import type { IDisposable } from "@surface/core";
import type { Subscription } from "@surface/observer";
import type DirectiveContext from "../types/directive-context.js";
export default abstract class Directive implements IDisposable {
    protected readonly context: DirectiveContext;
    protected readonly subscription: Subscription;
    protected readonly keySubscription: Subscription;
    protected key: string;
    protected value: unknown;
    constructor(context: DirectiveContext);
    private keyNotify;
    private valueNotify;
    protected onAfterBind?(): void;
    protected onAfterUnbind?(): void;
    protected onBeforeBind?(): void;
    protected onBeforeUnbind?(): void;
    protected onKeyChange?(newKey: string, oldKey: string): void;
    protected onValueChange?(newValue: unknown, oldValue: unknown): void;
    dispose(): void;
}