1.3.4 Client and server side processing

Question 1

Client-side processing:

Answer 1

Initial data validation (JavaScript)

Manipulates user interface elements

Applies website styles (CSS)

Reduces load on the server

Reduces the amount of web traffic

Question 2

Server-side processing

Answer 2

Provides further validation

Queries and updates the server database

Encodes data into readable HTML

Keeps organisation data secure

Performs complex calculations

Question 3

Positives of client-side processing

Answer 3

Web traffic is reduced and so less bandwidth is used.

Reduces the load on the server as it does not have to do the processing.

Helps ensure that data sent to the server passes validation rules.

Interactive widgets, such as a pop-up calendar assists the visitor to enter data correctly.

No delays in processing local data.

Question 4

Negatives of client-side processing

Answer 4

The browser must support Javascript (most do)

Javascript has to be enabled in order to run (some users and admins turn it off).

Page loading is slower as the Javascript script has to be loaded by the browser.

Search engines will find it difficult to index a JavaScript-heavy page, as much of the content is created as the page loads.

It needs technical skills to write JavaScript code from scratch, although there are plenty of JavaScript libraries such as JQuery available that reduce this burden.

Question 5

Positives of server-side processing

Answer 5

Faster load time

Easy indexation by search engines

Fewer issues with social media indexing

Better in terms of accessibility

Question 6

Negatives of server-side processing

Answer 6

Increase in expenses

May cause slower page rendering

Problems with compatibility

HTML with a larger size