Function appropriatePlace

lib/html/syntax.js:4734–4776

()

	// "appropriate place for inserting a node"
	const appropriatePlace = () => {
		const target = cur();
		if (
			fosterParenting &&
			TABLE_CONTEXT.has(target.tagName) &&
			target.namespace === NS_HTML
		) {
			// find last template / last table
			let lastTemplate = -1;
			let lastTable = -1;
			for (let i = open.length - 1; i >= 0; i--) {
				if (
					open[i].tagName === "template" &&
					open[i].namespace === NS_HTML &&
					lastTemplate === -1
				) {
					lastTemplate = i;
				}
				if (
					open[i].tagName === "table" &&
					open[i].namespace === NS_HTML &&
					lastTable === -1
				) {
					lastTable = i;
				}
			}
			if (
				lastTemplate !== -1 &&
				(lastTable === -1 || lastTemplate > lastTable)
			) {
				return placeAt(open[lastTemplate], null);
			}
			if (lastTable === -1) {
				return placeAt(open[0], null);
			}
			const table = open[lastTable];
			// find table's parent in tree
			const tp = findParent(table);
			if (tp) return placeAt(tp, table);
			return placeAt(open[lastTable - 1], null);
		}
		return placeAt(target, null);
	};

	const findParent = (/** @type {HtmlNode} */ node) => {
		// search the whole document tree for the parent of node