mirror of
https://github.com/denoland/deno.git
synced 2024-11-29 16:30:56 -05:00
31 lines
1.5 KiB
Markdown
31 lines
1.5 KiB
Markdown
# Deno Core Crate
|
|
|
|
[](https://crates.io/crates/deno_core)
|
|
[](https://docs.rs/deno_core)
|
|
|
|
The main dependency of this crate is
|
|
[rusty_v8](https://github.com/denoland/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`](https://github.com/denoland/deno/blob/main/ops) crate.
|
|
|
|
Documentation for this crate is thin at the moment. Please see
|
|
[hello_world.rs](https://github.com/denoland/deno/blob/main/core/examples/hello_world.rs)
|
|
and
|
|
[http_bench_json_ops/main.rs](https://github.com/denoland/deno/blob/main/core/examples/http_bench_json_ops/main.rs)
|
|
as examples of usage.
|
|
|
|
TypeScript support and lots of other functionality are not available at this
|
|
layer. See the [CLI](https://github.com/denoland/deno/tree/main/cli) for that.
|