I have tried using the ngx-bootstrap, ng-bootstrap.

When I run application witn ng serve it works fine.

but when I run ***npm run build && node dist/server.js*** it give the error as

/@ng-bootstrap/ng-bootstrap/collapse/collapse.js:1
(function (exports, require, module, __filename, __dirname) { import { Directive, Input } from ‘[@angular/core](twitter.com/angular/core "Twitter profile for @angular/core")’;

AND

ngx-bootstrap/alert/index.js:1
(function (exports, require, module, __filename, __dirname) { export { AlertComponent } from ‘./alert.component’;