We have a website whose background is a stack of images through which we go with JavaScript.
We check whether the next image is loaded before switching to it, and it works fine on Chrome, Safari, IE, and all mobile browsers, however on Firefox we sometimes get a white flash.
This problem also happens if we make sure that all the images are preloaded so it's not a problem that FF shows the image before it has finished loading. I've seen the question asked elsewhere but from the user's perspective, and the solution was to disable hardware graphics acceleration, which does not solve completely the problem but reduces it. However we obviously can't ask that from our users.
Similar problems were reported in other questions:
jquery animate (height) causes background-image flickering in firefox
Image Flickering only in Firefox
Firefox background image flickering when using multiple instances and background-size
skrollr background image flicker in Firefox
However none has a clear solution. Does anyone know how to correct for this?
Cheers!
Related
When working on a website on my local server, I came across an issue with Croppie.js. The issue only happens when a modal is used to crop the image — for example, everything works fine here:
[codepen](https://codepen.io/azerafati/pen/VzOGRe)
I was able to reconstruct the issue on Codepen using the following image.
The Issue
With a modal on Codepen, the issue only happens in the Editor view — Image B:
[codepen](https://codepen.io/amatek/pen/GREvEbG). Surprisingly, everything seems to work as expected in the Details view — Image A: [codepen](https://codepen.io/amatek/details/GREvEbG).
Normal behaviour: When using the zoom slider on the modal in the Details view, the image is transformed from the center.
The bug: However, the image is transformed from a corner when in the Editor view. This somehow leads to a black image being uploaded when the crop button is clicked.
Sometimes (depending on the amount of zoom applied), instead of a black image:
only the left side of the image is uploaded with the right side is
cut off; or
the image is uploaded zoomed in to the corner.
There is still misalignment even when the zoom is not applied.
Environment
From my tests so far, this issue does not happen on mobile browsers (although I only tested with Google Chrome and Mozilla Firefox). I have noticed the issue on Desktops with Windows 7 and 10 (I am yet to test on other Operating Systems).
Bug Present
Windows 10: Google Chrome and Microsoft Edge
Windows 7: Microsoft Edge
No Bug
Windows 10: Mozilla Firefox
Windows 7: Google Chrome and Mozilla Firefox
My Efforts so far
I have tried debugging the croppie.css and croppie.js files, but to no avail. However, I strongly suspect the problem lies in the js file. It might have something to do with the the css transform-origin property or the functions for obtaining the image dimensions returning different values on modals. Does anyone have an idea on what the cause of this issue might be?
Got this problem on latest Chrome when used croppie inside of modal
Helped me to change style in bootstrap modal .modal-dialog class
image
Style that you need to update
Setting transform to unset instead of using translate function.
Hope it helps you too
It appears that the extra padding applied to the outer modal div by bootstrap when triggering the modal('show') was what caused the problem, for me at least. Once I removed the extra padding the problem was fixed. Seems like this padding somehow messed with the point calculation when cropping or moving the viewport. I'm still using an older bootstrap version though, so I'm not sure if that would be a fix for the newer ones.
I had this problem on Chrome only probably caused by their last update, since everything was working fine for some time now. On Mozilla there were no issues to begin with.
Built a Jekyll website based on a 3-party theme (MASSIVELY).
Code of website available here: https://git.ikrypto.club/FNB_Japan/FNBJapan
When you visit the deployed website, the background image does not remain constant as expected (You can kind of see the expected behavior on the theme demo, https://iwiedenm.github.io/jekyll-theme-massively/ (Edit: This is actually a better example, https://massively.ghost.io/ ). Basically, the background image is expected to remain constant, and the foreground should scroll with the user.).
You can witness the difference in behavior if you go on our website, https://fnb-japan.info .
However, when the code is ran locally and built with
bundle exec jekyll serve
The background image does not move (as expected). What's happening and how can I remedy it?
Note: It appears that this problem only appears on FF Nightly, and not Chrome
Edit: This appears to be a problem with Firefox Nightly, as opposed to the website. This question is technically resolved.
Edit 2: It appears that the problem persists, and is due to a bad implementation of parallax scrolling causing parallax to flicker.
Edit 3: This problem only occurs once the window is of a certain width, and the difference isn'ta ctually between local/deployed but rather different window sizes.
The background div (#bg)
is being transformed by
this code in the bundled parallax plugin (as evident from setting a "break on attribute modification" on the bg element in the Chrome inspector), which in kind seems to be activated by this invocation:
// Background.
$wrapper._parallax(0.925);
Removing those lines should get rid of the parallax effect too.
I've ran into this very peculiar issue where the wordpress website I am working on (Click to see) , looks and works great on all browsers except Safari on iPhone.
The site seems to be loading and times out half way. Sometimes images appear in wrong places, sometimes they're cut off mid-image. We've tested the site on OSX, Windows, in Chrome, Safari, Firefox, and iOS Chrome and it appears to be working great. The interesting thing is that this problem seems to be exclusive to Mobile Safari, consistently across multiple devices from different networks.
Here's are a few examples of what we're seeing:
In this photo should be a background image and a menu icon in the nav.
And in this photo what is that image doing in there? There should be another logo and these should be scrolling right to left instead of being displayed vertically.
And in this one Some images don't load at all and some don't load all the way.
And also in this one same portion of the website as above, except nice and crisp, how it should look. This was using iOS Chrome.
We tried isolating the issue by switching over to the default Twenty Fifteen wordpress theme, where we created an image heavy blog post (without any widgets), and the issue persisted.
We've been clearing browser caches and using W3 Total Cache to clear WP cache, but no luck.
Also had the website host, Namecheap, reset the server configs, just in case that would solve the issue, but, alas, no luck either.
Has anyone run into this bizarre issue in the past? Any ideas what else we could try?
Thank you so much in advance!
Please have a look at this: http://www.eymy.nl
The transition works smoothly in all browsers, but becomes jerky in Safari when the images are scaled down (when the window height is smaller than 1227 pixels, which is the 100% height of the images). In other words, Safari cannot handle this transition together with scaling.
My guess is that it CAN, but needs different code. I tried different slideshow scripts and the results are always the same, the moment the images are scaled (down OR up) the transition in Safari becomes jerky.
Any advice will be greatly appreciated!
I'm using Chrome and Safari on a i7 MacBook Air and it was smoother in chrome. After the first image loaded in Safari which was choppy it looked OK. Since this seems like an issue of images loading before they are animated I would suggest preloading them. This is usually done in the body tag with JavaScript or you can also use CSS. See this page for ways to preload images.
In my web application I frequently have sections that need to be collapsed/expanded. I do this with jQuery using the slideDown() and slideUp() methods. They work great. However, in Firefox, if I am scrolled all the way to the bottom of the screen and I collapse a div the screen stutters and flashes as the div disappears and the page is automatically resized by the loss of the element.
Has anyone run into this problem before? I've been working around it by setting a min-height with a generous amount of space for any section that will be collapsible but this seems like an unnecessary solution. Chrome doesn't have this problem and, amazingly, neither does Internet Explorer, both of which smoothly resize the page without any sort of stutter or flashing.
I'm using Firefox 3.6 on Ubuntu and I've experienced this problem on earlier versions as well. I have not tested on Firefox 4.
I have ran into this problem before and yes. I have worked around this by setting a mini-height or consider not using a slide effect.