function uploadImages(picker, url, callback) {  var img_uploader = WebUploader.create({    auto: true,    server: url,    pick: picker,    fileNumLimit: 1,    fileSingleSizeLimit: 2097152, // 2M    accept: {      title: 'Images',      extensions: 'gif,jpg,jpeg,bmp,png',      // mimeTypes: 'image/*'    },    compress: {      width: 300,      compressSize: 102400 // < 100kb 不壓縮    },  })  var fileType = ['image/jpeg', 'image/jpg', 'image/gif', 'image/png', 'image/bmp']  img_uploader.on('beforeFileQueued', function(file) {    fileType.some(function(name) {      return file.type === name    })    ? '' : alert('請上傳正確的圖片！')  })  img_uploader.on('uploadSuccess', function(file, res) {    callback(file, res)  })  img_uploader.on('uploadError', function(file, reason) {    console.log(reason);  })  img_uploader.on('uploadComplete', function(file) {    img_uploader.reset()  })}

<div id="zTu">圖片</div>

var coverImage; initImageUploader();function initImageUploader(){  var fileUrl = 你想上傳的地址;  uploadImages('#imagePicker', fileUrl, function(file, res) {   coverImage = res.url   $('#zTu').get(0).innerHTML = '<div class="file-item thumbnail"><img style="max-height:180px" src="' + res.url + '" /></div>'  }) }