vue eventBus 路由跳转重复注册问题
设置eventbus后在监听事件后跳转路由，第一次跳转不触发事件，以后每次跳转都会递增触发，请问怎么解决？
比如在a组件$emit后，跳转到b组件，在b组件中用$on监听a组件的事件，但是第一次点击跳转后不触发，以后每次都会递增，第二次点击触发一次，第三次点击触发两次这样。
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