Play button icon is missing in Firefox when using absolute positioning

Question

Play button icon is missing in Firefox when using absolute positioning

I'm currently experiencing an issue with my video gallery section. I have both normal and hover versions of a play button positioned above a preview image of a video. However, the play buttons are not visible at all in Firefox. You can view the page here, and here is the code snippet:

<div class="videoPreview">
    <div class="videoPreviewImg">
        <img src="img/promo/groupFitness.jpg">
        <i class="playButtonHover"></i>
        <i class="playButton"></i>
    </div>
</div>

div.videoPreview {
  float: left;
  display: inline-block;
  width: 21%;
  margin: 2%;
  margin-bottom: 0;
}

div.videoPreview:last-child {
  margin-bottom: 2%;
}

div.videoPreviewImg { 
  position: relative;

}

div.videoPreviewImg img {
  max-width: 100%;
  z-index: 1;
}

div.videoPreviewImg i {
  position: absolute;
  z-index: 5;
  top: 50%;
  left: 50%;
  margin-top: -24px;
  margin-left: -24px;
  -webkit-transition: opacity .7s ease-in-out;
  -moz-transition: opacity .7s ease-in-out;
  -o-transition: opacity .7s ease-in-out;
  transition: opacity .7s ease-in-out;
}

div.videoPreviewImg:hover i.playButton {
  opacity: 0;
}

I would really appreciate any assistance with this problem!

css css-position

Answer 1

Answer №1

div.videoPreviewImg { 
  position: relative;
}

The 'wrapping' div that contains the playbuttons is set to a relative position, while the playbuttons themselves are set to an absolute position.

Absolutely positioned elements are taken out of the normal flow of the document. They position themselves in relation to their closest positioned ancestor. When a wrapping div is set to relative positioning, absolutely positioned children will align themselves within that parent. However, because the absolutely positioned element is no longer part of the flow, the parent div might collapse as it appears empty to its content area.

If there is no explicitly positioned containing div, then the absolutely positioned element will reference the next level up parent for its positioning.

You have two options: you can change the position of the playbuttons to absolute:

div.videoPreviewImg { 
    position: absolute;
}

Or you can try setting the position of the playbuttons to relative and adjusting their appearance using margins.

Be aware that different browsers might interpret these positioning rules differently, so don't solely rely on one browser for testing.

UPDATE

After checking your website in Firefox version 3.6.28, I noticed something interesting:

The first preview button displays correctly, but upon further inspection of your code, I found an issue with how the playbuttons are declared for the other videos:

<i class="playButtonHover"></i>
<i class="playButton"></i>

These should actually be like this:

<img class="playButtonHover" src="../img/playButtonHover.png">
<img class="playButton" src="../img/playButton.png">

So, even though the buttons do appear, they lack an image source for display.

I also noticed that Chrome seems to fix some syntax errors automatically, which might explain why it works in that browser despite the incorrect syntax.

To resolve this issue, make sure to use the correct syntax for the playbuttons by replacing the i tags with either divs or img tags.

Good luck!

Answer 2

div.videoPreviewImg { 
  position: relative;
}

The 'wrapping' div that contains the playbuttons is set to a relative position, while the playbuttons themselves are set to an absolute position.

Absolutely positioned elements are taken out of the normal flow of the document. They position themselves in relation to their closest positioned ancestor. When a wrapping div is set to relative positioning, absolutely positioned children will align themselves within that parent. However, because the absolutely positioned element is no longer part of the flow, the parent div might collapse as it appears empty to its content area.

If there is no explicitly positioned containing div, then the absolutely positioned element will reference the next level up parent for its positioning.

You have two options: you can change the position of the playbuttons to absolute:

div.videoPreviewImg { 
    position: absolute;
}

Or you can try setting the position of the playbuttons to relative and adjusting their appearance using margins.

Be aware that different browsers might interpret these positioning rules differently, so don't solely rely on one browser for testing.

UPDATE

After checking your website in Firefox version 3.6.28, I noticed something interesting:

The first preview button displays correctly, but upon further inspection of your code, I found an issue with how the playbuttons are declared for the other videos:

<i class="playButtonHover"></i>
<i class="playButton"></i>

These should actually be like this:

<img class="playButtonHover" src="../img/playButtonHover.png">
<img class="playButton" src="../img/playButton.png">

So, even though the buttons do appear, they lack an image source for display.

I also noticed that Chrome seems to fix some syntax errors automatically, which might explain why it works in that browser despite the incorrect syntax.

To resolve this issue, make sure to use the correct syntax for the playbuttons by replacing the i tags with either divs or img tags.

Good luck!

Answer 3

Answer №2

Apologies for my focus on the main slideshow/video player yesterday...

To correct the other play buttons, modify:

.playButton {
  content: url(../img/playButton.png);
}
.playButtonHover {
  content: url(../img/playButtonHover.png);
}

to

.playButton {
  background: url(../img/playButton.png);
}
.playButtonHover {
  background: url(../img/playButtonHover.png);
}

and specify a specific size, for example:

div.videoPreviewImg i {
  position: absolute;
  z-index: 5;
  top: 50%;
  left: 50%;
  margin-top: -24px;
  margin-left: -24px;
  -webkit-transition: opacity .7s ease-in-out;
  -moz-transition: opacity .7s ease-in-out;
  -o-transition: opacity .7s ease-in-out;
  transition: opacity .7s ease-in-out;
  width:48px;
  height:48px;
}

Lastly, assign a fixed width to the video preview instead of a max-width:

div.videoPreviewImg img {
  width: 100%;
  z-index: 1;
}

The content CSS property is utilized with the ::before and ::after pseudo-elements to generate content within an element. Objects inserted using the content property are anonymous replaced elements. - MDN

Content CSS | MDN
You were inadvertently misusing the content property, resulting in inconsistent outcomes. Visit the link provided above for further clarification.

Answer 4

Apologies for my focus on the main slideshow/video player yesterday...

To correct the other play buttons, modify:

.playButton {
  content: url(../img/playButton.png);
}
.playButtonHover {
  content: url(../img/playButtonHover.png);
}

to

.playButton {
  background: url(../img/playButton.png);
}
.playButtonHover {
  background: url(../img/playButtonHover.png);
}

and specify a specific size, for example:

div.videoPreviewImg i {
  position: absolute;
  z-index: 5;
  top: 50%;
  left: 50%;
  margin-top: -24px;
  margin-left: -24px;
  -webkit-transition: opacity .7s ease-in-out;
  -moz-transition: opacity .7s ease-in-out;
  -o-transition: opacity .7s ease-in-out;
  transition: opacity .7s ease-in-out;
  width:48px;
  height:48px;
}

Lastly, assign a fixed width to the video preview instead of a max-width:

div.videoPreviewImg img {
  width: 100%;
  z-index: 1;
}

The content CSS property is utilized with the ::before and ::after pseudo-elements to generate content within an element. Objects inserted using the content property are anonymous replaced elements. - MDN

Content CSS | MDN
You were inadvertently misusing the content property, resulting in inconsistent outcomes. Visit the link provided above for further clarification.

Answer 5

Answer №3

After some investigation, I believe I have identified the problem and found a solution. Huge thanks to everyone for their contributions and suggestions. It turns out that when I used buttons as images instead of icons, they displayed properly in Firefox. Although this goes against my preference since buttons are not technically considered content, it seems to be the only effective workaround so far. Once again, thank you all for your help!

Answer 6

After some investigation, I believe I have identified the problem and found a solution. Huge thanks to everyone for their contributions and suggestions. It turns out that when I used buttons as images instead of icons, they displayed properly in Firefox. Although this goes against my preference since buttons are not technically considered content, it seems to be the only effective workaround so far. Once again, thank you all for your help!

Play button icon is missing in Firefox when using absolute positioning

Answer №1

UPDATE

Answer №2

Answer №3

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