Advantages of Cascading Style Sheets

1. Consistency 

The main benefit of CSS is that style is applied consistently across a number of web pages. One command line can control several areas at one time, which is quite advantageous if there are changes that need to be made. You only need to alter one thing and the rest will follow. Because you don’t have to change each page one at a time, web designers can be very efficient in creating and changing a website with only a few lines of code.

2. Improved website speed 

Web designers only need to use a small amount of lines of programming for each page. And if there are less code, there are fewer lines to read, resulting in a faster load time for every page. With online users not willing to wait for a website to load, improving site speed will be most advantageous. Owners who bank on website performance to improve search engine rankings and customer base will benefit from CSS.

3. Easy to maintain 

Cascading style sheet not only simplifies website development, but also maintenance. All the codes are placed on one page, which means making improvements or changing a few lines will not involve going through several pages. And since a change with a single line of code is applied across the website, maintenance time and effort are significantly reduced.

4. CSS saves time

When most of us first learn HTML, we get taught to set the font face, size, colour, style etc every time it occurs on a page. This means we find ourselves typing (or copying & pasting) the same thing over and over again. With CSS, you only have to specify these details once for any element. CSS will automatically apply the specified styles whenever that element occurs.
Disadvantages of Cascading Style Sheets

1. Come in different levels 

There’s CSS, CSS 1 up to CSS3, which has resulted in confusion among developers and web browsers. One type of CSS should be enough. It would be preferable than having to choose which CSS level to use.

2. Fragmentation 

With CSS, what works with one browser may not always work with another. This is why web developers have to test for compatibility, running the program across multiple browsers before a website is set live. If only people use Mozilla or Chrome, but they don’t.

3. Lack of security 

Because it is an open text-based system, CSS doesn’t have the built-in security that will protect it from being overridden. Anyone who has a read/write access to a website can change the CSS file, alter the links or disrupt the formatting, whether by accident or design.

4. Browser compatibility 

Browsers have varying levels of compliance with Style Sheets. This means that some Style Sheet features are supported and some aren't. To confuse things more, some browser manufacturers decide to come up with their own proprietary tags. 


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