build.js

const esbuild = require("esbuild");

const builds = [
    {
        entryPoints: ["src/ghost.js"],
        outfile: "dist/js/ghost.js",
    },
    {
        entryPoints: ["src/content.js"],
        outfile: "dist/js/content.js",
    },
    {
        entryPoints: ["src/background.js"],
        outfile: "dist/background.js",
    },
    {
        entryPoints: ["src/messenger_patch.js"],
        outfile: "dist/js/messenger_patch.js",
    },
];

Promise.all(
    builds.map((options) =>
        esbuild.build({
            ...options,
            bundle: true,
            minify: false,
            format: "iife",
            target: ["chrome89"],
            logLevel: "info",
        }),
    ),
).catch(() => process.exit(1));