Publishing plugins

If you prefer reading codes, you can refer to the repository for official plugins .

Register on plugins.swc.rs

After publishing your plugin package, add it to the plugin crawler index so it appears on plugins.swc.rs .

See Registering plugins for the step-by-step guide.

Creating a npm package

Building a plugin as a wasm

You can run your plugin as a wasm file by running

cargo build-wasi --release // build wasm32-wasi target binary
cargo build-wasm32 --release // build wasm32-unknown-unknown target binary

It will create target/wasm32-wasi/release/your_plugin_name.wasm or target/wasm32-unknown-unknown/release/your_plugin_name.wasm, depending on your config.

Creating a npm package for plugin

Add the following to your package.json:

{
    "main": "your_plugin_name.wasm",
    "scripts": {
        "prepack": "cargo prepublish --release && cp target/wasm32-wasi/release/your_plugin_name.wasm ."
    },
}

Advanced: Improving your plugin

Adjusting configuration for smaller binary

You can reduce the size of the plugin by configuring cargo.

In your Cargo.toml file, you can add the following lines.

[profile.release]
# This removes more dead code
codegen-units = 1
lto = true
# Optimize for size
opt-level = "s"
# Optimize for performance, this is default so you don't need to specify it
# opt-level = "z"
 
# Strip debug symbols
strip = "symbols"

Removing log for release mode

If logging of your crate is too much, you can remove it by enabling release_max_level_* of tracing, like

tracing = { version="0.1", features = ["release_max_level_info"] }