protect from null href

Author: Soxasora

lib/url.js

@@ -92,10 +92,11 @@ export function parseYoutubeStart (t) {
 /**
  * check if it's an embed URL and if there's an available proxy for it
  * @param {string} href
- * @param {string} provider
+ * @param {string} [provider]
  * @returns {Object|null} if a proxy is available, returns an object with provider, service and href
  */
 export function proxyEmbedUrl (href, provider) {
+  if (!href) return null
   if (!provider) {
     provider = parseEmbedUrl(href)?.provider
   }