htmlcssiossafari

White space at page bottom after device rotation in iOS Safari

I have a website with a meta tag

<meta name="viewport" content="width=device-width, initial-scale=1.0">

and height:100%; on html and body tags.

When I access this site from Safari (iOS 13.5.1) and do the following:

then a white space appears on the bottom of the screen. This space is not a part of the page html code. It is outside of the html tag.

enter image description here

Minimum reproducible example: https://jsbin.com/cojabiquza

This seems to be related to the Safari behaviour when it hides the address panel and the bottom panel when the device goes to the landscape mode. And when it goes back to the portrait mode the panels are shown again but the browser "forgets" to recalculate something and shows an extra space on the bottom of the page.

Deleting <meta name="viewport"... fixes it. But I can't get rid of it because I have a responsive website. In other browsers it works well.

Please share your experience if you know how to fix it.

Solution

  • @Jax-p answer is valid for the bug I described but it causes another problem. When you use 100vh the content starts to be hidden behind the address bar:

    enter image description here

    So in my real life app I ended up with a bunch of hacks:

    document.addEventListener('orientationchange', () => {
  document.documentElement.style.height = `initial`;
  setTimeout(() => {
    document.documentElement.style.height = `100%`;
      setTimeout(() => {
        // this line prevents the content
        // from hiding behind the address bar
        window.scrollTo(0, 1);
      }, 500);
  }, 500);
});

    This hack more or less fixes the problem in iOS Safari 12 and 13