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31 lines
578 B
TypeScript
31 lines
578 B
TypeScript
/**
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* 独立事件分发工具类
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*
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* @example
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* const event = new EventBus();
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* event.on(() => {
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* console.log('trigger')
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* })
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* event.fire();
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*/
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export class EventBus<Args extends unknown[] = []> {
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listeners: ((...args: Args) => void)[] = [];
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fire(...args: Args) {
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this.listeners.forEach((fn) => {
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fn(...args);
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});
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}
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on(fn: (...args: Args) => void) {
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this.listeners.push(fn);
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}
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off(fn: (...args: Args) => void) {
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const index = this.listeners.indexOf(fn);
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if (index >= 0) {
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this.listeners.splice(index, 1);
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}
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}
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}
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