feat(declarations): add popover attributes to JSX declarations (#5064)

* feat(declarations): add popover attributes

* align types with lib.dom.ts types

* add comment

Author: tanner-reits

src/declarations/stencil-public-runtime.ts

@@ -899,6 +899,11 @@ export namespace JSXBase {
     name?: string;
     type?: string;
     value?: string | string[] | number;
+
+    // popover
+    popoverTargetAction?: string;
+    popoverTargetElement?: Element | null;
+    popoverTarget?: string;
   }
 
   export interface CanvasHTMLAttributes<T> extends HTMLAttributes<T> {
@@ -1074,6 +1079,11 @@ export namespace JSXBase {
     webkitdirectory?: boolean;
     webkitEntries?: any;
     width?: number | string;
+
+    // popover
+    popoverTargetAction?: string;
+    popoverTargetElement?: Element | null;
+    popoverTarget?: string;
   }
 
   export interface KeygenHTMLAttributes<T> extends HTMLAttributes<T> {
@@ -1365,6 +1375,11 @@ export namespace JSXBase {
     tabIndex?: number;
     tabindex?: number | string;
     title?: string;
+    // These types don't allow you to use popover as a boolean attribute
+    // so you can't write HTML like `<div popover>` and get the default value.
+    // Developer must explicitly specify one of the valid popover values or it will fallback
+    // to `manual` (following the HTML spec).
+    popover?: string | null;
 
     // Unknown
     inputMode?: string;