确认要离开当前页面，当前数据不可恢复

public/react/src/modules/user/usersInfo/video/VideoUploadList.js

@@ -1,5 +1,5 @@
 import React, { useState, useEffect, useReducer, useContext, memo } from 'react';
-
+import { Prompt } from 'react-router'
 import { getUrl2, isDev, CBreadcrumb, ActionBtn, ThemeContext } from 'educoder'
 import axios from 'axios'
 
@@ -233,6 +233,10 @@ function VideoUploadList (props) {
     const protocolLine = <div>上传视频，即表示您已同意<span style={{color: theme.foreground_select}}>上传内容协议</span>，不得上传未经他人授权的作品</div>
     return (
         <div className="educontent videoUploadList" style={{ marginBottom: '200px' }}>
+            <Prompt
+                when={state.videos.length}
+                message='确认要离开当前页面，当前数据不可恢复'
+            />
             <style>{`
                 .videoUploadList .section {
                     background: #fff;