133 breaking releases

Uses new Rust 2021

new 0.162.0 Dec 1, 2022
0.161.0 Nov 24, 2022
0.160.0 Nov 16, 2022
0.145.0 Jul 28, 2022
0.0.1 Sep 13, 2019

#470 in Web programming

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18,436 downloads per month
Used in 75 crates (63 directly)

MIT license

4.5MB
16K SLoC

Rust 14K SLoC // 0.1% comments JavaScript 1K SLoC // 0.1% comments TypeScript 1K SLoC // 0.1% comments

Deno Core Crate

crates docs

The main dependency of this crate is rusty_v8, which provides the V8-Rust bindings.

This Rust crate contains the essential V8 bindings for Deno's command-line interface (Deno CLI). The main abstraction here is the JsRuntime which provides a way to execute JavaScript.

The JsRuntime implements an event loop abstraction for the executed code that keeps track of all pending tasks (async ops, dynamic module loads). It is user's responsibility to drive that loop by using JsRuntime::run_event_loop method - it must be executed in the context of Rust's future executor (eg. tokio, smol).

Rust functions can be registered in JavaScript using deno_core::Extension. Use the Deno.core.ops.op_name() and Deno.core.opAsync("op_name", ...) functions to trigger the op function callback. A conventional way to write ops is using the deno_ops crate.

Documentation for this crate is thin at the moment. Please see hello_world.rs and http_bench_json_ops.rs as examples of usage.

TypeScript support and lots of other functionality are not available at this layer. See the CLI for that.

Dependencies

~74MB
~1.5M SLoC