go-module-loader

Webpack loader that turns Go code into JS modules, but with WebAssembly in the background.

Install

Install witn npm:

npm install --save-dev go-module-loader

or with yarn:

yarn add -D go-module-loader

Note: go also have to be installed. And either have go in PATH, or have GOROOT set.

Usage (with jsbridge)

webpack.config.js

module.exports = {
    // ...
    module: {
        rules: [
            {
                test: /\.go$/,
                use: 'go-module-loader',
            },
        ],
    },
};

src/mymath.go

package main

import (
    "github.com/opkna/jsbridge"
)


func main() {
    jsbridge.ExportFunc("add", add, false)
    select {}
}

func add(args []interface{}) (interface{}, error) {
    a := args[0].(float64)
    b := args[1].(float64)

    return a + b, nil
}

src/index.js

import mymath from './mymath.go';

mymath.instantiate().then((inst) => {
    console.log(inst.add(1, 2));
});

To be able to test this loader you need to use a development server, otherwise CORS will block the fetch for the wasm file. Also the dev server need to be able to handle the application/wasm MIME type. webpack-dev-server work well on both counts.