After switching from polymer 1 to 2 lib, iron grid was not working anymore. Console said that Polymer was not loaded which was wrong. I found a similar issue with paper-input: https://github.com/PolymerElements/paper-input/issues/561
After changing the import URLs, iron-grid works again with polymer 2.
Also applied corresponding changes to the demo/page. Demo page worked well using the polymer serve command.
After switching from polymer 1 to 2 lib, iron grid was not working anymore. Console said that Polymer was not loaded which was wrong. I found a similar issue with paper-input: https://github.com/PolymerElements/paper-input/issues/561 After changing the import URLs, iron-grid works again with polymer 2. Also applied corresponding changes to the demo/page. Demo page worked well using the polymer serve command.