My Website's Scrollable Divs Work Everywhere Except Mobile Safari - html

Question

I'm working on a website, http://strange.business which is designed to load 5 random stories in 5 scrollable viewing divs. Note: There are only 2 stories right now.
There didn't appear to be any problem with that aspect of the page design, the divs would scroll without issue in Chrome, IE, Edge, etc. But I tried it on my gf's iPad Mini yesterday and the divs are locked for some reason. The stories do load, but they won't scroll.
The basic setup for those divs is thus:
#display1 {
background-color: white;
height: 350px;
overflow: auto;
}
#display1Inner {
width: 100%;
height: 100%;
overflow: visible;
}
<div name="display1" id="display1" title="Display1">
<span id="display1JavaWarning">You may need to enable
Javascript</span>
<object type="text/html" id="display1Inner"></object>
</div>
When the page loads, it executes a javascript function that picks a random preview htm file, and then populates the display1Inner object with that data. I'm aware that my coding could often be tighter, but it does generally work. Except on mobile Safari apparently.
I've tried a bunch of CSS variations after researching similar problems, but nothing seems to do the trick. That "overflow: visible;" bit was one of my latest attempts, but it wasn't present when I first noticed the problem. I don't know anybody with an iPhone (oddly enough) so I'm not sure if later versions of Safari still bug out on this, but the iPad I tested this on isn't that old. I should be able to make this work. Any thoughts?
PS. The page is still is a work in progress, sorry if you have a hard time navigating it.
ETA: Alright so I converted the page to use iframes inside nested divs, and now it works across platforms. So that much is solved. Yay!
Now though, I'm fiddling around trying to get rid of the double-scrollbars that appear when the page is viewed in desktop browsers. As I understand this workaround, IOS Safari totally disregards iframe height settings and displays them at full length. Hence the need for the iframe-wrapper div to keep that in check. And hence the extra scrollbar when I look at it in a "normal" browser window. If I disable scrolling on the iframe-wrapper div then it eliminates the double scrollbar, but also breaks scrolling in Safari.
You can view the most current incarnation at http://strange.business/test.htm. I'm open to suggestions.
ETA: Success! After setting the iframe heights to 99% and taking out the borders, they look just about like they did before, with no extra scrollbars. And scrolling works across platorms now. One less problem in the my life. Thanks for the help!

Answer 1

Have you tried the following CSS for your div:
-webkit-overflow-scrolling: touch;
overflow-y: scroll;
I came across that solution in this codepen:
https://codepen.io/kristiegiles/pen/WveNaX?editors=110
It is set up to scroll an iframe, but I tried it with some plain html in place of the iframe and it worked on my iPhone.
The html is basically a div wrapped around your content:
<h1>scrolling on iOS</h1>
<div class="content">
<div class="iframe-wrapper">
// Your content here
</div>
</div>
With -webkit-overflow-scrolling: touch; and overflow-y: scroll; added to the class applied to the div:
html,body{
height:100%;
}
.content{
width:100%;
height:100%;
overflow:hidden;
position:relative;
}
.iframe-wrapper{
position: absolute;
right: 0;
bottom: 0;
left: 0;
top: 0;
-webkit-overflow-scrolling: touch;
overflow-y: scroll;
}
Hope that helps.