What does css hack mean?

css hack is to add some special symbols to the css style so that different browsers can recognize different symbols, thereby achieving the purpose of applying different css styles. The purpose of css hack is to make our css code compatible with different browsers.

CSS hack is to allow different browsers to recognize different symbols by adding some special symbols to CSS styles (what browsers recognize what There are standards for symbols, and CSS hack is to let you remember this standard) in order to achieve the purpose of applying different CSS styles.

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Detailed description:

CSS hack Due to the browsers of different manufacturers, such as Internet Explorer, Safari , Mozilla Firefox, Chrome, etc., or different versions of browsers from the same manufacturer, such as IE6 and IE7, do not have exactly the same understanding of CSS parsing, so the generated page effects will be different and we will not get the page we need. Effect. At this time, we need to write different CSS for different browsers so that it can be compatible with different browsers at the same time and get the page effects we want in different browsers.

Simply put, the purpose of CSS hack is to make your CSS code compatible with different browsers. Of course, we can also use CSS hack to customize and write different CSS effects for different versions of browsers.

CSS Hack generally has three forms of expression, CSS class internal Hack, selector Hack and HTML header reference (if IE) Hack. CSS Hack mainly targets internal class Hack: for example, IE6 can recognize the underscore "_" and asterisk " * ", IE7 can recognize the asterisk " * ", but not the underscore "_", and Firefox cannot recognize both.

Selector Hack: For example, IE6 can recognize *html .class{}, IE7 can recognize *html .class{} or *:first-child html .class{}.

HTML Header Reference (if IE) Hack: For all IE: , for IE6 and below: , this kind of Hack is not only It takes effect on CSS and all code written in the judgment statement.

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