Cleaned up build

.gitignore

@@ -11,3 +11,4 @@ packages/*/umd
 examples/*/lib
 examples/*/umd
 *.tsbuildinfo
+stats.html

create-rollup-config.js

@@ -0,0 +1,59 @@
+import typescript from '@rollup/plugin-typescript';
+import resolve from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import { terser } from 'rollup-plugin-terser';
+import visualizer from 'rollup-plugin-visualizer';
+import replace from 'rollup-plugin-replace';
+import compiler from '@ampproject/rollup-plugin-closure-compiler';
+
+export function createRollupConfig(globalName, pkg, external = []) {
+  return [
+    {
+      input: 'src/index.ts',
+      output: [
+        {
+          file: pkg.web,
+          name: globalName,
+          format: 'umd',
+          sourcemap: true,
+        },
+      ],
+      plugins: [
+        typescript({ target: 'es5' }),
+        replace({
+          'process.env.NODE_ENV': JSON.stringify('production'),
+        }),
+        resolve({ browser: true }), // so Rollup can find `ms`
+        commonjs({ extensions: ['.js', '.ts'] }), // the ".ts" extension is required
+        terser(),
+        compiler(),
+      ],
+      external,
+    },
+    {
+      input: 'src/index.ts',
+      output: [
+        {
+          file: pkg.main,
+          format: 'cjs',
+          sourcemap: true,
+        },
+        {
+          file: pkg.module,
+          format: 'es',
+          sourcemap: true,
+        },
+      ],
+      external: ['crypto', ...external, ...Object.keys(pkg.dependencies)],
+      plugins: [
+        typescript(),
+        replace({
+          'process.env.NODE_ENV': JSON.stringify('production'),
+        }),
+        resolve(), // so Rollup can find `ms`
+        commonjs({ extensions: ['.js', '.ts'] }), // the ".ts" extension is required
+        visualizer(),
+      ],
+    },
+  ];
+}