Method dispatch

packages/runtime-dom/src/apiCustomElement.ts:583–592

(event: string, args: any[])

        }

        const dispatch = (event: string, args: any[]) => {
          this.dispatchEvent(
            new CustomEvent(
              event,
              isPlainObject(args[0])
                ? extend({ detail: args }, args[0])
                : { detail: args },
            ),
          )
        }

        // intercept emit
        instance.emit = (event: string, ...args: any[]) => {