1 files changed, 14 insertions, 0 deletions
diff --git a/dom/base/test/chrome/custom_element_ep.js b/dom/base/test/chrome/custom_element_ep.js
new file mode 100644
index 0000000000..d933ecbbab
--- /dev/null
+++ b/dom/base/test/chrome/custom_element_ep.js
@@ -0,0 +1,14 @@
+/* globals finishTest */
+class XFoo extends HTMLElement {
+  constructor() {
+    super();
+    this.magicNumber = 42;
+  }
+
+  connectedCallback() {
+    finishTest(this.magicNumber === 42);
+  }
+}
+customElements.define("x-foo", XFoo);
+
+document.firstChild.appendChild(document.createElement("x-foo"));