has been solved, and the production environment does not need  babel-loader  I don"t know when and who added this dependency in the production environment  
 an old project has not been maintained for a long time. 
 Today, after clone comes down,  npm install  and  cnpm install  both report an error 
 that there is no  [bable-loader@ ^ 1.0.1] Can"t find package bable-loader@ ^ 1.0.1  
