31 lines
658 B
JavaScript
31 lines
658 B
JavaScript
// 极简事件总线（避免引入额外依赖）
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const listeners = new Map()
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export function on(event, handler) {
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if (!event || typeof handler !== 'function') return
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const set = listeners.get(event) || new Set()
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set.add(handler)
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listeners.set(event, set)
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}
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export function off(event, handler) {
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const set = listeners.get(event)
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if (!set) return
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set.delete(handler)
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if (set.size === 0) listeners.delete(event)
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}
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export function emit(event, payload) {
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const set = listeners.get(event)
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if (!set || set.size === 0) return
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for (const fn of Array.from(set)) {
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try {
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fn(payload)
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} catch (e) {
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// ignore
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}
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}
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}
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