Some fun little scripts that list the sizes of minified and gzipped javascript files.

rollup.js

import {rollup} from "npm:rollup";
import terser from "npm:@rollup/plugin-terser";

const bundle = await rollup({
    input: "./src/main.js",
});

await bundle.write({
    file: "./dist/out.js",
    format: "cjs",
});
await bundle.write({
    file: "./dist/out.min.js",
    format: "cjs",
    plugins: [terser()],
});

sizes.sh

#!/bin/sh

set -e

deno run -A rollup.js

js="out.js"
min="out.min.js"

echo "Compiled size: $(wc ./dist/$js -c | cut -d' ' -f1) bytes  ($js)"
echo "Minified size: $(wc ./dist/$min -c | cut -d' ' -f1) bytes  ($min)"
echo "Gzipped size: $(gzip ./dist/$min -c | wc -c | cut -d' ' -f1) bytes"