jquery+html5 implements the image upload and cropping function. You can preview the cropping effect and display the cropping box before uploading the image. It is implemented using jquery.Jcrop.min.js. In terms of compatibility, it is suitable for browsers: FireFox, Chrome, Opera. No Supports IE8, 360, Safari, Maxthon, Sogou, and Window of the World. This example is modified from a jquery html5 image cropping and uploading process on the Internet. The original code lacks the uploading part and only implements image preview and cropping.