From b72ab070b3996dc077fbeff2356b0fb237543d75 Mon Sep 17 00:00:00 2001
From: Jason Grout <jgrout6@bloomberg.net>
Date: Fri, 10 Feb 2017 16:25:34 -0500
Subject: [PATCH] Add a clearOutput code cell event

This is triggered when a code cell clears its output.
---
 notebook/static/notebook/js/codecell.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/notebook/static/notebook/js/codecell.js b/notebook/static/notebook/js/codecell.js
index 54781cf6f..20d217919 100644
--- a/notebook/static/notebook/js/codecell.js
+++ b/notebook/static/notebook/js/codecell.js
@@ -510,6 +510,7 @@ define([
     CodeCell.prototype.clear_output = function (wait) {
         this.output_area.clear_output(wait);
         this.set_input_prompt();
+        this.events.trigger('clearOutput.CodeCell', {cell: this});
     };