1 files changed, 16 insertions, 0 deletions
diff --git a/spec/frontend/helpers/wait_for_attribute_change.js b/spec/frontend/helpers/wait_for_attribute_change.js
new file mode 100644
index 00000000000..8f22d569222
--- /dev/null
+++ b/spec/frontend/helpers/wait_for_attribute_change.js
@@ -0,0 +1,16 @@
+export default (domElement, attributes, timeout = 1500) =>
+  new Promise((resolve, reject) => {
+    let observer;
+    const timeoutId = setTimeout(() => {
+      observer.disconnect();
+      reject(new Error(`Could not see an attribute update within ${timeout} ms`));
+    }, timeout);
+
+    observer = new MutationObserver(() => {
+      clearTimeout(timeoutId);
+      observer.disconnect();
+      resolve();
+    });
+
+    observer.observe(domElement, { attributes: true, attributeFilter: attributes });
+  });