Can you please explain the functionality of this CSS code?

*:first-child+html .clearfix{zoom:1px;}

Can anyone explain the purpose of this code snippet? I noticed it was causing elements to render at 1px in Internet Explorer 7. This code is present in the style.css file of my WordPress theme (created by ElegantTheme). Is this a bug in Internet Explorer or does it serve a specific function?

Answer №1

To ensure proper alignment of all elements with the clearfix class in IE7, the non-standard zoom property is used to give them layout.

The *:first-child + html selector, also known as * + html, takes advantage of IE7's incorrect belief that there is a preceding element before html. This technique is considered a hack and can be found at this link.

In my opinion, the correct declaration should have been zoom: 1; instead of zoom: 1px;.

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