大家好，我现在遇到一个跨域问题

我在页面上加了一个搜索框，然后旁边加了一个搜索的按钮，

点了按钮，就会调用后台接口，获取到数据，然后console.log(data);

前端项目端口是3000，后端项目是8081

大佬们，求助~

searchData() {
  let inputValue = document.getElementById("query_condition").value;
  console.log("你输入的查询条件是：" + inputValue);
  let activities = api.getActivities()();
  console.log(activities);
},

import request from './http';

export const baseUrl = 'http://localhost:8081';

const SUCCESS_CODE = 200;

export default {

  SUCCESS_CODE,

  getActivityInfo() {
    return request.requestGet(baseUrl + '/activity/info');
  },

  getActivities() {
    return request.requestGet(baseUrl + '/activity/list');
  },

  getChannels() {
    return request.requestGet(baseUrl + '/geek/channel/list');
  },

}