Using CSS to style HTML pages allows us to separate structure (the content)
from presentation. Separating structure from presentation reduces page loading times, improves search engine ranking, and increases a websites' reach. It also ensures
a website is more easily maintained and will ultimately save you time and money.
degradation' have added a third layer, the behavioural layer.
The behavioural layer
Methods such as
Advantages of creating a behavioral layer are as follows:
- Debugging is simpler
and server-side scripting language.
images amongst other things.
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
Validating the form client side intercepts the form submission client-side and stops users from having to wait for the page to reload if it's been filled out incorrectly.