package.json

{
    "name": "rust",
    "version": "0.1.0",
    "description": "frontend wasm in rust",
    "license": "MIT",
    "private": true,
    "scripts": {
        "todo_watch": "yarn run todo_clean && rollup -c rollup.dev.js --watch",
        "todo_clean": "rimraf ./devhtml/js",
    },
    "dependencies": {
        "@wasm-tool/rollup-plugin-rust": "^1.0.5",
        "wasm-pack": "^0.9.1"
    },
    "devDependencies": {
        "npm-run-all": "^4.1.5",
        "rimraf": "^3.0.2",
        "rollup": "^2.29.0",
        "rollup-plugin-livereload": "^2.0.0",
        "rollup-plugin-serve": "^1.0.4",
        "rollup-watch": "^4.3.1"
    }
}

rollup.dev.js

import rust from "@wasm-tool/rollup-plugin-rust";
import livereload from "rollup-plugin-livereload";
import serve from "rollup-plugin-serve";

export default {
    input: {
        index: 'Cargo.toml'
    },
    output: {
        dir: "devhtml/js",
        format: "iife",
        sourcemap: true
    },
    plugins: [
        rust({
            serverPath: "/js/",
            debug: true,
            verbose: true,
            watchPatterns: ["src/**"],
            cargoArgs: ["--features", "develop"],
            watch: true,
        }),

        serve({
            contentBase: 'devhtml',
            open: true,
            verbose: true,
            historyApiFallback: true,
        }),

        livereload({
            watch: 'devhtml',
            verbose: true

        })
    ],
    watch: {
        clearScreen: false
    }
};