Module not found: Error: Can't resolve './$$_ gendir/app/app. module. ngfactory'

brief introduction

Creating angular When the project is , Package generation dist The following error occurred in the file ：

ERROR in ./src/main.ts
Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory' in 'D:\web\task\src' @ ./src/main.ts 3:0-74 @ multi ./src/main.ts

Solution ：
hold ng build –prod Replace with ng build –env=prod, Then it will compile successfully .
reason ： This is not based on aot Based on ,ng build –env = prod： use environment.prod.ts Replace environment.ts, But it is a simple ng build.ng build –prod： Use aot + environment.prod.ts Replaced improved version （ Before , It is ng build –prod –aot）