A minuscule space appearing exclusively on iPad devices, yet displaying properly on both Safari and Chrome browsers

Question

A minuscule space appearing exclusively on iPad devices, yet displaying properly on both Safari and Chrome browsers

Just past the clouds there is content that will only appear on iPad or iPhone. Any suggestions on how to fix this?

It displays correctly in all other desktop browsers.

CSS

#banner-inner { height: 270px; margin: 0 auto; position: relative; width: 954px;}

.cloud-bottom { position: absolute; background: url(images/clouds_dark.png) repeat-x 0 bottom ; z-index: 1; width:100%;height:111px;bottom:0}

.cloud-top { position: absolute; background: url(images/clouds_light.png) repeat-x 0 bottom ; z-index: 4;width:100%;height:111px;bottom:0}

iphone html css ipad

Answer 1

Answer №1

This issue appears to be a bug specific to the WebKit rendering engine on iPad devices, especially when the page scale factor is set below 1.0. To avoid encountering this pixel gap problem, it is recommended to maintain the page scale factor at or above 1.0 by using the following meta tag:

<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, width=device-width">

A similar glitch can be observed in a simple page example that demonstrates this issue exclusively on iPads:

Rounding error with widths

Historically, there have been several reported bugs related to rounding errors within the WebKit engine:

WebKit Bug #5531
WebKit Bug #14956
WebKit Bug #18013

Answer 2

This issue appears to be a bug specific to the WebKit rendering engine on iPad devices, especially when the page scale factor is set below 1.0. To avoid encountering this pixel gap problem, it is recommended to maintain the page scale factor at or above 1.0 by using the following meta tag:

<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, width=device-width">

A similar glitch can be observed in a simple page example that demonstrates this issue exclusively on iPads:

Rounding error with widths

Historically, there have been several reported bugs related to rounding errors within the WebKit engine:

WebKit Bug #5531
WebKit Bug #14956
WebKit Bug #18013

Answer 3

Answer №2

If you prefer to keep zoom enabled and the margin trick doesn't do the job (especially with background images), here's an alternative workaround:

Adjust all background images to be 1 or 2 pixels larger by duplicating a small portion of the graphics above or below them. Then, utilize CSS properties like background-size and background-position to hide the extra pixel, preventing it from being visible unless necessary for filling rendering gaps.

This method has been successfully tested to resolve rendering issues in Android's 2.3 default browser and address zooming errors in Chrome on PC. Further testing will be conducted on iOS devices on Monday.

Answer 4

If you prefer to keep zoom enabled and the margin trick doesn't do the job (especially with background images), here's an alternative workaround:

Adjust all background images to be 1 or 2 pixels larger by duplicating a small portion of the graphics above or below them. Then, utilize CSS properties like background-size and background-position to hide the extra pixel, preventing it from being visible unless necessary for filling rendering gaps.

This method has been successfully tested to resolve rendering issues in Android's 2.3 default browser and address zooming errors in Chrome on PC. Further testing will be conducted on iOS devices on Monday.

Answer 5

Answer №3

To address the sub pixel gap issue on iOS for a full screen website, I successfully implemented a solution. I utilized overflow-x: hidden; to prevent horizontal scrolling and viewport scale to prevent pitch zooming. Additionally, I strategically placed holder divs with a width of 101% and set all elements/image divs inside to float: left;. As a result, the sub pixel gaps are confined to the left side and remain out of view due to the wider holder div.

Answer 6

To address the sub pixel gap issue on iOS for a full screen website, I successfully implemented a solution. I utilized overflow-x: hidden; to prevent horizontal scrolling and viewport scale to prevent pitch zooming. Additionally, I strategically placed holder divs with a width of 101% and set all elements/image divs inside to float: left;. As a result, the sub pixel gaps are confined to the left side and remain out of view due to the wider holder div.

Answer 7

Answer №4

Give this a try:

#container {
     margin: 0 auto;
... continue styling here....

}

It's possible that there may be a minor resolution issue as well, so consider adjusting the following:

#container {
    background-color: #ffffff;
... continue styling here....

}

Hopefully one of these solutions will solve the problem for you :)

UPDATE:

I believe I've figured it out,

remove background-color from #container;

remove background styling from #banner-switcher

Answer 8

Give this a try:

#container {
     margin: 0 auto;
... continue styling here....

}

It's possible that there may be a minor resolution issue as well, so consider adjusting the following:

#container {
    background-color: #ffffff;
... continue styling here....

}

Hopefully one of these solutions will solve the problem for you :)

UPDATE:

I believe I've figured it out,

remove background-color from #container;

remove background styling from #banner-switcher

Answer 9

Answer №5

It is recommended to adjust the height of the #banner using pixels (PX) rather than ems (EM). Additionally, ensure that the height of the cloud is set to 112px and 113px, not 111px for both instances.

Answer 10

It is recommended to adjust the height of the #banner using pixels (PX) rather than ems (EM). Additionally, ensure that the height of the cloud is set to 112px and 113px, not 111px for both instances.

Answer 11

Answer №6

My research has shown that this issue is often caused by scaling up background images to fit the resolution of the device. I believe the problem arises from a slight color bleed along the edges of the image, which can typically be fixed by providing an additional version of the background specifically for high pixel density displays (such as Retina displays).

I've personally had great success with the following workaround:

.your-thing {
    background-repeat: no-repeat;
    background-image: url('img/your-background.png');
    background-size: 400px; /* width of "your-background.png" */
}

@media only screen and (-webkit-min-device-pixel-ratio: 2),
only screen and (min--moz-device-pixel-ratio: 2) {
    .your-thing {
        /* override with version which is exactly 2x larger */
        background-image: url('img/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="463f2933346b2427252d21342933282206743e68362821">[email protected]</a>');
    }
}

This solution worked like a charm in my situation.

Answer 12

My research has shown that this issue is often caused by scaling up background images to fit the resolution of the device. I believe the problem arises from a slight color bleed along the edges of the image, which can typically be fixed by providing an additional version of the background specifically for high pixel density displays (such as Retina displays).

I've personally had great success with the following workaround:

.your-thing {
    background-repeat: no-repeat;
    background-image: url('img/your-background.png');
    background-size: 400px; /* width of "your-background.png" */
}

@media only screen and (-webkit-min-device-pixel-ratio: 2),
only screen and (min--moz-device-pixel-ratio: 2) {
    .your-thing {
        /* override with version which is exactly 2x larger */
        background-image: url('img/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="463f2933346b2427252d21342933282206743e68362821">[email protected]</a>');
    }
}

This solution worked like a charm in my situation.

Answer 13

Answer №7

Interesting phenomenon, occurs when transparency is disabled. Even in jpg format, the artifact is still visible. Appears to be a glitch in the webkit rendering engine.

Answer 14

Interesting phenomenon, occurs when transparency is disabled. Even in jpg format, the artifact is still visible. Appears to be a glitch in the webkit rendering engine.

A minuscule space appearing exclusively on iPad devices, yet displaying properly on both Safari and Chrome browsers

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

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