.esbuild.esm.js

const esbuild = require("esbuild");
// tiny glob is a dependency of `esbuild-plugin-glob`.
// For this build however we need to filter out some extra files
// that are used for nodejs, but not in browsers, so we use the
// library directly instead of using `esbuild-plugin-glob` as a plugin
const glob = require("tiny-glob");
const esbuildCommon = require("./.esbuild.common");

async function main() {
  const results = await glob("src/**/!(*.test.js|test-constants.js|!(*.js))");
  // we remove node specific files here, with the assumption that
  // the common use case is bundling into browser based web apps
  const justBrowserCompatibleFiles = results.filter(
    (filepath) => !filepath.endsWith("node.js")
  );

  esbuild.build({
    ...esbuildCommon,
    entryPoints: justBrowserCompatibleFiles,
    bundle: false,
    minify: false,
    sourcemap: false,
    target: ["chrome58", "firefox57", "safari11", "edge18", "esnext"],
    outdir: "dist/esm",
    outExtension: { ".js": ".js" },
    format: "esm",
    supported: {
      destructuring: true,
    },
  });
}
main();