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Developer tools · #denojs
Deno blocks file, network, and environment access by default. Grant only the permissions your script needs.
Deno’s permission system lets you grant fine‑grained access to files, network, env, and more. Learn how to declare flags, request permissions at runtime, and verify them with real examples – plus common pitfalls to avoid.
A practical guide to configuring Deno's permission flags for least-privilege execution: mapping requirements, applying granular --allow-* and --deny-* flags, handling dynamic requests, and verifying the effective sandbox with static analysis and runtime smoke tests.
Deno runs TypeScript directly, but type stripping is not type checking. Learn when to skip tsc and when to keep deno check.
Deno runs .ts files directly by using its internal Rust‑based SWC compiler to transpile and type‑check on demand, eliminating the need for separate tsc, Babel, or webpack steps.
Learn how Deno’s zero‑default permission model works, how to use flags and the Permissions API for gradual privilege granting, and how to lock down CI jobs without sacrificing safety.
Decide between Deno's native TypeScript runtime execution and 'deno compile' for standalone binaries. Compare startup latency, artifact size, and portability with concrete implementation steps.
Discover how Deno's native testing runner eliminates the need for complex TypeScript configurations and external dependencies like Jest or Vitest.
Learn how Deno eliminates the TypeScript build step by integrating transpilation into the runtime, allowing for direct execution of .ts files with a security-first permission model.
typescript