Resolve #3457244 "Fix js tests"

Closes #3457244

tests/src/FunctionalJavascript/FloatTest.php

@@ -235,7 +235,11 @@ class FloatTest extends WebDriverTestBase {
    *   Data about the element's location, including the X and Y position.
    */
   protected function getElementPosition(string $xpath): array {
-    return $this->getSession()->getDriver()->getWebDriverSession()->element('xpath', $xpath)->location();
+    return $this->getSession()
+      ->getDriver()
+      ->getWebDriverSession()
+      ->element('xpath', $xpath)
+      ->rect();
   }
 
 }