From 78779c258d12afd01f063aced5832148239cf0ba Mon Sep 17 00:00:00 2001
From: Hasan Kumar Reddy A <hasan@rocketbox.in>
Date: Sat, 20 Feb 2016 11:12:07 +0530
Subject: [PATCH] Make markup changes idempotent

(on a ruby on rails application with turbolinks)
When I press browser back and forward, the initialization code runs again creating double elements
---
 scripts/material.js | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/scripts/material.js b/scripts/material.js
index 7b8e7466..a66f1ee0 100644
--- a/scripts/material.js
+++ b/scripts/material.js
@@ -82,8 +82,9 @@
       // Add fake-checkbox to material checkboxes
       var $input = $((selector) ? selector : this.options.checkboxElements)
         .filter(":notmdproc")
-        .data("mdproc", true)
-        .after("<span class='checkbox-material'><span class='check'></span></span>");
+        .data("mdproc", true);
+      if ($input.siblings(".checkbox-material").length == 0)
+        $input.after("<span class='checkbox-material'><span class='check'></span></span>");
 
       _toggleTypeFocus($input);
     },
@@ -91,8 +92,9 @@
       // Add fake-checkbox to material checkboxes
       var $input = $((selector) ? selector : this.options.togglebuttonElements)
         .filter(":notmdproc")
-        .data("mdproc", true)
-        .after("<span class='toggle'></span>");
+        .data("mdproc", true);
+      if ($input.siblings(".toggle").length == 0)
+        $input.after("<span class='toggle'></span>");
 
       _toggleTypeFocus($input);
     },
@@ -100,8 +102,9 @@
       // Add fake-radio to material radios
       var $input = $((selector) ? selector : this.options.radioElements)
         .filter(":notmdproc")
-        .data("mdproc", true)
-        .after("<span class='circle'></span><span class='check'></span>");
+        .data("mdproc", true);
+      if ($input.siblings(".circle").length == 0)
+        $input.after("<span class='circle'></span><span class='check'></span>");
 
       _toggleTypeFocus($input);
     },
@@ -156,7 +159,8 @@
           }
 
           // Add at the end of the form-group
-          $formGroup.append("<span class='material-input'></span>");
+          if ($formGroup.siblings(".material-input").length == 0)
+            $formGroup.append("<span class='material-input'></span>");
 
           // Support for file input
           if ($formGroup.find("input[type=file]").length > 0) {