54 lines
1.6 KiB
TypeScript
54 lines
1.6 KiB
TypeScript
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// (C) Copyright 2015 Moodle Pty Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* Registry to keep track of component instances.
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*/
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export class CoreComponentsRegistry {
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private static instances: WeakMap<Element, unknown> = new WeakMap();
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/**
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* Register a component instance.
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*
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* @param element Root element.
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* @param instance Component instance.
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*/
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static register(element: Element, instance: unknown): void {
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this.instances.set(element, instance);
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}
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/**
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* Resolve a component instance.
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*
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* @param element Root element.
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* @param componentClass Component class.
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* @returns Component instance.
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*/
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static resolve<T>(element?: Element | null, componentClass?: ComponentConstructor<T>): T | null {
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const instance = (element && this.instances.get(element) as T) ?? null;
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return instance && (!componentClass || instance instanceof componentClass)
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? instance
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: null;
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}
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}
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/**
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* Component constructor.
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*/
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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export type ComponentConstructor<T> = { new(...args: any[]): T };
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