library package assembly vue broadcast $ dispatch $ broadcast

$ Dispatch and $ broadcast source code:

function Broadcast (componentName, eventName, the params) {
   the this . $ children.forEach (Child => { 
    const name = Child. options.name $
     // component name componentName consistent with the incoming 
    IF (name === componentName) {
       // eventName event trigger subassembly 
      child $ emit.apply (child, [eventName] .concat (the params)). 
    } the else { 
            broadcast.apply (child, [componentName, eventName] .concat ([the params])); // eslint- Line-disable 
    } 
  }) 
} 

Export default { 
  Methods: { 
    // trigger up event
    dispatch $ (componentName, eventName, params) {
       // get the parent instance 
      the let parent = the this . $ parent || the this . $ root
       // get the component name 
      the let name = parent. $ options.name
       // recursive lookups consistent with the componentName component name 
      the while (parent && (! name || name! == componentName)) { 
        parent = parent. $ parent 

        IF (parent) { 
          name = parent. $ options.name 
        } 
      } 
      IF (parent) {
         // component to trigger eventName event
        parent. $ emit.apply (parent, [eventName] .concat (the params)) 
      } 
    }, 
    // send event to the promoter (Sun) assembly 
    $ Broadcast (componentName, eventName, the params) { 
      broadcast.call ( the this , componentName, eventName , the params) 
    } 
  } 
}