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A modern runtime for JavaScript and TypeScript. https://deno.com/
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Nathan Whitaker aac7a8cb7c
perf(lsp): Batch "$projectChanged" notification in with the next JS request (#23451)
The actual handling of `$projectChanged` is quick, but JS requests are
not. The cleared caches only get repopulated on the next actual request,
so just batch the change notification in with the next actual request.

No significant difference in benchmarks on my machine, but this speeds
up `did_change` handling and reduces our total number of JS requests (in
addition to coalescing multiple JS change notifs into one).
2024-04-22 08:03:16 -07:00
.cargo feat: bring back WebGPU (#20812) 2023-12-09 01:19:16 +01:00
.devcontainer fix(devcontainer): moved settings to customizations/vscode (#21512) 2023-12-19 13:29:39 +01:00
.github fix: allow WPT to successfully exit using --exit-zero (#23418) 2024-04-17 10:40:47 +00:00
bench_util chore: forward v1.42.4 commit to main (#23394) 2024-04-16 02:41:59 +00:00
cli perf(lsp): Batch "$projectChanged" notification in with the next JS request (#23451) 2024-04-22 08:03:16 -07:00
ext fix(ext/node): define http.maxHeaderSize (#23479) 2024-04-21 07:31:23 +05:30
runtime refactor(ext/http): extract 02_websocket.ts from 01_http.js (#23460) 2024-04-19 20:02:39 -06:00
tests perf(lsp): Batch "$projectChanged" notification in with the next JS request (#23451) 2024-04-22 08:03:16 -07:00
tools chore: add lint script to ensure no new itest! tests (#23475) 2024-04-20 21:58:14 +00:00
.dlint.json chore: update dlint to v0.37.0 for GitHub Actions (#17295) 2023-01-16 17:17:18 +01:00
.dprint.json fix(fmt): error for more unterminated nodes (#23449) 2024-04-18 20:37:16 -04:00
.editorconfig chore(tests): Remove vestiges of cli/tests folder (#22712) 2024-03-05 13:49:21 -07:00
.gitattributes chore: move cli/tests/ -> tests/ (#22369) 2024-02-10 20:22:13 +00:00
.gitignore chore: move tools/wpt to tests/wpt/runner (#22545) 2024-03-05 00:41:16 +00:00
.gitmodules chore: make remaining submodules shallow (#23441) 2024-04-18 19:45:09 +00:00
.rustfmt.toml chore: update copyright year to 2023 (#17247) 2023-01-02 21:00:42 +00:00
Cargo.lock chore: update deno_config to 0.16.1 (#23480) 2024-04-21 03:04:30 +02:00
Cargo.toml chore(deps): bump rustls from 0.21.10 to 0.21.11 (#23464) 2024-04-19 18:08:31 -06:00
LICENSE.md chore: update LICENSE.md to 2024 (#21833) 2024-01-06 19:14:38 -05:00
README.md chore: update references to deno_std to use JSR (#23239) 2024-04-10 17:26:35 -04:00
Releases.md chore: forward v1.42.4 commit to main (#23394) 2024-04-16 02:41:59 +00:00
rust-toolchain.toml chore: update to Rust 1.77.2 (#23262) 2024-04-10 22:08:23 +00:00

Deno

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the deno mascot dinosaur standing in the rain

Deno (/ˈdiːnoʊ/, pronounced dee-no) is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults and a great developer experience. It's built on V8, Rust, and Tokio.

Learn more about the Deno runtime in the documentation.

Installation

Install the Deno runtime on your system using one of the commands below. Note that there are a number of ways to install Deno - a comprehensive list of installation options can be found here.

Shell (Mac, Linux):

curl -fsSL https://deno.land/install.sh | sh

PowerShell (Windows):

irm https://deno.land/install.ps1 | iex

Homebrew (Mac):

brew install deno

Chocolatey (Windows):

choco install deno

Build and install from source

Complete instructions for building Deno from source can be found in the manual here.

Your first Deno program

Deno can be used for many different applications, but is most commonly used to build web servers. Create a file called server.ts and include the following TypeScript code:

Deno.serve((_req: Request) => {
  return new Response("Hello, world!");
});

Run your server with the following command:

deno run --allow-net server.ts

This should start a local web server on http://localhost:8000.

Learn more about writing and running Deno programs in the docs.

Additional resources

Contributing

We appreciate your help! To contribute, please read our contributing instructions.