CODEWITHSUNDEEP
angularionic2
chikincrow
chikincrow

Reputation: 393

ionic 2 exception handling without freezing

How can I make my app resilient to exceptions.

Currently, each time there is an exception, the UI freezes and I have to restart the app.

Thanks.

Upvotes: 3

Views: 3289

Answers (2)

Luckylooke
Luckylooke

Reputation: 4539

UPDATE: Latest angular2, there is ErrorHandler not ExceptionHandler in angular core, which is now @angular/core not @angular2/core.

import { ErrorHandler } from '@angular/core';

export class MyExceptionHandler implements ErrorHandler {
  handleError(error) {
    // do something with the error
  }
}

Link to new angular class: https://angular.io/docs/ts/latest/api/core/index/ErrorHandler-class.html

Upvotes: 2

sebaferreras
sebaferreras

Reputation: 44659

You can use Angular 2 ExceptionHandler.

The default implementation of ExceptionHandler prints error messages to the Console. To intercept error handling, write a custom exception handler that replaces this default as appropriate for your app.

So you can create your own implementation of this class

class MyExceptionHandler implements ExceptionHandler {
  call(error, stackTrace = null, reason = null) {
    // do something with the exception
  }
}

And then, include it in your top-most component (the App component) like this:

import {ExceptionHandler,provide} from '@angular2/core';
import {MyExceptionHandler} from './folder/file-name';

@Component({
    providers: [provide(ExceptionHandler, {useClass: MyExceptionHandler})]
})
export class MyApp{...}

UPDATE

As of Ionic2 RC, in order to replace the ExceptionHandler for own custom implementation, we nee to include it in the NgModule like this:

@NgModule({
  providers: [{provide: ErrorHandler, useClass: MyExceptionHandler}]
})
class MyModule {}

Upvotes: 1

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