renderChild() — astro Function Reference

Source Code

packages/astro/src/runtime/server/render/any.ts lines 8–70

export function renderChild(destination: RenderDestination, child: any): void | Promise<void> {
	if (isPromise(child)) {
		return child.then((x) => renderChild(destination, x));
	}

	if (child instanceof SlotString) {
		destination.write(child);
		return;
	}

	if (isHTMLString(child)) {
		destination.write(child);
		return;
	}

	if (Array.isArray(child)) {
		return renderArray(destination, child);
	}

	if (typeof child === 'function') {
		// Special: If a child is a function, call it automatically.
		// This lets you do {() => ...} without the extra boilerplate
		// of wrapping it in a function and calling it.
		return renderChild(destination, child());
	}

	if (!child && child !== 0) {
		// do nothing, safe to ignore falsey values.
		return;
	}

	if (typeof child === 'string') {
		destination.write(markHTMLString(escapeHTML(child)));
		return;
	}

	if (isRenderInstance(child)) {
		return child.render(destination);
	}

	if (isRenderTemplateResult(child)) {
		return child.render(destination);
	}

	if (isAstroComponentInstance(child)) {
		return child.render(destination);
	}

	if (ArrayBuffer.isView(child)) {
		destination.write(child);
		return;
	}

	if (typeof child === 'object' && (Symbol.asyncIterator in child || Symbol.iterator in child)) {
		if (Symbol.asyncIterator in child) {
			return renderAsyncIterable(destination, child);
		}

		return renderIterable(destination, child);
	}

	destination.write(child);
}