<image 
    v-if="item.isImage || (item.type && item.type === 'image')" 
    :src="item.thumb || `${prefix}${item.url}`
" :mode="imageMode" 
    class="uv-upload__wrap__preview__image" 
    @tap="onPreviewImage(item,index)" 
    :style="[{
    	width: $uv.addUnit(width),
    	height: $uv.addUnit(height)
    }]" 
/>