vue neutron component updates parent component

When a change in some of the information in the sub-assembly and sub-assembly is closed, the parent needs to modify the contents of the updated components, how to operate

1, $ emit trigger

　　Parent component @ add = "add (val)"

　　Subassembly　　the this. $ EMIT ( 'the Add', newVal)

2, $ parent trigger

　　Component parent update data is triggered by a method, such as the getList ()

　　Subcomponents this. $ Parent.getList ()

 

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