What is the difference between asynchronous and synchronous HTTP request?

Question

What is the difference between asynchronous and synchronous HTTP request?

Answer 1

Synchronous: A synchronous request blocks the client until operation completes. In such case, javascript engine of the browser is blocked.

Asynchronous An asynchronous request doesn’t block the client i.e. browser is responsive. At that time, user can perform another operations also. In such case, javascript engine of the browser is not blocked.