ionic-framework/src/util/ionic-error-handler.ts

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

/**
 * @name IonicErrorHandler
 * @description
 * The `IonicErrorHandler` intercepts the default `Console` error handling
 * and displays runtime errors as an overlay when using Ionic's Dev Build Server.
 *
 *
 * ### IonicErrorHandler Example
 *
 * ```typescript
 * import { NgModule, ErrorHandler } from '@angular/core';
 * import { IonicErrorHandler } from 'ionic-angular';
 *
 * @NgModule({
 *   providers: [{ provide: ErrorHandler, useClass: IonicErrorHandler }]
 * })
 * class AppModule {}
 * ```
 *
 *
 * ### Custom Error Handlers
 *
 * Custom error handlers can be built to replace the default, or extend Ionic's
 * error handler.
 *
 * ```typescript
 * class MyErrorHandler implements ErrorHandler {
 *   handleError(err: any): void {
 *     // do something with the error
 *   }
 * }
 *
 * @NgModule({
 *   providers: [{ provide: ErrorHandler, useClass: MyErrorHandler }]
 * })
 * class AppModule {}
 * ```
 *
 * More information about Angular's [`ErrorHandler`](https://angular.io/docs/ts/latest/api/core/index/ErrorHandler-class.html).
 */
export class IonicErrorHandler extends ErrorHandler {
  constructor() {
    super(false);
  }
  /**
   * @internal
   */
  handleError(err: any): void {
    super.handleError(err);
    try {
      const devServer = window['IonicDevServer'];
      if (devServer) {
        devServer.handleError(err);
      }
    } catch (e) {}
  }
}