HTML5 and CSS3 technology come out also need to learn CSS2?

HTML5 and CSS3 technology come out also need to learn CSS2?

The answer is that you have to learn CSS version 2.0 technology.

Because CSS3 adds some effects based on the CSS2 version upgrade, these layout effects can only be rendered by the high-version IE browser.

Learned the CSS2 corresponding CSS3 only need to understand the next can be used.

The counterpart therapist HTML5 is also based on the HTML4 version of the upgrade, adding customizable labels, such as previous <div id= "header" ></div> layout page header, HTML5 can be directly

In terms of compatibility, now IE6-IE8 incompatible with CSS3 technology, that is, Shanghai treatment of premature ejaculation hospital use of CSS3 rendering layout in the old version of the browser can not experience but will cause compatibility problems.

Summary:

Whether or not you learn CSS3 technology directly, you will eventually go back to learning CSS2.0 (usually the CSS layout we're talking about is based on the CSS2.0 version specification, or CSS). For example, you use iphone4 and iphone4s, the essence has not changed, just do some improvement, more functions.

HTML5 and CSS3 technology come out also need to learn CSS2?