[Pkg-javascript-commits] [sockjs-client] 365/434: #28 - Handle onunload / onbeforeunload more robustly.

[Tonnerre Lombard]

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tonnerre-guest pushed a commit to branch master
in repository sockjs-client.

commit 8e97a4e82911a1aa358ca090867f467948cf756c
Author: Marek Majkowski <majek04 at gmail.com>
Date:   Wed Mar 14 17:39:03 2012 +0000

    #28 - Handle onunload / onbeforeunload more robustly.
---
 lib/dom.js | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/lib/dom.js b/lib/dom.js
index 900590e..011d8d9 100644
--- a/lib/dom.js
+++ b/lib/dom.js
@@ -47,10 +47,32 @@ utils.detachEvent = function(event, listener) {
     }
 };
 
+
 var on_unload = {};
+// Things registered after beforeunload are to be called immediately.
+var after_unload = false;
+
+var trigger_unload_callbacks = function() {
+    for(var ref in on_unload) {
+        on_unload[ref]();
+        delete on_unload[ref];
+    };
+};
+// Onbeforeunload alone is not reliable.
+utils.attachEvent('beforeunload', function() {
+    after_unload = true;
+});
+utils.attachEvent('unload', function() {
+    after_unload = true;
+    trigger_unload_callbacks();
+});
+
 utils.unload_add = function(listener) {
     var ref = utils.random_string(8);
     on_unload[ref] = listener;
+    if (after_unload) {
+        utils.delay(trigger_unload_callbacks);
+    }
     return ref;
 };
 utils.unload_del = function(ref) {
@@ -58,11 +80,6 @@ utils.unload_del = function(ref) {
         delete on_unload[ref];
 };
 
-utils.attachEvent('unload', function() {
-    for(var k in on_unload) {
-        on_unload[k]();
-    };
-});
 
 utils.createIframe = function (iframe_url, error_callback) {
     var iframe = _document.createElement('iframe');

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