周年庆修改标题

src/components/activity/2020-717/index.js

-import React, { Component } from 'react';
-import { Switch, Route } from "react-router-dom";
+import React, {Component} from 'react';
+import {Switch, Route} from "react-router-dom";
 import Anniversary2020 from "@components/activity/2020-717/activity"
 import Question from "@components/activity/2020-717/question"
 import Invitation from "@components/activity/2020-717/invitation"
 
 
 class Anniversary2020Entry extends Component {
+
+  componentDidMount() {
+    document.title = '7.17 五周年庆，AI好课1分起购，答题、购课100%有奖！华为P40 Pro+，课程免单等你来！--七月在线'
+  }
+
+
   render() {
     const match = this.props.match
     return (