CSS + DIV summary, css div Summary

CSS + DIV summary, css div Summary

CSS is a markup language used to control webpage styles and separate style information from webpage content. It is introduced to make the HTML language better adapt to the page art design.

CSS + DIV are put together because DIV is used as a block tag in HTML. CSS can use DIV labels to control the style of webpages.

CSS is inserted into HTML as a style sheet. When you read a style sheet, the browser will format the HTML document based on it. The methods for inserting the style sheet are: Intra-row and embedded, imported and linked. Of course, CSS has a certain rule, which consists of a selector and one or more declarations. Each declaration consists of one attribute and one value. Here is a detailed problem. Do not leave spaces between the attribute value and the Unit. If you use "margin-left: 20 px" instead of "margin-left: 20px", it is only valid in IE 6, however, it cannot work normally in Mozilla/Firefox or Netscape. In addition, in CSS, the class selector is displayed with a dot: the first character of the class name cannot use a number (it cannot play a role in Mozilla or Firefox ). CSS is case insensitive. However, there is an exception: if it involves working with HTML documents, the class and id names are case sensitive.

In addition to separating content and styles, CSS allows designers to make modifications more efficient and cost-effective. It also ensures visual consistency of the entire site and enables faster loading of webpages, when I learned this part, I watched CSS achieve the same effect. I was amazed at the magical power of CSS. In addition, I learned a little about my own operations and only had to do more, while writing code, you will be more impressed with the preview effect.