Colin McDonnell colinhacks

The Ultimate ESLint and Prettier setup

Featuring:

TypeScript support
Prettier auto-formatting
auto-removal of unused imports
auto-sorting of all imports
auto-consolidation of imports

Install deps

Achieving the Holy Grail of TypeScript Data Modeling Or, a scalable solution to type complexity

For the highly abbreviated version of this, check out this comment: colinhacks/zod#53 (comment). That comment conveys why this is so exciting. If you agree then the outline below explains the context for why I think it’s so exciting and introduces a the architectural concept of “ground truthiness” which I think is a very powerful notion.

Context

This journey started in 2018 when I decided to start a company. For inexplicable reasons I decided to build an electronic medical record software, one of the most regulated and complex product categories in the world. Also I was a solo founder. Now if you’re ever tempted to do this, for the love of god, don’t. Just say no!

Since this was medical software so I wanted it to be rock solid — end to end typesafety, powerful and expressive endpoints, painless schema migration. I was deeply entrenched in vanilla JavaScript development,

	import { renderToString } from "react-dom/server";

	const router = new Bun.FileSystemRouter({
	style: "nextjs",
	dir: "./pages",
	});

	Bun.serve({
	port: 3000,
	development: true,

	{
	"name": "sayhi",
	"module": "index.ts",
	"type": "module",
	"dependencies": {
	"cowsay": "^1.5.0"
	},
	"scripts": {
	"hi": "echo 'hi'"
	}

	# requires hyperfine and Bun v0.7 or later
	# https://github.com/sharkdp/hyperfine

	git clone [email protected]:colinhacks/zod.git
	cd zod
	bun install
	hyperfine --warmup 3 --runs 10 \
	"bun test src" \
	"npx vitest --config configs/vitest.config.ts" \
	"npx jest -c configs/babel-jest.config.json" \

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8" />
	<title>user/repo</title>
	<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
	<meta
	name="description"
	content="This is a description of user/repo"
	/>

	// keybindings.json
	// Command Pallette > Open Keyboard Shortcuts (JSON)
	[

	{
	"key": "cmd+shift+l",
	"command": "editor.action.insertSnippet",
	"when": "editorTextFocus",
	"args": {
	"snippet": "console.log(${TM_SELECTED_TEXT}$1)$0;"

	type Generics = Partial<{
	asdf:string;
	qwer : number;
	}>

	type Defaults = Required<{
	asdf: 'default';
	qwer: 1234;
	}>;

	type GlobalCtx = {
	session: {
	authorize(): void;
	};
	};

	type LoginInputType = {
	email: string;
	};

	import * as z from 'zod';

	type isAny<T> = [any extends T ? 'true' : 'false'] extends ['true']
	? true
	: false;
	type nonoptional<T> = T extends undefined ? never : T;
	type nonnullable<T> = T extends null ? never : T;
	type equals<X, Y> = [X] extends [Y] ? ([Y] extends [X] ? true : false) : false;

	export type toZod<T> = {