Observed elements should only be pushed to the `CACHE` if on IE

[jwestbrook]

previous lighthouse ticket #1025 by ronin-93814 (at lighthouseapp)

---

All observed elements are being pushed to the CACHE array. This array is used only on IE to be able to clean up the event listeners in the _destroyCache method, which is called upon window.onunload. This patch puts an if (Prototype.Browser.IE) around the invocation of CACHE.push(element); to save some memory on other browsers.

This ticket is related to #466 (Suppress memory leaks from Element.remove and Elemen.update).

[jwestbrook]

ronin-93814 (at lighthouseapp) April 7th, 2010 @ 10:43 AM

From e795810fd997514b8e6ebd77972291308536f882 Mon Sep 17 00:00:00 2001
From: Jochen Berger <fooberger@googlemail.com>
Date: Wed, 7 Apr 2010 10:36:19 +0200
Subject: [PATCH] Only push observed elements to the CACHE if on IE

---
 src/dom/event.js |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/dom/event.js b/src/dom/event.js
index 6efac7d..1a18265 100644
--- a/src/dom/event.js
+++ b/src/dom/event.js
@@ -423,8 +423,10 @@
     var registry = Element.retrieve(element, 'prototype_event_registry');

     if (Object.isUndefined(registry)) {
-      // First time we've handled this element. Put it into the cache.
-      CACHE.push(element);
+      if (Prototype.Browser.IE) {
+        // First time we've handled this element. Put it into the cache.
+        CACHE.push(element);
+      }
       registry = Element.retrieve(element, 'prototype_event_registry', $H());
     }

-- 
1.6.3.3

[jwestbrook]

ronin-93814 (at lighthouseapp) April 13th, 2011 @ 10:54 AM

still an issue with prototype 1.7

[savetheclocktower]

We do this differently now.