Function insertForeignElement

lib/html/syntax.js:4870–4881

(
		/** @type {string} */ tagName,
		/** @type {number} */ ns,
		/** @type {HtmlAttribute[]} */ attributes,
		/** @type {TagPos | null} */ pos
	)

	};

	const insertForeignElement = (
		/** @type {string} */ tagName,
		/** @type {number} */ ns,
		/** @type {HtmlAttribute[]} */ attributes,
		/** @type {TagPos | null} */ pos
	) => {
		const el = mkEl(tagName, ns, attributes, pos);
		const place = appropriatePlace();
		insertAtPlace(place, el);
		open.push(el);
		return el;
	};

	// ---- scopes ----
	const isScopeBoundary = (/** @type {HtmlElement} */ el) => {