Vue interview questions

1. Vue Responsive Principle
   Reference: https://www.cnblogs.com/fundebug/p/responsive-vue.html
   Object.defineProperty implements
   Vue to monitor data changes by setting object property setter/getter methods, and collect dependencies through getters ,
   and each setter method is an observer, notifying subscribers to update the view when the data changes.

2. Vue's life cycle
   beforeCreate,created
   beforeMount,mounted
   beforeUpdate,updated
   activated,deactivated
   beforeDestory,destoryed
   activated: Execute when the page is redisplayed. Use keep-alive, localStorage and temporary variables to optimize page performance.
   deactivated: When the page is about to be hidden Or execute when replacing other pages. It can be used to unbind the global event bound on activated.
   mounted: It is the hook function after mounting the vue instance. The hook is executed once when the home page is mounted. If there is no cache, return to it again This function will also be executed on the home page.
   activated: It is the hook function after the component is activated, and it will be executed every time it returns to the page.

3. Vue $nextTick principle, event mechanism
   Reference: https://www.jianshu.com/p/a7550c0e164f

4. Component passing value
   Reference: https://juejin.cn/post/6844903845642911752
   var Event = new Vue()
   Event.$ emit(event name, data)
   Event.$ on(event name, data => { })

5. vuex
   reference: https://vuex.vuejs.org/zh/

6. Vue-router
   reference: https://rou