- What is jQuery?
It’s a library that contains open source code and files, free to download and use, and is dual-licensed under the MIT and GPL licenses.
- How does it help us as developers?
for things like animations, Ajax requests, DOM manipulation, image effects, and user interface elements.
- Why do we have 2 version of jQuery - minified and uncompressed?
The uncompressed .js file is easy to read and modify, but it’s around 160kb in size (at the time of writing) which takes longer for user to load the page.
The minified .js file has all comments, whitespace, and other unnecessary characters removed from the file, squeezing the whole library into a mere 23kb. Although you can’t easily read the code, this is the version you’ll want to place on your site, as it’s much quicker for visitors to download.