[new feature] Uploader: add name prop (#3096)

packages/uploader/en-US.md

@@ -29,7 +29,26 @@ export default {
 };
 ```
 
-#### Set input attr
+#### Name
+
+```html
+<van-uploader name="uploader" :after-read="onRead">
+  <van-icon name="photograph" />
+</van-uploader>
+```
+
+```javascript
+export default {
+  methods: {
+    onRead(file, detail) {
+      this.$toast(detail.name);
+    }
+  }
+};
+```
+
+#### Set input attrs
+
 You can set native properties such as `accpet`、`multiple` on Uploader, and the input will automatically inherits the attribute.
 
 ```html
@@ -42,6 +61,7 @@ You can set native properties such as `accpet`、`multiple` on Uploader, and the
 
 | Attribute | Description | Type | Default |
 |------|------|------|------|
+| name | Input name | `String` | - |
 | result-type | Type of file read result, can be set to `dataUrl` `text` | `String` | `dataUrl` |
 | accept | Accepted file type | `String` | `image/*` |
 | disabled | Whether to disabled the upload | `Boolean` | `false` |
@@ -61,9 +81,9 @@ You can set native properties such as `accpet`、`multiple` on Uploader, and the
 |------|------|
 | - | Custom icon |
 
-### afterRead Parematers
+### Parematers of before-read、after-read
 
 | Attribute | Description | Type |
 |------|------|------|
-| file | file object | `Object` |
-| content | file content | `String` |
+| file | File object | `Object` |
+| detail | Detail info | `Object` |