几乎每一个网页是必备图片上传，图片裁剪功能，这里通过cropbox.js插件实现该功能。
<script src="https://www.jb51.net/js/jquery-1.11.1.min.js"></script> <script src="https://www.jb51.net/js/cropbox.js"></script> <script type="text/javascript"> $(window).load(function() { var options = { thumbBox: '.thumbBox', spinner: '.spinner', imgSrc: 'images/avatar.png' } var cropper = $('.imageBox').cropbox(options); $('#file').on('change', function(){ var reader = new FileReader(); reader.onload = function(e) { options.imgSrc = e.target.result; cropper = $('.imageBox').cropbox(options); } reader.readAsDataURL(this.files[0]); this.files = []; }) $('#btnCrop').on('click', function(){ var img = cropper.getDataURL(); $('.cropped').append('<img src="'https://www.jb51.net/article/+img+'">'); }) $('#btnZoomIn').on('click', function(){ cropper.zoomIn(); }) $('#btnZoomOut').on('click', function(){ cropper.zoomOut(); }) }); </script>