up

2-ui/2-events/01-introduction-browser-events/03-which-handlers-run/task.md

@@ -0,0 +1,17 @@
+importance: 5
+
+---
+
+# Which handlers run?
+
+There's a button in the variable. There are no handlers on it.
+
+Which handlers run on click after the following code? Which alerts show up?
+
+```js no-beautify
+button.addEventListener("click", () => alert("1"));
+
+button.removeEventListener("click", () => alert("1"));
+
+button.onclick = () => alert(2);
+```