1 files changed, 39 insertions, 0 deletions
diff --git a/packages/browser/rollup.config.js b/packages/browser/rollup.config.js
index 15a0b88..0c5ab8d 100644
--- a/packages/browser/rollup.config.js
+++ b/packages/browser/rollup.config.js
@@ -3,6 +3,33 @@ import nodeResolve from '@rollup/plugin-node-resolve';
 import { terser } from 'rollup-plugin-terser';
 import versionInjector from 'rollup-plugin-version-injector';
 
+/**
+ * Rollup plugin to clean `tslib` comment in `UMD` bundle targeting `ES5`
+ */
+const cleanTslibCommentInUMDBundleTargetingES5 = () => {
+  return {
+    name: 'cleanTslibCommentInUMDBundleTargetingES5',
+    renderChunk: async code => {
+      const comment = `
+/*! *****************************************************************************
+    Copyright (c) Microsoft Corporation.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose with or without fee is hereby granted.
+
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+    PERFORMANCE OF THIS SOFTWARE.
+    ***************************************************************************** */`;
+      return code.indexOf(comment) > -1 ? code.replace(comment, '') : null;
+    },
+  };
+};
+
 const swanVersionInjector = versionInjector({
   injectInComments: {
     fileRegexp: /\.(js)$/,
@@ -15,6 +42,7 @@ const swanVersionInjector = versionInjector({
 /**
  * Rollup configuration to generate the following:
  * - ES2018 bundle
+ * - ES5 bundle
  * - Type declarations
  */
 export default [
@@ -37,4 +65,15 @@ export default [
     ],
     plugins: [typescript({ tsconfig: './tsconfig.json' }), nodeResolve(), swanVersionInjector],
   },
+  {
+    input: 'src/index.ts',
+    output: {
+      dir: 'dist',
+      format: 'umd',
+      name: 'SimpleWebAuthnBrowser',
+      entryFileNames: 'bundle/[name].es5.umd.min.js',
+      plugins: [terser(), cleanTslibCommentInUMDBundleTargetingES5()],
+    },
+    plugins: [typescript({ tsconfig: './tsconfig.es5.json' }), nodeResolve(), swanVersionInjector],
+  },
 ];