Ajax, jQuery and asynchronous programming
Here are some things I learned before but forgot, or forgot to learn before, or didn't learn at all, in short, I need to sort out. Of course, this is also the biggest connection between the three for me.
An understanding of this basic concept is essential. Unaccustomed to understanding at the beginning will lead to take some things for granted. Turns out it wasn't at all.
jQuery
jQuery is a JavaScript library.
Its main function is to select an element in html and perform some operations on it.
Ajax
AJAX (Asynchronous JavaScript and XML)
This technology is used to asynchronously load some content on a web page instead of refreshing the entire page.
First of all, we need to start with the XMLHttpRequest object, which we also refer to as XHR for short.