Introduction - If you have any usage issues, please Google them yourself
Function introduction:
1 upload and preview, the user can choose any area, to support the head rotation
2 whether the picture is too large or too small, can be displayed in accordance with the fixed size
3 to support the picture save
4 support Asp/php/Jsp/Asp.Net and other languages any call
5 compatibility is good, any browser is normal use