Issue/2170 (#2175)

* Consistency using requiredArguments method

Replaced tuple length check in Headers class with requiredArguments
method.

* Consistency using requiredArguments method

Replaced tuple length check in UrlSearchParams class with
requiredArguments method.

* fmt

2 files changed, 10 insertions, 10 deletions

diff --git a/js/headers.ts b/js/headers.ts
index 2f15f14da..e31c0903e 100644
--- a/js/headers.ts
+++ b/js/headers.ts
@@ -57,11 +57,11 @@ class HeadersBase {
           // If header does not contain exactly two items,
           // then throw a TypeError.
           // ref: https://fetch.spec.whatwg.org/#concept-headers-fill
-          if (tuple.length !== 2) {
-            throw new TypeError(
-              "Failed to construct 'Headers'; Each header pair must be an iterable [name, value] tuple"
-            );
-          }
+          requiredArguments(
+            "Headers.constructor tuple array argument",
+            tuple.length,
+            2
+          );
 
           const [name, value] = this._normalizeParams(tuple[0], tuple[1]);
           this._validateName(name);
diff --git a/js/url_search_params.ts b/js/url_search_params.ts
index ac4ac01b1..aef2f2c50 100644
--- a/js/url_search_params.ts
+++ b/js/url_search_params.ts
@@ -27,11 +27,11 @@ export class URLSearchParams {
       // Overload: sequence<sequence<USVString>>
       for (const tuple of init) {
         // If pair does not contain exactly two items, then throw a TypeError.
-        if (tuple.length !== 2) {
-          const errMsg =
-            "Each query pair must be an iterable [name, value] tuple";
-          throw new TypeError(errMsg);
-        }
+        requiredArguments(
+          "URLSearchParams.constructor tuple array argument",
+          tuple.length,
+          2
+        );
         this.append(tuple[0], tuple[1]);
       }
     } else if (Object(init) === init) {