mirror of
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A modern runtime for JavaScript and TypeScript.
https://deno.com/
adf41edda1
Related issue: https://github.com/denoland/deno/issues/19358. This is a regression that seems to have been introduced in https://github.com/denoland/deno/pull/18905. It looks to have been a performance optimization. The issue is probably easiest described with some code: ```ts const target = new EventTarget(); const event = new Event("foo"); target.addEventListener("foo", () => { console.log('base'); target.addEventListener("foo", () => { console.log('nested'); }); }); target.dispatchEvent(event); ``` Essentially, the second event listener is being attached while the `foo` event is still being dispatched. It should then not fire that second event listener, but Deno currently does. |
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| runtime | ||
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| .rustfmt.toml | ||
| Cargo.lock | ||
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| LICENSE.md | ||
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Deno
Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.
Features
- Secure by default. No file, network, or environment access, unless explicitly enabled.
- Provides
web platform functionality and APIs,
e.g. using ES modules, web workers, and
fetch(). - Supports TypeScript out of the box.
- Ships only a single executable file.
- Built-in tooling including
deno test,deno fmt,deno bench, and more. - Includes a set of reviewed standard modules guaranteed to work with Deno.
- Supports npm.
Install
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
Scoop (Windows):
scoop install deno
Build and install from source using Cargo:
cargo install deno --locked
See deno_install and releases for other options.
Getting Started
deno run https://deno.land/std/examples/welcome.ts
Or setup a simple HTTP server:
import { serve } from "https://deno.land/std@0.182.0/http/server.ts";
serve((_req) => new Response("Hello, World!"));
Additional Resources
- The Deno Manual is a great starting point for additional examples, setting up your environment, using npm, and more.
- Runtime API reference documents all APIs built into Deno CLI.
- Deno Standard Modules do not have external dependencies and are reviewed by the Deno core team.
- deno.land/x is the registry for third party modules.
- Blog is where the Deno team shares important product updates and "how to"s, about solving technical problems.
Contributing
We appreciate your help!
To contribute, please read our contributing instructions.