CSS formatting and compression tools
CSS provides a style description for the HTML markup language that defines how elements within it are displayed. CSS is a breakthrough in the field of web design. It can be used to modify a small style to update all page elements related to it.
CSS has the following characteristics:
Rich style definitions
CSS provides rich document style appearance, and the ability to set text and background properties; allows creating borders for any element, as well as the distance between the element's border and other elements, and the distance between the element's border and the element's content; allows the text to be changed at will Capitalization, trimming, and other page effects.
Easy to use and modify
CSS can define styles in the style attribute of HTML elements, or in the header section of HTML documents, or declare styles in a special CSS file for reference by HTML pages. In short, CSS style sheets can store all style declarations in a unified manner for unified management.
In addition, elements of the same style can be classified and defined using the same style, or a style can be applied to all HTML tags with the same name, or a CSS style can be assigned to a page element. If we want to modify the style, we only need to find the corresponding style declaration in the style list to modify.
CSS style sheets can be stored in a separate CSS file, so that we can use the same CSS style sheet in multiple pages. In theory, CSS style sheets do not belong to any page file and can be referenced in any page file. In this way, the style of multiple pages can be unified.
Simply put, cascading is to set the same style multiple times on an element, which will use the last set attribute value. For example, if the same set of CSS style sheets is used for multiple pages in a site, and some elements in some pages want to use other styles, a separate style sheet can be defined for these styles and applied to the pages. These later defined styles will override the previous style settings, and what you see in the browser will be the last style set.
In websites that use HTML to define page effects, a large number of or repeated tables and font elements are often required to form text styles of various specifications. The consequence of this is that a large number of HTML tags will be generated, thereby increasing the size of the page file. Putting the style declaration in the CSS style sheet alone can greatly reduce the size of the page, so that the time used when loading the page will also be greatly reduced. In addition, the reuse of CSS style sheets greatly reduces the size of the page and reduces the download time.