build: esnext esbuild

Author: ajaishankar

.vscode/settings.json

@@ -1,7 +1,7 @@
 {
     "editor.formatOnSave": false,
     "editor.codeActionsOnSave": {
-        "source.fixAll.eslint": true
+        "source.fixAll.eslint": "explicit"
     },
     "typescript.tsdk": "node_modules/typescript/lib",
     "files.exclude": {
@@ -13,7 +13,6 @@
         "**/lib": true,
         "**/node_modules": true,
         "**/coverage": true,
-        "**/dist": true,
         "**/tsconfig.tsbuildinfo": true,
         "**/yarn-error.log": true
     }

build.js

@@ -0,0 +1,29 @@
+// https://janessagarrow.com/blog/typescript-and-esbuild/
+
+const { build } = require("esbuild");
+const { dependencies, peerDependencies } = require('./package.json');
+const { Generator } = require('npm-dts');
+
+new Generator({
+  entry: 'index.ts',
+  output: 'dist/index.d.ts',
+}).generate();
+
+const sharedConfig = {
+  entryPoints: ["src/index.ts"],
+  bundle: true,
+  external: Object.keys(dependencies ?? {}).concat(Object.keys(peerDependencies ?? {})),
+};
+
+build({
+  ...sharedConfig,
+  platform: 'node', // for CJS
+  outfile: "dist/index.cjs",
+});
+
+build({
+  ...sharedConfig,
+  outfile: "dist/index.js",
+  platform: 'neutral', // for ESM
+  format: "esm",
+});