@webassemblyjs/dce

> Eliminate unused functions in your WASM binary.

Features

- Removes the export instruction
- Replaces the func with an empty one (to preserve the index)

Example

``diff
(module
- (func $func_1 (param i32) (param i32) (result i32)
- (get_local 0)
- (get_local 1)
- (i32.add)
- )
- (export "add" (func $func_1))
+ (func)
)
`

FAQ

$3

First you can see the JavaScript API is specified here https://github.com/WebAssembly/binaryen/wiki/binaryen.js-API.

I encounter some issues (like removing the func wasn't working) and added an additional parse of the WASM file.

TODO

- Support DCE for exported global, memory, table`.
- Remove elements only used by this function (other imports, data, etc).
- Add CLI for node projects or libs