esbuild.js

const esbuild = require('esbuild')
const path = require("path")
const {compressionBrowserPlugin, wasmPlugin} = require("./esbuild-plugins");
// esbuild has TypeScript support by default
const baseConfig = {
    bundle: true,
    entryPoints: ['parquet.ts'],
    define: {
        "process.env.NODE_DEBUG": false,
        "process.env.NODE_ENV": "\"production\"",
        global: "window"
    },
    inject: ['./esbuild-shims.js'],
    minify: true,
    platform: 'browser',  // default
    plugins: [compressionBrowserPlugin, wasmPlugin],
    target: "es2020"  // default
};
const targets = [
    {
        ...baseConfig,
        globalName: 'parquetjs',
        outdir: path.resolve(__dirname, "dist","browser"),
    },
    {
        ...baseConfig,
        format: "esm",
        outfile: path.resolve(__dirname, "dist","browser","parquet.esm.js"),
    },
    {
        ...baseConfig,
        format: "cjs",
        outfile: path.resolve(__dirname, "dist","browser","parquet.cjs.js"),
    }
]
Promise.all(targets.map(esbuild.build))
    .then(results => {
        if (results.reduce((m,r)=>m && !r.warnings.length, true)) {
            console.log("built with no errors or warnings")
        }
    })
    .catch(e => {
        console.error("Finished with errors: ", e.toString());
    });