Function inButtonScope

lib/html/syntax.js:4925–4926

(/** @type {string} */ tagName)

	const inScope = (/** @type {string} */ tagName) =>
		hasNameInScope(tagName, SCOPE_DEFAULT);
	const inButtonScope = (/** @type {string} */ tagName) =>
		hasNameInScope(tagName, SCOPE_BUTTON);
	const inListItemScope = (/** @type {string} */ tagName) =>
		hasNameInScope(tagName, SCOPE_LIST_ITEM);
	const inScopeEl = (/** @type {HtmlElement} */ target) => {