What does web page cascading mean?

Web page cascading is a technology used to describe web page styles. It is a concept of cascading style sheets (CSS), which is used to control the appearance and layout of web pages. Through cascading style sheets, web designers can Apply style rules to different elements of the web page to beautify and customize the web page. The advantage of web page cascading is not only that it can improve the appearance and layout flexibility of the web page, but also that it can separate the style rules from the web page content. By placing the style rules in an external CSS file, web designers can achieve style control. Reuse and unified management.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Web page cascading (Cascading) is a technology used to describe the style of web pages. It is a concept of Cascading Style Sheets (CSS) used to control the appearance and layout of web pages. Through cascading style sheets, web designers can apply style rules to different elements of a web page to beautify and customize the web page.

The concept of web page cascading comes from the cascading nature of CSS. When multiple style rules are applied to the same element, the cascading style sheet will determine the final style performance according to certain priority rules. This cascading nature allows web designers to change the look and layout of an entire web page by simply modifying or adding style rules.

In web page cascading, the priority of style rules is determined by the specificity of the selector and the order of declaration. The specificity of a selector refers to the weight of the selector. The higher the weight, the higher the priority of the selector. For example, ID selectors are more specific than class selectors, and class selectors are more specific than tag selectors. When the specificity is the same, style rules declared later will override style rules declared earlier.

In addition to specificity and declaration order, web page cascading can also increase the priority of style rules by using the !important keyword. The !important keyword can set one style rule to have the highest priority, even if other rules have higher specificity or declaration order.

Through web page cascading, web designers can customize the style of each element of the web page. They can set properties such as the element's font, color, background, and borders, as well as properties such as the element's position, size, and layout. Through the reasonable use of cascading style sheets, web designers can achieve a variety of web page effects, from simple typography and color adjustments to complex animation and interactive effects.

The advantage of web page cascading is not only that it can improve the flexibility of the appearance and layout of web pages, but also that it can separate style rules from web page content. By placing style rules in an external CSS file, web designers can achieve reuse and unified management of styles. In this way, when you need to modify the style of the web page, you only need to modify the CSS file instead of modifying each element of the web page one by one.

In short, web page cascading is a technology used to describe web page styles. Through cascading style sheets, web designers can control the appearance and layout of web pages. By properly using cascading style sheets, web designers can achieve a variety of web page effects and improve the flexibility and maintainability of web pages

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