如果Angular2遇到内部异常,它将不会记录到控制台.如何检测以下异常？
EXCEPTION: Error during instantiation of MainFormComponent!. ORIGINAL EXCEPTION: TypeError: Cannot set property 'crashMeMaybe' of undefined ORIGINAL STACKTRACE: ... stacktrace ... ERROR CONTEXT: ... context object ...
解决方法
有一个界面ExceptionHandler,您可以通过它提供您选择的自定义实现.见
here和
documentation.
来自BETA.0来源：(facade / exception_handler.d.ts)
/**
* Provides a hook for centralized exception handling.
*
* 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.
*
* ### Example
*
* ```javascript
*
* class MyExceptionHandler implements ExceptionHandler {
* call(error,stackTrace = null,reason = null) {
* // do something with the exception
* }
* }
*
* bootstrap(MyApp,[provide(ExceptionHandler,{useClass: MyExceptionHandler})])
*
* ```
*/
更新：
我对BETA.0有点问题
>进口必须被黑客入侵,
>界面似乎被内部细节污染了.
我运行它像：
import {ExceptionHandler} from 'angular2/src/facade/exception_handler';
export interface IExceptionHandler {
call(exception: any,stackTrace?: any,reason?: string): void;
}
export class CustomExceptionHandler implements IExceptionHandler {
call(exception: any,stackTrace: any,reason: string): void {
alert(exception);
}
}
bootstrap(DemoApp,[
new Provider(ExceptionHandler,{
useClass: CustomExceptionHandler
})
]);
