DEV Community

TypeScript

Optional static type-checking for JavaScript.

Posts

👋 Sign in for the ability to sort posts by relevant, latest, or top.
Claude Code Custom System Prompts in 2026: Overriding Defaults, Appending Instructions, and What You Cannot Change

Claude Code Custom System Prompts in 2026: Overriding Defaults, Appending Instructions, and What You Cannot Change

Comments
13 min read
Stop your AI agent deleting things: human approval for destructive MCP tools

Stop your AI agent deleting things: human approval for destructive MCP tools

6
Comments 44
3 min read
Compiling Customer Segments to SQL: OR Groups, Tenant Safety and Membership That Stays Current

Compiling Customer Segments to SQL: OR Groups, Tenant Safety and Membership That Stays Current

1
Comments
9 min read
Vue provide/inject: Why You Should Never Skip readonly()

Vue provide/inject: Why You Should Never Skip readonly()

Comments
10 min read
4,300 tests, written by an AI: how they were planned, run and enforced

4,300 tests, written by an AI: how they were planned, run and enforced

Comments
3 min read
Designing a Public API for a WhatsApp Platform: Tokens, Scopes, Rate Limits and Idempotent Sends

Designing a Public API for a WhatsApp Platform: Tokens, Scopes, Rate Limits and Idempotent Sends

1
Comments
10 min read
Turning a photo into a cross stitch chart: picking threads with CIEDE2000

Turning a photo into a cross stitch chart: picking threads with CIEDE2000

Comments
3 min read
Build a BPE Tokenizer in 80 Lines of TypeScript and Watch JSON Eat Your Tokens

Build a BPE Tokenizer in 80 Lines of TypeScript and Watch JSON Eat Your Tokens

2
Comments 3
9 min read
Routing WhatsApp Quick-Reply Buttons to Actions: Payloads, Retries, Edits and Double Taps

Routing WhatsApp Quick-Reply Buttons to Actions: Payloads, Retries, Edits and Double Taps

1
Comments
8 min read
Building Sub-Millisecond Ingestion Middleware for ServiceTitan and Jobber: Part Four - Bare-Metal V8 Edge Runtimes and In-RAM Idempotency

Building Sub-Millisecond Ingestion Middleware for ServiceTitan and Jobber: Part Four - Bare-Metal V8 Edge Runtimes and In-RAM Idempotency

1
Comments 1
4 min read
TanStack AI vs Vercel AI SDK: The One I Would Ship

TanStack AI vs Vercel AI SDK: The One I Would Ship

Comments
15 min read
Let Course Progress Follow Evidence, Not Session Endings

Let Course Progress Follow Evidence, Not Session Endings

Comments
2 min read
October 2026 for React and AI Devs: Next.js 16.4, TypeScript 7.1 Beta, a Big TanStack Month, Convex 1.47 to 1.49

October 2026 for React and AI Devs: Next.js 16.4, TypeScript 7.1 Beta, a Big TanStack Month, Convex 1.47 to 1.49

Comments
7 min read
State Explorer: A Zoomable Timeline for React

State Explorer: A Zoomable Timeline for React

Comments
4 min read
Line-anchored output and the filter chips

Line-anchored output and the filter chips

Comments
2 min read
👋 Sign in for the ability to sort posts by relevant, latest, or top.