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ngx-error-boundary
Advanced tools
This library is an experimental implementation of React Error boundary for Angular.
npm i ngx-error-boundary --save
Import the module:
imports: [NgxErrorBoundaryModule];
Once you include the module, you will get following component that you can use:
<ErrorBoundary
[fallback]="template"
key="unique.identify.string"
></ErrorBoundary>
following directives:
errorRetry;
errorDismiss;
and also you got one service:
NgxErrorBoundaryService;
<ErrorBoundary>
Using [fallback]
with <ng-template></ng-template>
, key
is optional if there is only one ErrorBoundary
pre-component.
If there are multi ErrorBoundary
inside one component, you need to use key
to show correct error message
<!-- error: {message: string, key: string} -->
<!-- retry$: Observable<boolean>: is retrying -->
<ng-template #errTemplate let-error let-retry$="retry$">
<div class="err-container">
<h2>Something goes wrong!</h2>
<section>
<p [innerHTML]="error.message"></p>
<!-- errorRetry can help to retry the failed observable -->
<button errorRetry>
{{ (retry$ | async) ? "Retrying..." : "Retry" }}
</button>
<!-- errorDismiss: hide error boundary -->
<button [errorDismiss]="error.key">Dismiss</button>
</section>
</div>
</ng-template>
<ErrorBoundary [fallback]="errTemplate" key="example">
<YOUR_CONTENT_FROM_SERVER [data]="data$ | async" />
</ErrorBoundary>
this.data$ = timer(500).pipe(
this.apiService.fetchData(),
this.errorService.handleExpection({
message: "Cannot load data",
key: "example",
})
);
When there is error, <YOUR_CONTENT_FROM_SERVER [data]="data$ | async" />
will be repalced with errTemplate
.
@Input() fallback: TemplateRef
Take an ng-template
as input.
@Input() key: string
A string to unqiue identify string to show correct error message
errorRetry
DirectiveYou can retry the failed observable.
errorDismiss
DirectiveTake error's key string as input.
To hide Error boundary component
NgxErrorBoundaryService
handleExpection({message?: string, key?: string})
If nothing passed in as arguement, will use catched error's message information.
There is a default key assigned, can be used for global error message.
Example:
@Component({
selector: "categories",
...
providers: [NgxErrorBoundaryService],
})
export class CategoriesComponent {
categories$: Observable<Category[]>;
constructor(
private categoriesService: CategoriesService,
private errorService: NgxErrorBoundaryService
) {
this.categories$ = this.categoriesService.fetchData().pipe(
this.errorService.handleExpection({
message: "Cannot load categories",
key: "categories",
})
);
}
}
dismiss(key?: string)
key: error key
Hide error boundary component and error message for the key.
If didn't pass key, then hide all error messages.
FAQs
Angular 9 Component for React like Error boundary
We found that ngx-error-boundary demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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