Can anyone explain how Facebook manages to vertically align its photos without using padding or margins? I've looked into their img tag and its parent, but neither seem to have any spacing properties. Although there is a vertical-align attribute present, it doesn't appear to influence the alignment in this case (refer to Image not vertical-align:middle). Typically, I use margins or sometimes JavaScript for vertical alignment, so I'm curious about Facebook's technique. Any insights?
My investigation on the Facebook website led me to discover the solution. Below is the code snippet:
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.img_contain {
height: 700px;
text-align: center;
line-height: 700px;
border: #333333 1px solid;
}
.img_contain img {
display: inline-block;
vertical-align: middle;
}
</style>
</head>
<body>
<div class="img_contain">
<img src="images/image.jpg" />
</div>
</body>
</html>
The key missing element was including <!DOCTYPE html> at the beginning of the document, which resolved the issue.Additionally, it is important for the parent's height and line-height to be equal and greater than the image it contains.
CODE VERIFIED with display: table-cell property
<!DOCTYPE html>
<html>
<head>
<title>Another Feed - StackOverflow Edition</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
</head>
<body>
<div style="height: 500px; min-height: 500px; width: 500px; border: 1px solid; display: table-cell; vertical-align: middle; text-align: center">
<img src="http://anotherfeed.com/facebook_icon.png" style="display: inline-block; margin-left: auto; margin-right: auto;" />
</div>
</body>
</html>
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