1 files changed, 4 insertions, 7 deletions
diff --git a/js/url_search_params.ts b/js/url_search_params.ts
index 666ba6951..8e122191d 100644
--- a/js/url_search_params.ts
+++ b/js/url_search_params.ts
@@ -12,16 +12,11 @@ export class URLSearchParams {
       return;
     }
 
-    if (Array.isArray(init)) {
+    if (Array.isArray(init) || isIterable(init)) {
       this._handleArrayInitialization(init);
       return;
     }
 
-    if (isIterable(init)) {
-      this.params = [...init];
-      return;
-    }
-
     if (Object(init) !== init) {
       return;
     }
@@ -285,7 +280,9 @@ export class URLSearchParams {
     }
   }
 
-  private _handleArrayInitialization(init: string[][]): void {
+  private _handleArrayInitialization(
+    init: string[][] | Iterable<[string, string]>
+  ): void {
     // Overload: sequence<sequence<USVString>>
     for (const tuple of init) {
       // If pair does not contain exactly two items, then throw a TypeError.