refactor(popover): rename ev to event?

fixes #15014

core/src/utils/overlays-interface.ts

@@ -0,0 +1,44 @@
+import { EventEmitter } from '@stencil/core';
+
+import { Animation, AnimationBuilder, Config, Mode } from '../interface';
+
+export interface OverlayEventDetail<T = any> {
+  data?: T;
+  role?: string;
+}
+
+export interface OverlayInterface {
+  mode: Mode;
+  el: HTMLElement;
+  willAnimate: boolean;
+  keyboardClose: boolean;
+  config: Config;
+  overlayId: number;
+  presented: boolean;
+  animation?: Animation;
+  animationCtrl: HTMLIonAnimationControllerElement;
+
+  enterAnimation?: AnimationBuilder;
+  leaveAnimation?: AnimationBuilder;
+
+  didPresent: EventEmitter<void>;
+  willPresent: EventEmitter<void>;
+  willDismiss: EventEmitter<OverlayEventDetail>;
+  didDismiss: EventEmitter<OverlayEventDetail>;
+
+  present(): Promise<void>;
+  dismiss(data?: any, role?: string): Promise<void>;
+}
+
+export interface OverlayController {
+  create(opts?: any): Promise<HTMLElement>;
+  dismiss(data?: any, role?: string, alertId?: number): Promise<void>;
+  getTop(): HTMLElement;
+}
+
+export interface HTMLIonOverlayElement extends HTMLStencilElement {
+  overlayId: number;
+  dismiss(data?: any, role?: string): Promise<void>;
+}
+
+export type OverlayMap = Map<number, HTMLIonOverlayElement>;