How do you define a custom event in LWC?

Defining a custom event in Lightning Web Components (LWC) involves creating a new instance of a CustomEvent object using the new CustomEvent() constructor. This approach allows developers to create events with specific types and details that can carry additional information (payload) when the event is dispatched.

When you instantiate a CustomEvent, you can pass in two parameters: the event type (a string identifying the event) and an optional configuration object that can include details such as bubbles (whether the event bubbles up the DOM) and composed (whether it crosses the shadow DOM boundary). For example:

const myEvent = new CustomEvent('myevent', { detail: { key: 'value' }, bubbles: true });

This syntax enables developers to leverage the event system in LWC effectively, facilitating communication between components or between a component and the framework.

Other methods or options presented do not align with how custom events are intended to be defined or utilized within the LWC framework. For instance, using the createEvent() method is not valid in LWC, as it pertains to a different context (specifically in Aura components). Directly modifying the DOM also doesn't apply to LWC, which is designed to be a framework that enforces