add is.urlSearchParams

test/test.ts

@@ -1642,6 +1642,27 @@ test('is.formData', t => {
 	});
 });
 
+test('is.urlSearchParams', t => {
+	const params = new window.URLSearchParams();
+	t.true(is.urlSearchParams(params));
+	t.false(is.urlSearchParams({}));
+	t.false(is.urlSearchParams(undefined));
+	t.false(is.urlSearchParams(null));
+
+	t.notThrows(() => {
+		assert.urlSearchParams(params);
+	});
+	t.throws(() => {
+		assert.urlSearchParams({});
+	});
+	t.throws(() => {
+		assert.urlSearchParams(undefined);
+	});
+	t.throws(() => {
+		assert.urlSearchParams(null);
+	});
+});
+
 test('assert', t => {
 	// Contrived test showing that TypeScript acknowledges the type assertion in `assert.number()`.
 	// Real--world usage includes asserting user input, but here we use a random number/string generator.