Intro to jQuery: What Is jQuery & How To Add It? (Study Note)

What is jQuery?

According to the web develop course, jQuery is a DOM manipulation library. It helps us do things like:

select element
manipulate element
create element
add event listeners
animate elements
add effect
make HTTP Request

The point of jQuery is to help us do things faster and easier.

Why use jQuery?

fixes "broken" DOM API
brevity and clarity
ease of use
cross-browser support
AJAX
lot's of people use jQuery

How to add jQuery?

One way to add jQuery is to download jQuery link to it locally.

Step One: Download the jQuery file

We need to go to jQuery.com and select "Download" page. Then, we can download the most recent jQuery copy and save it in the same file with your HTML file.

Step Two: Add the jQuery to the HTML page

Open the HTML page, and add the src of your saved jQuery file name in the script tag.

Step Three: Check if it is install correctly

Open your page console, and type jQuery, if it doesn't show any red error, it means you install the jQuery correctly.

The other way to add jQuery is to link a CDN (a host copy). You can search "jQuery CDN" keyword on Google, and find the right link, then add the link address to the script src.

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