From 882225c5cce8923ea599e296d8829401dcfe510d Mon Sep 17 00:00:00 2001
From: SG5 <sergeyv89@gmail.com>
Date: Tue, 29 Oct 2019 22:20:23 -0700
Subject: [PATCH] add beforeFormUnbind callback, fix #372

---
 README.md          | 9 +++++++++
 src/jquery.form.js | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/README.md b/README.md
index 1be69729..c975836f 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,15 @@ beforeSubmit: function(arr, $form, options) {
 }
 ````
 
+### beforeFormUnbind
+Callback function invoked before form events unbind and bind again. Provides an opportunity to manipulate the form before events will be remounted. The callback is invoked with two arguments: the jQuery wrapped form object and the options object.
+
+````javascript
+beforeFormUnbind: function($form, options) {
+    // your callback code
+}
+````
+
 ### filtering
 Callback function invoked before processing fields. This provides a way to filter elements.
 
diff --git a/src/jquery.form.js b/src/jquery.form.js
index a1d0a428..022f703c 100644
--- a/src/jquery.form.js
+++ b/src/jquery.form.js
@@ -1012,6 +1012,10 @@
 			return this;
 		}
 
+		if (options.beforeFormUnbind) {
+			options.beforeFormUnbind(this, options)
+		}
+
 		return this.ajaxFormUnbind()
 			.on('submit.form-plugin', options, doAjaxSubmit)
 			.on('click.form-plugin', options, captureSubmittingElement);