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2-ui/2-events/03-event-delegation/2-sliding-tree/task.md

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+importance: 5
+
+---
+
+# Tree menu
+
+Create a tree that shows/hides node children on click:
+
+[iframe border=1 src="solution"]
+
+Requirements:
+
+- Only one event handler (use delegation)
+- A click outside the node title (on an empty space) should not do anything.