Client Side

• Errors can be handled using try-catch block and the message can be shown using an alert or toast.

• If the server we are fetching data is configured properly for CORS (open for everyone) we can directly get data using fetch or axios.

• Performance wise we can use client side fetching to avoid page reloads (page reload causes all content to reload if browser caching is not configured)

• Not ideal for SEO.

• If not developed properly, client side code can become heavier and lead to performance issues.

Server Side

• Require full page reloads to display errors (In the context of Server side rendering PHP and Express)

• When SEO matters we should implement Server Side Rendering (SSR) as server side pages are crawlable by search engines.

• To get data we should implement proper pagination, limiting, searching, filtering and sorting features on our server.

• Data validation and santization can be done well on the server side.

Finally if user interactions is the project focus we must use Client Side and if SEO is a concern we must use Server Side. This information is the context of PHP and Node JS (Express).