feat: acknowledge the existence of popover and related attributes (#5357)

Author: wjhsf

packages/@lwc/shared/src/aria.ts

@@ -129,6 +129,7 @@ export const ID_REFERENCING_ATTRIBUTES_SET: Set<string> = /*@__PURE__*/ new Set(
     'aria-labelledby',
     'aria-owns',
     'for',
+    'popovertarget',
 ]);
 
 export { AriaAttrNameToPropNameMap, AriaPropNameToAttrNameMap };

packages/@lwc/shared/src/html-attributes.ts

@@ -80,6 +80,7 @@ const GLOBAL_ATTRIBUTE = /*@__PURE__*/ new Set([
     'lang',
     'nonce',
     'part',
+    'popover',
     'slot',
     'spellcheck',
     'style',

packages/@lwc/template-compiler/src/parser/utils/html-element-attributes.ts

@@ -54,6 +54,7 @@ const HTML_ELEMENT_ATTRIBUTE_MAP = {
         'itemtype',
         'lang',
         'nonce',
+        'popover',
         'slot',
         'spellcheck',
         'style',
@@ -118,6 +119,8 @@ const HTML_ELEMENT_ATTRIBUTE_MAP = {
         'formnovalidate',
         'formtarget',
         'name',
+        'popovertarget',
+        'popovertargetaction',
         'type',
         'value',
     ],