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 The role of props configuration in routing is to make it easier for routing components to receive parameters.It is very convenient to use. The following describes three ways to use props to pass and receive parameters.

 The parent component uses props to pass data (such as a method) to the child component, and the child component needs to use custom events to pass data back to the parent component! We can use v-on to bind custom events, and then pass them to subcomponents, which will call after receiving the method. Each Vue instance implements the Events interface, that is: use $on(eventName) to listen for events and $emit(eventName) to trigger events.

 The props property in Vue is used to pass values between components. Its main function and meaning is to receive data from the outside. It is equivalent to data and methods.When the attributes in the newly added mixins.js file conflict with the attributes in the component, such as the data attribute, methods attribute, etc., the attributes in the component shall prevail. If there is no conflict, the incoming props will be executed. But there are special ones: when there is a conflict between the lifecycle hook functions, the hooks passed in by props or in mixins.js are used first.