It works in codepen but here’s the link: In the cap you should see that it is the exact same code. I’ve scrolled just a bit in the emulator so you can see that it’s the viewport height before you see the text below. I’ve also tried in Chrome using the inspector and got the same results. The onsen links are the from the library which I just grabbed last week and I’ve not altered anything there. I also tried with the CDN and got the same results.