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23 lines
490 B
JavaScript
23 lines
490 B
JavaScript
//在组件销毁时应当删除订阅的事件，避免挂载多个事件
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class Bus {
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constructor() {
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this.callback = {}
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}
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on(name, val) {
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this.callback[name] = this.callback[name] || []
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this.callback[name].push(val)
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}
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async emit(name, args) {
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if (this.callback[name]) {
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return await Promise.all(this.callback[name].map(cb => cb(args)))
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}
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}
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off(name) {
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if (this.callback[name]) {
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delete this.callback[name]
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}
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}
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}
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export default Bus
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