vue2 详细-生命周期

最近在编写自己的组件库，所以需要对vue的生命周期非常的了解，顺便复习了一下知识点。

下面场景我们使用两个组件parent和child，parent包含child

众所周知，一个标准组件的执行顺序

graph TD
beforeCreate --> created --> beforeMount --> mounted --> beforeUpdate-->updated-->beforeDestroy-->destroyed

实例中parent，child两个父子组件的执行顺序如下？

parent --- beforeCreate
parent --- created
parent --- beforeMount
 child --- beforeCreate
 child --- created
 child --- beforeMount
 child --- mounted
parent --- mounted
parent --- beforeUpdate
 child --- beforeUpdate
 child --- updated
parent --- updated
parent --- beforeDestroy
 child --- beforeDestroy
 child --- destroyed
parent --- destroyed

1.0.0

1.parent何时能调用$child 如上parent --- beforeMount之后child才开始创建，所以在parent的mounted才能取$child 2.child何时能调用$parent 如上child --- beforeCreate开始时parent就已经执行到beforeMount，所以child在初始就可以调用$parent 3.如果我们在父子组件中所有钩子上都写上 this.$nextTick(() => { console.log() });他的执行顺序会是怎样

4.数据从parent注入child，变化时候钩子的调用情况