study_express/10-upload/webpack.config.js

/*
 * @Author: Johnhong9527
 * @Date:   2019-06-04 17:12:20
 * @Last Modified by:   Johnhong9527
 * @Last Modified time: 2019-06-05 10:18:31
 */
module.exports = {
  mode: 'development',
  //...
  watchOptions: {
    poll: 1000 // Check for changes every second
  }
};