18 lines
454 B
TypeScript
18 lines
454 B
TypeScript
/** 单例模式
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* 确保一个类只有一个实例，并提供一个全局访问点
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* @param constructor
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* @constructor
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*/
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export function Singleton<T extends { new (...args: any[]): any }>(constructor: T): T {
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let instance: any;
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return new Proxy(constructor, {
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construct(target, argsList, newTarget) {
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if (!instance) {
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instance = Reflect.construct(target, argsList, newTarget);
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}
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return instance;
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},
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});
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}
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