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A modern runtime for JavaScript and TypeScript.
https://deno.com/
d24c6ea27f
Since we are snapshotting extension source at build time, there's no need to define list of sources for the extension at runtime. This commit changes "deno_node" extension by removing "init_polyfill" function in favor of "init_polyfill_ops_and_esm()" and "init_polyfill_ops()". The former is used during snapshot and when "deno_runtime" is compiled with "dont_create_runtime_snapshot" cargo feature flag. The latter is used when running a worker from an existing snapshot. This is a start of a bigger refactor to all extensions - thanks to this change, we don't have to iterate over all defined source files for extension at runtime, and because of that we don't have to create a filepath for each of the source files. It's not a big deal, but we are iterating over 300 files on each start, and concatenating 3 strings before creating a "PathBuf" for ~200 of them. This is already visible on the startup flamegraphs and should be avoided. |
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.cargo | ||
.devcontainer | ||
.github | ||
bench_util | ||
cli | ||
core | ||
ext | ||
lockfile | ||
ops | ||
runtime | ||
serde_v8 | ||
test_ffi | ||
test_napi | ||
test_util | ||
third_party@ff2ffb4fd9 | ||
tools | ||
.dlint.json | ||
.dprint.json | ||
.editorconfig | ||
.gitattributes | ||
.gitignore | ||
.gitmodules | ||
.rustfmt.toml | ||
Cargo.lock | ||
Cargo.toml | ||
LICENSE.md | ||
README.md | ||
Releases.md | ||
rust-toolchain.toml |
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.
- Supports TypeScript out of the box.
- Ships only a single executable file.
- Built-in utilities.
- Set of reviewed standard modules that are guaranteed to work with Deno.
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
Try running a simple program:
deno run https://deno.land/std/examples/welcome.ts
Or a more complex one:
const listener = Deno.listen({ port: 8000 });
console.log("http://localhost:8000/");
for await (const conn of listener) {
serve(conn);
}
async function serve(conn: Deno.Conn) {
for await (const { respondWith } of Deno.serveHttp(conn)) {
respondWith(new Response("Hello world"));
}
}
You can find a deeper introduction, examples, and environment setup guides in the manual.
The complete API reference is available at the runtime documentation.
Contributing
We appreciate your help!
To contribute, please read our contributing instructions.