Home >Web Front-end >CSS Tutorial >What Does the '\9' in a CSS `width` Property Declaration Do?

What Does the '\9' in a CSS `width` Property Declaration Do?

Patricia Arquette
Patricia ArquetteOriginal
2024-12-13 19:51:12146browse

What Does the

Understanding the Use of "9" in CSS Width Property Declarations

In the realm of CSS, one may encounter declarations like this:

width: 500px;

This enigmatic syntax raises questions about its purpose. The significance lies in the "9," which operates as a browser hack specifically targeting Internet Explorer versions 7, 8, and 9.

This hack denotes that the CSS rule following "9;" applies exclusively within the aforementioned IE versions. In the provided example, the element's width will be set to 500 pixels solely in IE 7, 8, and 9 browsers.

To illustrate, consider the following CSS:

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

The result: within Internet Explorer 7, 8, or 9, the width of #myElement will be 500 pixels. In all other browsers, the width remains at 300 pixels.

This circumvents any potential styling conflicts or browser inconsistencies, allowing for tailored website rendering in specific browser versions. However, it's crucial to note that such browser hacks have become increasingly obsolete with the advent of more standardized and cross-browser compatible CSS methods.

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

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn