Ionic - ReferenceError: Can't find variable: webpackJsonp


after last update of my Ionic app libraries I have seen blank white page in emulator and error in console: ReferenceError: Can’t find variable: webpackJsonp

I had no idea what could be causing this. After pointless googling I tried to create a new Ionic project. Apparently from version 2.0 file /src/index.html have been changed! Body now should look like this - new is file build/vendor.js


  <!-- Ionic's root component and where the app will load -->

  <!-- The polyfills js is generated during the build process -->
  <script src="build/polyfills.js"></script>

  <!-- The vendor js is generated during the build process
       It contains all of the dependencies in node_modules -->
  <script src="build/vendor.js"></script>

  <!-- The main bundle js is generated during the build process -->
  <script src="build/main.js"></script>


This solved my problem. It would be nice to have some warning if build/vendor.js is not included …

PS: currently Ionic is not working with typescript version 2.4.1 - so don`t waste time with updating … It have some new code checks which will find errors in Ionic core libraries and build fails.


The need for vendor.js is in the Ionic changelog for framework 3.5. And yeah, only use the exact version of Typescript recommended. In general, only use ^ in package.json for libraries that Ionic does not need as a peer.


Thanks for the tip. Additionally, for those upgrading to the very latest release running ng 5 from an older version, you may have to add the BrowserModule from @angular/platform-browser in your app.module.ts:

import { BrowserModule } from '@angular/platform-browser';

// Above your Ionic import in NgModule:
  imports: [