Q.   Different LWC Events. if a's child is b and b's child is c. how to communicate from c to a ? event communication from one application to other? Events in Lightning web components are built on  DOM Events , a collection of APIs and objects available in every browser. Lightning web components implement the  EventTarget  interface, which allows them to dispatch events, listen for events, and handle events.  Create a Event In LWC   Use CustomEvent Constructor  Pass any parameter/arguments in detail property.  Custom Event Name Should follow below rules No uppercase letters No spaces Use underscores to separate words        Syntax for Event  Creation :  const newCustomEventLWC = new CustomEvent('customeventname',  { detail :{                                              ...