---
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}}`
