Vue $ emit sub-component how to add custom parameters while receiving all parameters in the parent component

Preface

Often used$ EmitWhen the parameter transfer event is carried and custom parameters need to be used in the parent component, we cannot accept the parameters passed out by the Child component.
You have found two ways to add custom parameters at the same time.

Method 1

When a sub-component exports a single parameter:

// Sub-component this. $ emit ('test', this. Param) // parent component @ test = 'test ($ event, userdefined )'

Method 2

When multiple parameters are output from a child Widget:

// Sub-component this. $ emit ('test', this. param1, this. param2, this. param3) // The parent component arguments is passed in as an array @ test = 'test (arguments, userdefined )'

References

Https://github.com/vuejs/vue...

Original article address: 1190000016726750

Vue $ emit sub-component how to add custom parameters while receiving all parameters in the parent component