release history
https://github.com/jquery/jquery/releases

https://en.wikipedia.org/wiki/JQuery#Release_history

Version
Release
Update
Size(KB)

1
2006/08
　
　

1.2
2007/09
1.2.6                     
54

1.5
2011/01
1.5.2                     
83

1.9
2013/01
1.9.1 (2013/02)     
90

1.12
2016/01
1.12.4 (2016/05)     
95

2
2013/04
2.0.3 (2013/07)      
81.1

2.1
2014/01
2.1.4 (2015/04)    
82.4

2.2
2016/01
2.2.4 (2016/05)      
83.5(251)

3
2016/06
3.0.0 (2016/06)      
86.3

3.1
2016/07
3.1.1 (2016/09)
86.3

3.2
2017/03
3.2.1 (2017/03)    
84.6

3.3
2018/01
3.3.1 (2018/01)  
84.8(265)(68.2)

3.4
2019/04 
3.4.1(2010/05)
86.1

3.5
2020/04 
3.5.1(2020/05) 
87.4(280)(70.6)

3.6
2021/03
 
87.4(70.6)

* jQuery v1.0 (2006/08)
    - IE 6 이상 지원

* jQuery v2.0 (2013/04)
    - IE 9 이상 지원
    - 크기 작아짐, 95k->83k

* jQuery 3.0  (2016/06)
https://blog.jquery.com/2014/10/29/jquery-3-0-the-next-generations/

https://blog.jquery.com/2016/06/09/jquery-3-0-final-released/

    - IE 8 이상 지원
    - HTML5 호환
    - Promises/A+ 호환
    - .load, .unload, and .error 가 사장되고 .on으로 대체
    - slim 버전 지원,        
        - 기능 제외 : ajax, effects, deprecated code
        - 크기 68.2k
            - 일반:84.8k(압축전 265k)

//========================
jQuery v3 으로 업그레이드 방법
jQuery Core 3.0 Upgrade Guide
https://jquery.com/upgrade-guide/3.0/

* jquery/jquery-migrate
https://github.com/jquery/jquery-migrate/#README
<script src="https://code.jquery.com/jquery-migrate-3.0.1.js"></script>

    - 수정 방법
https://github.com/jquery/jquery-migrate/blob/master/warnings.md

//==============
 jQuery Basics - [poiemaweb.com]
https://poiemaweb.com/jquery-basics