iPad Safari scrolling causes HTML elements to disappear and reappear with a delay

Question

I m currently developing a web app using html5 and jQuery for iPad Safari  I m running into a problem wherein large scroll areas cause the elements that are offscreen to appear after a delay when I scroll down to them   What I mean by that is  if I have a row of images  or even a div with a gradient  that is offscreen  when I scroll down  or up  to it  the expected behavior is for the element to appear on screen as I am scrolling to it   However  what I m seeing is that the element does not appear until I lift my finger off the screen and the scroller finishes all its animations   This is causing a super noticeable problem for me  making the whole thing look choppy  although it is not  I m guessing the iPad Safari is trying to do something to save memory  Is there any way in which I can prevent this choppy-ness from happening  Additionally  I would also appreciate if anyone can shed light on what the iPad Safari is actually trying to do

User · Answer

Adding -webkit-transform  translate3d 0 0 0  to an element statically doesn t work for me   I apply this property dynamically  For example  when a page is scrolled  I set -webkit-transform  translate3d 0 0 0  on a element  Then after a short delay  I reset this property  that is  -webkit-transform  none This approach seems to work   Thank you   Colin Williams for pointing me in the right direction

User · Answer

In my case  an iOS Phonegap app   applying translate3d to relative child elements did not resolve the issue  My scrollable element didn t have a set height as it was absolutely positioned and I was defining the top and bottom positions   What fixed it for me was adding a min-height  of 100px

User · Answer

I had the same issue with iscroll 4 2 5 on ios7  The whole scroll element just disappear  I ve tried to add translate3d 0 0 0  as was suggested here  it have solved the problem  but it disabled the iscroll  snap  effect  The solution came with giving  position relative  z-index 1000 display block  css properties to the whole container that holds the scroll element and there is no need to give translate3d to child elements

User · Answer

I m pretty darn sure I just solved this with   overflow-y  auto     Presumably just overflow  auto  would work too depending on your needs

User · Answer

I had the same issue using an older version of Fancybox   Upgrading to v3 will solve your problem OR you can just add   html  body       -webkit-overflow-scrolling   touch  important      overflow  auto  important      height  100   important

User · Answer

When the translate3d doesn t work  try to add perspective  It always works for me  transform  translate3d 0  0  0   -webkit-transform  translate3d 0  0  0   perspective  1000  -webkit-perspective  1000    http   blog teamtreehouse com increase-your-sites-performance-with-hardware-accelerated-css

User · Answer

Targeting all elements but html      not html  caused problems on other elements in my case  It modified the stacking context  causing some z-index to break   We should better try to target the right element and apply -webkit-transform  translate3d 0 0 0  to it only   Edit   sometimes the translate3D 0 0 0  doesn t work  we can use the following method  targeting the right element     keyframes redraw      0   opacity  1       100   opacity   99         ios redraw fix animation  redraw 1s linear infinite

User · Answer

You need to trick the browser to use hardware acceleration more effectively  You can do this with an empty 3d transform   -webkit-transform  translate3d 0 0 0    Particularly  you ll need this on child elements that have a position relative  declaration  or  just go all out and do it to all child elements    Not a guaranteed fix  but fairly successful most of the time   Hat tip  https   web archive org web 20131005175118 http   cantina co 2012 03 06 ios-5-native-scrolling-grins-and-gothcas

User · Answer

This is the complete answer to my question  I had originally marked  Colin Williams  answer as the correct answer  as it helped me get to the complete solution  A community member   Slipp D  Thompson edited my question  after about 2 5 years of me having asked it  and told me I was abusing SO s Q  amp  A format  He also told me to separately post this as the answer  So here s the complete answer that solved my problem    Colin Williams  thank you  Your answer and the article you linked out to gave me a lead to try something with CSS   So  I was using translate3d before  It produced unwanted results  Basically  it would chop off and NOT RENDER elements that were offscreen  until I interacted with them  So  basically  in landscape orientation  half of my site that was offscreen was not being shown  This is a iPad web app  owing to which I was in a fix   Applying translate3d to relatively positioned elements solved the problem for those elements  but other elements stopped rendering  once offscreen  The elements that I couldn t interact with  artwork  would never render again  unless I reloaded the page   The complete solution     not html        -webkit-transform  translate3d 0  0  0       Now  although this might not be the most  efficient  solution  it was the only one that works  Mobile Safari does not render the elements that are offscreen  or sometimes renders erratically  when using -webkit-overflow-scrolling  touch  Unless a translate3d is applied to all other elements that might go offscreen owing to that scroll  those elements will be chopped off after scrolling   So  thanks again  and hope this helps some other lost soul  This surely helped me big time

User · Answer

In my case  CSS did not fix the issue   I noticed the problem while using jQuery re-render a button       myButton   html  text     Try this       myButton   html   lt span gt text lt  span gt

User · Answer

At time translate3d may not work  in those cases perspective can be used  transform  translate3d 0  0  0   -webkit-transform  translate3d 0  0  0   perspective  1000  -webkit-perspective  1000

User · Answer

the -webkit-transform  translate3d 0  0  0   trick didn t work for me   In my case I had set a parent to      parent height  100vh    Changing that to   height  auto  min-height  100vh    Solved the issue in case someone else is facing the same situation

User · Answer

This is a very common problem faced by developers and that is mainly due to Safari s property of not recreating elements defined as position   fixed   So either change the position property or some hack needs to be applied as mentioned in other answers   Link1  Link2

User · Answer

I faced this problem in a Framework7  amp  Cordova project  I tried all the solutions above  They did not solve my problem     In my case  I was using 10  css animations on the same page with infinite rotation  transform   I had to remove the animations  It is ok now with the lack of some visual features   If the solutions above do not help you  you may start eliminating some animations

User · Answer

There are cases where a rotation is applied and or a Z index is used   Rotation  An existing declaration of -webkit-transform to rotate an element might not be enough to tackle the appearance problem as well  like -webkit-transform  rotate -45deg    In this case you can use -webkit-transform  translateZ 0px  rotateZ -45deg  as a trick  mind the rotateZ    Z index  Together with the rotation you might define a positive z-index property  like z-index  42  The above steps described under  Rotation  were in my case enough to resolve the issue  even with the empty translateZ 0px   I suspect though that the Z index in this case may have caused the disappearing and reappearing in the first place  In any case the z-index  42 property needs to be kept -- -webkit-transform  translateZ 42px  only is not enough

[css] iPad Safari scrolling causes HTML elements to disappear and reappear with a delay

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