What Does the `\9` CSS Hack Do?

Unveiling the Secret of the 9 CSS Hack

Wondering what 9 stands for in CSS width declaration? Here's the lowdown:

This mysterious character is a CSS hack specifically tailored for Internet Explorer versions 7, 8, and 9. In essence, it means that only a single CSS declaration ending with 9; will be applied to IE browsers 7, 8, and 9.

Let's break down an example:

width: 500px;

This snippet translates to a width of 500 pixels, but only in Internet Explorer versions 7, 8, and 9. Other browsers will simply ignore this declaration.

Now, consider this CSS:

#myElement {
    width: 300px;
    width: 500px;
}

In IE 7, 8, and 9, #myElement will be 500 pixels wide. However, in all other browsers, it will be 300 pixels wide.

This hack is particularly useful for targeting specific CSS properties or values to different browsers, ensuring consistent visual experiences across various platforms.

Note: As of today, this hack not only works in IE 7, 8, and 9 but also in IE 10.

The above is the detailed content of What Does the `\9` CSS Hack Do?. For more information, please follow other related articles on the PHP Chinese website!