From 07365ca12e33c2371cc68b6fae3336dd188a6374 Mon Sep 17 00:00:00 2001
From: austaras <austaras@outlook.com>
Date: Wed, 11 Mar 2020 03:00:51 +0800
Subject: [PATCH] fix: check for entryPoint to have entryModule

fixes #56
---
 examples/typescript-plain/webpack.config.js | 4 ++++
 src/babel-target.ts                         | 3 +++
 src/babel.multi.target.html.updater.ts      | 4 ++++
 3 files changed, 11 insertions(+)

diff --git a/examples/typescript-plain/webpack.config.js b/examples/typescript-plain/webpack.config.js
index 0b96cdd..3ee500c 100644
--- a/examples/typescript-plain/webpack.config.js
+++ b/examples/typescript-plain/webpack.config.js
@@ -15,6 +15,10 @@ module.exports = {
     'main': './src/entry.ts',
   },
 
+  optimization: {
+    runtimeChunk: 'single',
+  },
+
   module: {
     rules: [
       {
diff --git a/src/babel-target.ts b/src/babel-target.ts
index d448bde..6fbd160 100644
--- a/src/babel-target.ts
+++ b/src/babel-target.ts
@@ -162,6 +162,9 @@ export class BabelTarget implements BabelTargetInfo {
   }
 
   public static getTargetFromEntrypoint(entrypoint: Entrypoint): BabelTarget {
+    if (!entrypoint.runtimeChunk.hasEntryModule()) {
+      return undefined
+    }
     return BabelTarget.getTargetFromModule(entrypoint.runtimeChunk.entryModule)
   }
 
diff --git a/src/babel.multi.target.html.updater.ts b/src/babel.multi.target.html.updater.ts
index b8ddf74..7d149eb 100644
--- a/src/babel.multi.target.html.updater.ts
+++ b/src/babel.multi.target.html.updater.ts
@@ -46,6 +46,10 @@ export class BabelMultiTargetHtmlUpdater implements Plugin {
         }
 
         const target = targets[0]
+        if (target === undefined) {
+          return
+        }
+
         if (target.esModule) {
           tag.attributes.type = 'module'
           return