What’s CSS?

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CSS is a way to design websites with a consistent look and feel. It can be used inline, embedded, or externally to control the appearance of a single page, multiple pages, or an entire website. Changes made to external CSS affect the entire website.

Cascading Style Sheet (CSS) is a way of designing a website, or group of websites, so that they have a consistent look and feel that is easy to change. By using CSS to design a website, the web developer gains a greater degree of control over how the site looks.

A web developer can use a CSS file to control the look of a website in three main ways. The first way is called inline, referring to the fact that the code is placed directly into the code line of the website. For example, a web developer might want to make a particular sentence appear bold, in red, so that it stands out. It could use CSS to style that sentence bold and red using inline code. The advantage of this method is that it allows you to quickly and easily change a particular part of a web page.

Another way a web developer can use CSS is to create rules for a single web page. In this case, the developer will use what is called embedded CSS. For example, the developer can make each new paragraph indent and each heading bold. Embedded instructions are usually placed at the top of the web page code.

This allows the developer to change the embed code once and have the effects throughout the page. If he decided to italicize all headings instead of bold, he could simply change the style encoding and all headings on that page would change. This has an advantage over the online method as it covers the entire web page and changes can be made to the entire page at once.

The last common type of CSS is what is known as external CSS. A web developer will write code to apply to an entire group of web pages, an entire website, or even multiple websites. These rules can include things like background color, text color, word spacing, and other page layout elements, just like the previous two CSS examples.

The difference is that these instructions are not for a single section of the page, or just a web page, but for an entire website. The advantage is that the look and feel of an entire website can be changed at once by making changes to the external style sheet. If the designer wants to try out a new background color or font for the whole website, he can do it by changing a few lines in the external code, rather than going to each page individually and making changes there.
The disadvantages of both built-in and external CSS are that it takes more time to create a large style sheet, which will cover a large amount of layouts, than making smaller changes to individual lines. The web designer must decide whether it is more efficient in the long run to create individual inline instructions or to create an embedded or external CSS to take care of many design features at the same time.




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