@tanstack/router-core/dist/esm/ssr/headers.js

Modern and scalable routing for React applications

import { splitSetCookieString } from "cookie-es";
//#region src/ssr/headers.ts
function toHeadersInstance(init) {
	if (init instanceof Headers) return init;
	else if (Array.isArray(init)) return new Headers(init);
	else if (typeof init === "object") return new Headers(init);
	else return null;
}
function mergeHeaders(...headers) {
	return headers.reduce((acc, header) => {
		const headersInstance = toHeadersInstance(header);
		if (!headersInstance) return acc;
		for (const [key, value] of headersInstance.entries()) if (key === "set-cookie") splitSetCookieString(value).forEach((cookie) => acc.append("set-cookie", cookie));
		else acc.set(key, value);
		return acc;
	}, new Headers());
}
//#endregion
export { mergeHeaders };

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