sibling() — svelte Function Reference

Source Code

packages/svelte/src/internal/client/dom/operations.js lines 173–208

export function sibling(node, count = 1, is_text = false) {
	let next_sibling = hydrating ? hydrate_node : node;
	var last_sibling;

	while (count--) {
		last_sibling = next_sibling;
		next_sibling = /** @type {TemplateNode} */ (get_next_sibling(next_sibling));
	}

	if (!hydrating) {
		return next_sibling;
	}

	if (is_text) {
		// if a sibling {expression} is empty during SSR, there might be no
		// text node to hydrate — we must therefore create one
		if (next_sibling?.nodeType !== TEXT_NODE) {
			var text = create_text();
			// If the next sibling is `null` and we're handling text then it's because
			// the SSR content was empty for the text, so we need to generate a new text
			// node and insert it after the last sibling
			if (next_sibling === null) {
				last_sibling?.after(text);
			} else {
				next_sibling.before(text);
			}
			set_hydrate_node(text);
			return text;
		}

		merge_text_nodes(/** @type {Text} */ (next_sibling));
	}

	set_hydrate_node(next_sibling);
	return next_sibling;
}