Develop Reference

Mozilla Android AddressBar Conflict with Sticky Button on Bottom

I have searched a lot and havent found any solution that works so here it is.
I have created a button that is after the content and have applied css for it to become sticky at the bottom of the page...
<button class="ocs-trigger ocs-toggle ocs-toggle-posts-toc-mobile">Περιεχόμενα</button>
button.ocs-toggle-posts-toc-mobile {
display: block;
bottom: 10px;
position: sticky;
position: -webkit-sticky;
margin: auto;
border-radius: 4px;
box-shadow: 0 0 3px 0 #d5d5d5;
background: #232f3e;
font-weight: 500;
font-size: 18px;
padding: 7px 12px;
}
It works everywhere in any browser i tested except mozilla android.
If mozilla bottom adressbar is visible the button works okay.
https://imgur.com/a/EJosALR
BUT if mozilla’s bottom address bar is hidden, the button isnt clickable.
https://imgur.com/a/A2jwzIl
When the mozilla’s bottom address bar is hidden i think the viewport height changes, and maybe because the button is now where the visible adressbar was maybe it out of the "active" viewport of mozilla... that's definetely a bug i believe cause it doesnt happen in other browsers!
Nevertheless can you take a look and see if i have anything i have missed?
I would really appreciate it cause i have looked almost everywhere i believe...
test url: https://thefinterest.kinsta.cloud/p/asjalska/

Investigations using Firefox remote debugging
TL;DR: With high probability a bug in the Firefox mobile app
So I've linked up my phone to the computer and started a remote debugging session on the page you provided.
When inspecting the button element <button class="ocs-trigger ocs-toggle ocs-toggle-posts-toc-mobile">Περιεχόμενα</button> we can see the exact box position highlighted in the viewport: screenshot
And now it gets interesting. Apparently, the DOM box of the element gets shifted as soon as the bottom bar disappears. Or rather: The initial viewport (when the bottom bar is visible) doesn't change, because the box is still located at the same position.
So you can in fact still click/touch the button but in an area above it.
You can see this behavior in the screen recording below:
Cookie banner is repositioned as expected
Interestingly, the behavior of the cookie banner (hidden in the screen recording because already confirmed) looks as expected though. So what's the difference to the button?
Workaround and working solution: move the button above the #ocs-site element
Apparently, after quite a lot of experiments, I realized the only difference between the button (incorrect behavior) and cookie banner (correct behavior) is the fact, that the cookie banner is in a rather top level of the DOM, whereas the button is nested quite deep in the tree.
Finally, I could find a working solution that makes the button behave as expected. Here you can see the correct scrolling behavior:
The solution I've come up with is to move the .ocs-trigger button above the #ocs-site div element. This fixes the incorrect scrolling behavior when the bottom bar disappears/appears.
Also, apply some styles on the .ocs-trigger element for the correct positioning.
position: fixed;
bottom: 10px;
z-index: 11;
left: 0;
right: 0;
Here you see the final DOM in a screenshot:
Please note, that you probably have to apply additional styling changes. This solution's major aspect was to get rid of the incorrect scrolling behavior.
Follow-up: Firefox Bug? Seems to me.
As it still appears to me at this moment, I would say this is a bug in the mobile Firefox implementation. My guess is, that the viewport calculations are somehow incorrect for nested elements.
In order to get some attention on this topic, I would recommend you to share these investigations and documentation with the Mozilla team at https://github.com/mozilla-mobile/fenix/issues. Let me know if I can help you with this.

Fixed Element on Android going appearing offscreen

I have a fixed footer with bottom: 0. It works fine except on android it is appearing below the screen. I have some other fixed elements that are also appearing off screen. For some reason I cant container them within the screen I've searched around and tried a view things but no joy. My guess is that if I change something in the viewport it will fix it. The image was taken from google chrome emulating the site on an S4 but the same problem persists on my actual phone also. The code for the footer should just make it sit at the bottom and it works fine in other browsers. I can change the value of bottom to around 26px then the whole footer becomes visible on the screen but that is not the fix I want. Any ideas?
.footer-fixed{
position: fixed;
bottom: 0;
z-index: 99;
width:100%;
background-color: #111;
height: 50px;
}

i've had this issue before,
but only on android versions lower then 4.4, so maybe you could tell me what android version you are working on,
try adding:
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, user-scalable=yes"/>
to your
<head></head>
on Android < 2.3 devices for elements that are fixed behave as "STATIC", (thats why your top element could be functioning normally, because its the first element and pushes the rest down)
Android 2.3 supports it but u need to disable viewport scaling as i think once written by bradfrost cant exactly remember, it was a while ago
if you experience flickering of the elment try adding
-webkit-backface-visibility: hidden;
to your css class, or even extend it with
-webkit-transform: translate3d(0,0,0); makes some devices run their hardware acceleration.
-webkit-perspective: 1000;
its solves the flickering, but the thing is on some android versions you only need to add the backface-visibility hidden and on some the other 2 rules (trial and error). i should go for the first one, (at first) because adding the translate 3d, will drain more battery
anyways if its just a website try the solution above,
if you are making a cordova app, try adding https://crosswalk-project.org/ which add their own webview to your cordova package solving all these browser quirks on android.
--
a sidenote
when a element has position fixed, its display will be set to block,
and you have width: 100% on your elment, so if you are not using box-sizing:border-box;
the element would have a width of 100% + padding + margin added to it,
i don't know the rest of your css, maybe you are setting margin or padding by a container class which is
(check the metrics of your element with chrome inspector)
If this is the case you could do 2 things
change display
width: 100% to auto;
or add: http://www.paulirish.com/2012/box-sizing-border-box-ftw/
box-sizing: -webkit-box-sizing: border-box;
or add normalize: https://necolas.github.io/normalize.css/ to your project, above your own css (link tag) within the head (Normalize.css makes browsers render all elements more consistently and in line with modern standards. It precisely targets only the styles that need normalizing.)

Android tablet browser select box height compatibility issue

Although my site isn't the best, it's a mash of HTML and isn't even responsive, it works as expected in every browser except for the Android Browser. I have a secreenshot below of the select box in the android browser, and then in every other browser. I'm really not sure how to approach this as I generally work things out in the end with trial and error, and like I said my code really isn't that good!
Any help would really be appreciated :) thanks very much.
Android (using www.modern.ie to test):
Other browsers:
The CSS for the select box:
#form .input-select {
background: url(../images/field-bg.png) repeat-x;
height: 30px;
width: 210px;
border: 1px solid #c2c2c2;
border-radius: .2em;
font-size: 14px;
padding: 5px;
-webkit-appearance:menulist;

Form elements are among the most unreliable parts of HTML/CSS regarding cross-browser rendering consistency. Especially some properties of the box model (height in conclusion with border or padding) are troublesome.
Citing from that article:
Developers tried to fix this problem by turning these elements [input, select] into block-level elements. [...] A common pattern to solve this problem is to avoid the height property and instead to use the font-size and padding properties.
A great CSS collection to start with is normalize.css. You should think about using (parts of) it, to get as much rendering consistency as possible.
You are already using em as unit for border-radius, for scalability in older browsers, especially IE 6-8, you could go for ems for all length units.
I've forked your fiddle, to include those ideas. See http://jsfiddle.net/Volker_E/4v3sm71g/
By the way, Chrome v36.0.x on Android 4.4 doesn't show a difference at all per default.

#form .input-select {
? float:right; ?
clear:right;
}
#form label {
? float:left; ?
clear:left;
}

Quite annoying margin in Safari?

thanks for any help in advance.
I'm 16, almost 17, and I've been working with HTML(5)/CSS(3)/PHP/SQL for a little over five years. But there is one problem I have never been able to fix. I've "tried everything under the sun", but there is a very annoying margin to the right of one of my floated elements that I've never been able to get rid of on any of my pages.
Here's the link: http://www.protodevelopment.de (It's in German, don't worry about the content.)
If you call up the page on a Windows/Android Device, there isn't the slightest problem. But as soon as you look for it on any version of Safari, mobile or desktop, there's the margin on the right.
Again, thanks for any suggestions in advance.
Image is here: http://tinypic.com/r/ekht2r/8

Are you talking about the small white line in the header and footer on the right side? It's the fact that you're calling width: 94% on those elements. Since the container has a width percentage of 75% just use width: 100% and it will extend those to the edge.
EDIT: That is the issue. If you are concerned with the padding use:
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
That will keep the box padding from extending past the desired width/height. Then you can set the width to 100%. Set border-box on any element that will receive the padding (ex: header and footer)

Make background cover all screen sizes

I have a code which makes a background picture cover the whole screen, not just the content. It works fine with a computer and an iPhone but with an android the picture doesn't stretch length wise to cover the whole screen vertically. The code is as follows.
CSS:
body {
background-image:url(background.png);
border:none;
background-size:100%;
-webkit-background-size:100%;
-moz-background-size:100%;
-o-background-size:100%;
background-attachment:fixed;
background-repeat:repeat-x;
}
The image is 5x500 pixels. If you have a better solution to cover a page with a background image then let me know.

Background size can ggive problems sometimes. Try adding a min-height to html
Try Adding
min-height: 100%;
to the body

Try setting your properties like this:
background-size: 100% 100%;
-webkit-background-size: 100% 100%;
-moz-background-size: 100% 100%;
-o-background-size: 100% 100%;
backround-size can be finicky.

Have you looked at background-size:contain? Personally, I am a fan of background-size:cover, which may help as well.
I came across this post because I was looking at an Android background size issue. If it doesn't help the OP, at least hopefully, it will help someone else.
The android issue is related I experienced was Android not liking the shorthand for background and having a background-position and a background-size. Separating, like it looks like you have, solved the issue.