Value transfer between vue pure front-end components (between the pop-up window and the page)

I recently made a vue project template, and the parent-child components in it pass values. I have some insights and summarize it myself.

child's father

Use this. emitthis $emitthis.$ emit('function',param) param is a parameter.
This way, you can only look at one point. If it is a bit difficult to understand, you can look atthe
code
.
The function of connecting sub-components, when processing saveMes, just receive the data of the sub-components as an actual parameter

** father to son **

子组件使用props接收 接收时还可以设置默认值 当没获取到值时 会使用设置的默认值
同样 看代码会比较易懂一些
父组件

Subcomponent

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