previewImage.md

upload/previewImage

fe.xiaowu

html5上传预览，目前只是文件Blob引用，后续考虑使用canvas来裁切并生成缩略图

use

require([
    'upload/previewImage'
], function (previewImage) {
    var url = previewImage.createObjectURL(fileObject);
});

example

结合upload/base上传模块的例子：upload/base#上传前预览