After Ionic4 / Angular Web project packaged, deployed to the server, refresh access 404 Solution

ionic build --prod

Compile and publish content under www directory to IIS, access in the browser (http: //domain/index.html automatically jump to http: // domain / tabs / func ), then click on Browse refresh button at the top of the device 404 issues appeared, the solution is to use a hash routing, allowing access address becomes http: // domain / # / tabs / func, the specific implementation is to modify app.module.ts
1, in the first increase beginning position following code:

import { LocationStrategy, HashLocationStrategy } from '@angular/common';

2, modify @NgModule code, add the following:

@NgModule({
  providers: [
    { provide: LocationStrategy, useClass: HashLocationStrategy }
  ]
})