Angular2 bootstrap error: Error: No ExceptionHandler. Is platform module (BrowserModule) included?

Angular2 bootstrap error: Error: No ExceptionHandler. Is platform module (BrowserModule) included?

By : mcuyar
Date : November 21 2020, 11:01 PM
I wish did fix the issue. everybody for comments and help. The problem was that in other file I had dependency to 'q-io/fs' package. Removing that, angular started without any additional manipulations.
code :

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Module '"angular2/angular2"' has no exported member 'ExceptionHandler'

Module '"angular2/angular2"' has no exported member 'ExceptionHandler'

By : Abimannan
Date : March 29 2020, 07:55 AM
Does that help I think it's bug. ExceptionHandler must be exported here, but it's not.
For now for experimenting you can import ExceptionHandler like:
code :
import { ExceptionHandler } from 'angular2/src/core/facade/exceptions';
Angular2 ExceptionHandler - check if error object is Response

Angular2 ExceptionHandler - check if error object is Response

By : Aman
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Interesting question. Since TypeScript is really just compiling down to JS, classes don't really exist. I can think of two ways you could check, you can use a "User-Defined Type Guard" or use the "instanceof type guard". The User-Defined Type Guard is just a fancy way of checking a property/function of the object to determine its Type, the advantage is TS won't complain about a "missing property/function". Using the "instanceof" works but only if the Object has a constructor as it's comparing the two Object's constructors. So if your Object doesn't have a constructor it's a no go. You can find the documentation for these two here.
I also made a plunker demonstrating how they work. The results will load into the console, so use your browsers debug tool to see the results. All the work is being done on "app/child.component.ts" in the "ngOnChanges" function.
code :
ngOnChanges(changes: {[propertyName: string]: SimpleChange}) {
  console.log("Custom function isSimpleChange:", this.isSimpleChange(changes));
  console.log("Using instanceof SimpleChange:", (changes instanceof SimpleChange));
  console.log("Using Object.prototype.toString.call():", Object.prototype.toString.call(changes));
  console.log("Logging the object itself:",changes);
  let testExample = new ExampleObject();
  console.log("Custom function isExampleObject:", this.isExampleObject(testExample));
  console.log("Using instanceof ExampleObject:", (testExample instanceof ExampleObject));
  console.log("Using Object.prototype.toString.call():" + Object.prototype.toString.call(testExample));

  this._result = changes.value.currentValue;
Missing BrowserModule Error but Included in App Module

Missing BrowserModule Error but Included in App Module

By : Ryan
Date : March 29 2020, 07:55 AM
Hope that helps Why do you have two @ngModule decorator on one class
If you use two decorators on the same class, both will be applied to the class and store metadata on that class in reverse order, so that the first decorator properties stored in the last index. When the compiler resolves metadata it takes the last metadata properties using the findLast function, which essentially picks the first decorator properties in your file.
code :
exports: [
  imports: [

  declarations: [
  providers: [{
      provide: LocationStrategy,
      useClass: HashLocationStrategy

  bootstrap: [ AppComponent ]
Angular2 Error - Is platform module (BrowserModule) included?

Angular2 Error - Is platform module (BrowserModule) included?

By : Jack X
Date : March 29 2020, 07:55 AM
will be helpful for those in need I'm just trying to run a simple index.html page in Angular2, but its showing me an error in zone.js in console: , You are missing the
ERROR Error: Uncaught (in promise): Error: BrowserModule has already been loaded : angular 6

ERROR Error: Uncaught (in promise): Error: BrowserModule has already been loaded : angular 6

Date : March 29 2020, 07:55 AM
With these it helps I'm using multiple module with lazy loading concept but i'm getting given below error: , In app.module.ts
code :
Import {BrowserModule} from '@angular/platform-browser';
import { CommonModule } from '@angular/common';
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