What is CSS? What can it do?

CSS CSS is a technique called style sheet (stylesheet). Some people call it cascading style sheets (cascading Stylesheet).

CSS technology is used on the homepage to effectively control the layout, font, color, background and other effects of the page.

As long as you make some simple changes to the corresponding code, you can change the different parts of the same page, or the appearance and format of pages with different pages.

Its function can be achieved by:

(1) can be used in almost all browsers.

(2) Some of the previous features must be implemented through the image conversion, now as long as the use of CSS can be easily implemented, so faster to download the page.

(3) Make the font of the page become more beautiful, easier to arrange, so that the page really pleasing.

(4) You can easily control the layout of the page.

(5) You can update the style of many web pages at the same time without having to update one page after another. You can use a CSS file to control all of the page styles on the site, as long as you modify the corresponding line in the CSS file, then all pages of the entire site will change.

Think about how we control the color and size of the font and the font used before using CSS? We generally use HTML tags to implement, such as implementing a simple "HELLO" on the right, and its code is:
<b><font face= "Arial" size= "3" color= "#FFFF66" >HELLO</font></b>

It is hard to imagine that the resulting HTML code must be bloated in length if the color of the font is frequently replaced on a page.

To tell the truth, CSS is to simplify the birth of such a job, of course, its function is not so simple.

CSS is to control the style of the whole page through the idea of the style control of the page structure.

Model sheets on the page, through the interpretation of the browser to execute, is complete text, anyone who knows HTML can master, very easy. Reproduction on some very old browsers, the page does not create a page clutter phenomenon.