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cheatsheet-tldr/tldr/deno
2025-12-20 00:20:53 +00:00

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---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# deno
> A secure runtime for JavaScript, TypeScript, and WebAssembly.
> Includes dependency management using `npm` or `jsr`, and tooling like bench, bundle, doc, and coverage.
> More information: <https://docs.deno.com/runtime/reference/cli/>.
- Start a REPL (interactive shell, also known as Read-Eval-Print Loop):
`deno`
- Start a new project named sample and test it:
`deno init sample && cd sample && deno test`
- Run a file securely. It will ask (if needed) to allow net, read, etc:
`deno run {{path/to/file.ts}}`
- Run a file with explicit permissions or allow all (only if you trust the source):
`deno run {{[--allow-env|--allow-net|--allow-write|--allow-all]}} {{jsr:@deno/deployctl}}`
- List and run tasks from `deno.json` or scripts from `package.json`:
`deno task`
- Install dependencies listed in `deno.json` or `package.json` (also lock files):
`deno install`
- Check types, format, and lint (fix if possible):
`deno check && deno fmt && deno lint --fix`
- Compile the script, imported dependencies, and runtime into a self contained executable:
`deno compile {{path/to/file.ts}}`