feat(Uploader): add lazy-load prop (#6083)

src/uploader/README.md

@@ -161,6 +161,7 @@ export default {
 | disabled | Whether to disabled the upload | _boolean_ | `false` |
 | deletable `v2.2.12` | Whether to show delete icon | _boolean_ | `true` |
 | show-upload `v2.5.6` | Whether to show upload area | _boolean_ | `true` |
+| lazy-load `v2.6.2` | Whether to enable lazy load，should register [Lazyload](#/en-US/lazyload) component | _boolean_ | `false` |
 | capture | Capture，can be set to `camera` | _string_ | - |
 | after-read | Hook after reading the file | _Function_ | - |
 | before-read | Hook before reading the file, return false to stop reading the file, can return Promise | _Function_ | - |

src/uploader/README.zh-CN.md

@@ -183,6 +183,7 @@ export default {
 | disabled | 是否禁用文件上传 | _boolean_ | `false` |
 | deletable `v2.2.12` | 是否展示删除按钮 | _boolean_ | `true` |
 | show-upload `v2.5.6` | 是否展示上传区域 | _boolean_ | `true` |
+| lazy-load `v2.6.2` | 是否开启图片懒加载，须配合 [Lazyload](#/zh-CN/lazyload) 组件使用 | _boolean_ | `false` |
 | capture | 图片选取模式，可选值为`camera`(直接调起摄像头) | _string_ | - |
 | after-read | 文件读取完成后的回调函数 | _Function_ | - |
 | before-read | 文件读取前的回调函数，返回`false`可终止文件读取，<br>支持返回`Promise` | _Function_ | - |

src/uploader/index.js

@@ -24,6 +24,7 @@ export default createComponent({
 
   props: {
     disabled: Boolean,
+    lazyLoad: Boolean,
     uploadText: String,
     afterRead: Function,
     beforeRead: Function,
@@ -301,6 +302,7 @@ export default createComponent({
           class={bem('preview-image')}
           width={this.previewSize}
           height={this.previewSize}
+          lazyLoad={this.lazyLoad}
           onClick={() => {
             this.onPreviewImage(item);
           }}