angular2
Version:
Angular 2 - a web framework for modern web apps
64 lines • 5.66 kB
JavaScript
import { BaseException, WrappedException } from "angular2/src/facade/exceptions";
/**
* An error thrown if application changes model breaking the top-down data flow.
*
* This exception is only thrown in dev mode.
*
* <!-- TODO: Add a link once the dev mode option is configurable -->
*
* ### Example
*
* ```typescript
* @Component({
* selector: 'parent',
* template: `
* <child [prop]="parentProp"></child>
* `,
* directives: [forwardRef(() => Child)]
* })
* class Parent {
* parentProp = "init";
* }
*
* @Directive({selector: 'child', inputs: ['prop']})
* class Child {
* constructor(public parent: Parent) {}
*
* set prop(v) {
* // this updates the parent property, which is disallowed during change detection
* // this will result in ExpressionChangedAfterItHasBeenCheckedException
* this.parent.parentProp = "updated";
* }
* }
* ```
*/
export class ExpressionChangedAfterItHasBeenCheckedException extends BaseException {
constructor(oldValue, currValue, context) {
super(`Expression has changed after it was checked. ` +
`Previous value: '${oldValue}'. Current value: '${currValue}'`);
}
}
/**
* Thrown when an exception was raised during view creation, change detection or destruction.
*
* This error wraps the original exception to attach additional contextual information that can
* be useful for debugging.
*/
export class ViewWrappedException extends WrappedException {
constructor(originalException, originalStack, context) {
super(`Error in ${context.source}`, originalException, originalStack, context);
}
}
/**
* Thrown when a destroyed view is used.
*
* This error indicates a bug in the framework.
*
* This is an internal Angular error.
*/
export class ViewDestroyedException extends BaseException {
constructor(details) {
super(`Attempt to use a destroyed view: ${details}`);
}
}
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