Today I learned that locally, the engines key of package.json is an advisory. But, we can change that! #til #javascript www.jakeworth.com/tils/npm-ins...

NPM Install "Engine Strict"

Suppose your package.json specifies a Node engine of <= 24. Will all engineers on your team use Node 24? Not necessarily, unless you use this one weird trick!

jakeworth.com

A very short blog post, generated from MCP. #mcp #til www.jakeworth.com/tils/hello-w...

Hello World from MCP!

Hello World! Today I’m posting a TIL using MCP (Model Context Protocol).

jakeworth.com

Today I learned about the input redirection operator. "my knowledge" < "this cool operator" 😎 www.jakeworth.com/tils/input-r...

Input Redirection Operator

I’ve been known to cat README.md | pbcopy a file. There’s a better way: the input redirection operator!

jakeworth.com

Two more TILs from me to close out the week! "Disable DRF Browsable API" 🐍 www.jakeworth.com/tils/disable...

Disable DRF Browsable API

Django Rest Framework includes a UI for interacting with your API. Here’s how to turn it off.

jakeworth.com

📈 Exciting TIL from yesterday! React 17 JSX transform lets you use JSX without explicitly importing React. www.jakeworth.com/tils/import-...

Import React and React 17 JSX Transform

I’ve written before about the two competing ways to import React, but after React 17, you don’t need either.

jakeworth.com

This year I’ve run over 25 Backlog Refinement meetings; here’s what I’ve learned. #scrum #agile www.jakeworth.com/posts/runnin...

Running Great Refinement Meetings

This year I’ve run over 25 Scrum refinement meetings; here’s what I’ve learned.

jakeworth.com

I used to be like: "I'm a Rails dev, so my blog *has* to be a Rails app!" Nowadays, I'd pick whatever is the absolute easiest tool for me to write, edit, and deploy.

This week I shipped something new on the website: a user manual for working with me. Have you ever made one of these? Was it useful? Share in the replies! www.jakeworth.com/user-manual/

User Manual

Working with me? Awesome! I built this user manual to share my working style and communication preferences. For those interested in building their own user manual, here’s the guide that helped me. 🧭 W...

jakeworth.com

Tonight is the Maine JS Meetup! Join us at Novare Res in Portland for an evening of ECMAScript-compliant conversation and socializing. 🍻 www.meetup.com/mainejs/even...

November Social at Novare Res!, Tue, Nov 11, 2025, 6:00 PM | Meetup

Join us at Novare Res in Portland for an evening of networking, socializing, and JavaScript! ⏰ Timeline 6:00 - 8:00 PM: Refreshments / networking 8:00 PM: Depart (or not;

meetup.com

It's the Hashrocket Starter Pack! "Follow all" for insights from some of the smartest, most interesting folks to ever walk the streets of Jax Beach. 🏝️ go.bsky.app/ArMALD4

🎉 Tuesday night, join us in the Old Port, Portland, Maine for an evening of socializing and JavaScript! Always a great group, and great conversation. www.meetup.com/mainejs/even...

November Social at Novare Res!, Tue, Nov 11, 2025, 6:00 PM | Meetup

Join us at Novare Res in Portland for an evening of networking, socializing, and JavaScript! ⏰ Timeline 6:00 - 8:00 PM: Refreshments / networking 8:00 PM: Depart (or not;

meetup.com

This week, we ran an experiment: entire team voting on tickets to be included in an upcoming release! It was interesting. Has anyone done this? What would you call it; participatory software planning?

🌲 I made a Bluesky Starter Pack of devs in Maine! We're a small community, and growing. Click that follow button, and let's get a conversation going! go.bsky.app/6WrdHtm

Testing a feature or bugfix, make sure you aren’t trying to "catch it passing." Okay: "Can I get it to work?" Better: "Does it ever fail, even if I stray from the happy path?"

"Being fast" matters at the org level, too. Fast organizations fix little things. They experiment instead of talking. They deploy fearlessly because they know they can recover quickly from mistakes.