What you should know before learning jQuery ?
Before learning jquery you should know basics of :
- - HTML
- - CSS
What is jQuery ?
jQuery moto is write less , do more.
The jQuery library contains the following features:
- - HTML / DOM Manipulation
- - CSS Manipulation
- - HTML events methods
- - Effects and animations
- - AJAX
How to add jQuery in our web pages?
There are multiple ways by which we can link jQuery in our web page.
- You can download jQuery library from jQuery.com
- jQuery can also be added through the cdn,like Goolge or Microsoft
Two versions of jQuery are available for downloading
- Production version:This version is compressed and mostly used in live websites because it covers less space.
- Development version:This version is mostly used at testing or development phase it is unminified and readable.
All versions are available to download at jQuery offical site jQuery.com.
<head> <script src="jquery-3.4.1.min.js"></script> </head>
Note: You must place the jQuery library at the location to which src attribute is set.
You can also link jQuery library from CDN(Content Delievery Network).It would save you from downloading and hosting jQuery library.
Both Google and Microsoft have hosted the jQuery library you can use any link.
<head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script> </head>
<head> <script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.4.1.min.js"></script> </head>
Using CDN instead of self hosted jQuery file has some pros.
Mostly CDN is used for linking jQuery therfore, there is a wider chance that this file is stored in the cache memory of the viwer's browser. In this case your library will load speddily and increases the speed of your web page.
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