TypeScript quickstart: 5-minute local dev environment
The shortest path to getting TypeScript running — a minimal starting point for first-time users.
Quick answer
How do I configure TypeScript strict mode?
Turn on strict and verbatimModuleSyntax. Fix any debt before upgrading TS majors so any does not spread.
Machine-readable page data: /data/typescript-quickstart.json
In-depth analysis
TypeScript adds static typing to JavaScript and acts as an engineering guardrail for large frontends and edge functions. It is a first-class citizen in Astro and Vite, catching most runtime errors at compile time. The fastest path to a win is one command to scaffold, start dev, edit a line, and see hot reload.
// tsconfig.json — strict baseline
{
"compilerOptions": {
"strict": true,
"verbatimModuleSyntax": true,
"moduleResolution": "bundler",
"target": "ES2022"
}
}TypeScript Quickstart · Key takeaways
- Node ≥ 20.19 and pnpm ready
- Official scaffold initialized
- Dev hot reload works
- First local page reached
FAQ & pitfalls
Why does TypeScript complain about circular dependencies?
With verbatimModuleSyntax, type imports must use import type, otherwise bundling reports circular dependencies. Tighten module boundaries.
Explore the hub
See all 5 guides in TypeScriptSame category as this article, sorted across the codebase.
TypeScript architecture: layered patterns for high-concurrency edge apps
The edge-delivery view of TypeScript's layering and data flow.
TypeScript best practices: engineering conventions for production
Field-tested TypeScript practices from production, avoiding the common anti-patterns.
TypeScript deployment guide: zero-ops edge publishing with Cloudflare Pages
Git-driven TypeScript deployment in practice: commit to build, atomic publish to every edge node.
TypeScript performance tuning: push first paint and edge response to the limit
Around TypeScript's real bottlenecks, an actionable LCP / INP / CLS checklist.
Share & save
What readers are asking
Questions that keep coming back in reader feedback, already answered.
- 01
TypeScript reports a circular dependency — how do I locate it?
With verbatimModuleSyntax on, type imports must be written as import type, otherwise they are treated as runtime dependencies and form a cycle. Tighten your module boundaries first, then raise strict.
See the full guide → - 02
Why is my Astro component's interactivity not working?
Components ship as zero-JS HTML by default, so an interactive one needs a client:* directive (client:load, client:visible, …). Without it the script is never bundled into the page.
See the full guide → - 03
Why is my custom Tailwind v4 brand colour not applied?
Colours must be declared in @theme (for example --color-brand). A missing @tailwindcss/vite plugin, or a leftover v3 config, makes bg-brand silently render nothing.
See the full guide →