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97 lines
3 KiB
Markdown
97 lines
3 KiB
Markdown
# deno
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| **Linux & Mac** | **Windows** |
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| :------------------------: | :------------------------: |
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| [![][tci badge]][tci link] | [![][avy badge]][avy link] |
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## A new way to JavaScript.
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- Supports TypeScript out of the box. Uses a recent version of V8. That is, it's
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very modern JavaScript.
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- No `package.json`. No npm. Not explicitly compatible with Node.
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- Imports reference source code URLs only.
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```typescript
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import { test } from "https://unpkg.com/deno_testing@0.0.5/testing.ts";
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import { log } from "./util.ts";
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```
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Remote code is fetched and cached on first execution, and never updated until
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the code is run with the `--reload` flag. (So, this will still work on an
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airplane. See `~/.deno/src` for details on the cache.)
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- File system and network access can be controlled in order to run sandboxed
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code. Defaults to read-only file system access and no network access. Access
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between V8 (unprivileged) and Rust (privileged) is only done via serialized
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messages defined in this
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[flatbuffer](https://github.com/denoland/deno/blob/master/src/msg.fbs). This
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makes it easy to audit. To enable write access explicitly use `--allow-write`
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and `--allow-net` for network access.
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- Single executable:
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```
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> ls -lh target/release/deno
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-rwxr-xr-x 1 rld staff 48M Aug 2 13:24 target/release/deno
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> otool -L target/release/deno
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target/release/deno:
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/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.50.4)
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/usr/lib/libresolv.9.dylib (compatibility version 1.0.0, current version 1.0.0)
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/System/Library/Frameworks/Security.framework/Versions/A/Security (compatibility version 1.0.0, current version 58286.51.6)
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/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 400.9.0)
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>
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```
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- Always dies on uncaught errors.
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- [Aims to support top-level `await`.](https://github.com/denoland/deno/issues/471)
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- Aims to be browser compatible.
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See the website for more info [deno.land](https://deno.land).
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## Install
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With Shell:
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```
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curl -L https://deno.land/x/install/install.sh | bash
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```
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With PowerShell:
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```powershell
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iex (iwr https://deno.land/x/install/install.ps1)
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```
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_Note: Depending on your security settings, you may have to run
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`Set-ExecutionPolicy RemoteSigned -Scope CurrentUser` first to allow downloaded
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scripts to be executed._
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With [Scoop](https://scoop.sh/):
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```
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scoop install deno
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```
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Try it:
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```
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> deno https://deno.land/thumb.ts
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```
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See [deno_install](https://github.com/denoland/deno_install) for more
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installation methods..
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## Build locally (advanced users only)
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For instructions to build this project locally, please see
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[the docs](https://github.com/denoland/deno/blob/master/Docs.md#build-instructions-for-advanced-users-only).
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<!-- prettier-ignore -->
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[avy badge]: https://ci.appveyor.com/api/projects/status/yel7wtcqwoy0to8x?branch=master&svg=true
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[avy link]: https://ci.appveyor.com/project/deno/deno
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[tci badge]: https://travis-ci.com/denoland/deno.svg?branch=master
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[tci link]: https://travis-ci.com/denoland/deno
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