@angular/core
Version:
Angular - the core framework
74 lines • 6.76 kB
JavaScript
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { getDebugContext, getErrorLogger, getOriginalError } from './errors';
/**
* Provides a hook for centralized exception handling.
*
* The default implementation of `ErrorHandler` prints error messages to the `console`. To
* intercept error handling, write a custom exception handler that replaces this default as
* appropriate for your app.
*
* @usageNotes
* ### Example
*
* ```
* class MyErrorHandler implements ErrorHandler {
* handleError(error) {
* // do something with the exception
* }
* }
*
* @NgModule({
* providers: [{provide: ErrorHandler, useClass: MyErrorHandler}]
* })
* class MyModule {}
* ```
*
* @publicApi
*/
var ErrorHandler = /** @class */ (function () {
function ErrorHandler() {
/**
* @internal
*/
this._console = console;
}
ErrorHandler.prototype.handleError = function (error) {
var originalError = this._findOriginalError(error);
var context = this._findContext(error);
// Note: Browser consoles show the place from where console.error was called.
// We can use this to give users additional information about the error.
var errorLogger = getErrorLogger(error);
errorLogger(this._console, "ERROR", error);
if (originalError) {
errorLogger(this._console, "ORIGINAL ERROR", originalError);
}
if (context) {
errorLogger(this._console, 'ERROR CONTEXT', context);
}
};
/** @internal */
ErrorHandler.prototype._findContext = function (error) {
if (error) {
return getDebugContext(error) ? getDebugContext(error) :
this._findContext(getOriginalError(error));
}
return null;
};
/** @internal */
ErrorHandler.prototype._findOriginalError = function (error) {
var e = getOriginalError(error);
while (e && getOriginalError(e)) {
e = getOriginalError(e);
}
return e;
};
return ErrorHandler;
}());
export { ErrorHandler };
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