Using CSS to style HTML pages allows us to separate structure from presentation. Separating structure from presentation reduces page loading times, improves search engine ranking, and increases a website's reach. It also ensures a website is more easily maintained, and will ultimately save you time and money.
The behavioural layer
Advantages of creating a behavioral layer are as follows:
- Debugging is simpler
Old web technologies
- Pop-up windows
- Disabling the right mouse button
- Disabling the back button
- Scrolling special effects
This was also compounded by the fact that cross-browser support was unreliable at best.
What is progressive enhancement?
Initially, as with all forms, validation rules must be applied server-side. If you rely on client-side validation and the client-side script is unavailable, you may:
- Receive poorly formatted data
- Receive unusable data
- Be exposed to security breaches