Why cascading style sheets

Some browsers let users modify the user-agent stylesheet. Although some constraints on user-agent stylesheets are set by the HTML specification, browsers still have a lot of latitude: that means that significant differences exist from one browser to another.

To simplify the development process, Web developers often use a CSS reset style sheet, forcing common properties values to a known state before beginning to make alterations to suit their specific needs.

Author stylesheets are the most common type of style sheet. These are style sheets that define styles as part of the design of a given web page or site. The author of the page defines the styles for the document using one or more stylesheets, which define the look and feel of the website — its theme. The user or reader of the web site can choose to override styles in many browsers using a custom user stylesheet designed to tailor the experience to the user's wishes.

The cascading algorithm determines how to find the value to apply for each property for each document element. After your content has finished altering styles, it may find itself in a situation where it needs to restore them to a known state. This may happen in cases of animations, theme changes, and so forth. Carlos Pandiella. Back What is CSS? Cascading Style Sheets Explained. Where to Go From Here? View All Posts by Carlos Pandiella.

Popular Nanodegrees. Programming for Data Science with Python. Data Scientist Nanodegree. Self-Driving Car Engineer. Data Analyst Nanodegree. Android Basics Nanodegree. Intro to Programming Nanodegree.

AI for Trading. Predictive Analytics for Business Nanodegree. AI For Business Leaders. School of Artificial Intelligence. School of Cyber Security.

School of Data Science. School of Business. School of Autonomous Systems. Get certified by completing a course today! If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. Margins Margin Collapse. Float Clear Float Examples. Navbar Vertical Navbar Horizontal Navbar. You can also define a generic class, that is, a class that is not limited to a single element.

For example:. Using external cascading style sheet rules and classes to format a report is described in Formatting a Report With an External Cascading Style Sheet. An external cascading style sheet, which is stored in a separate file that can be shared by multiple documents. The external CSS file can reside on any web server accessible to the browser.

You will find external cascading style sheets relevant if you: Develop reports, since you now have an improved way of formatting those reports.