diff --git a/js/isotope.js b/js/isotope.js
index c48bffd..dc20fce 100644
--- a/js/isotope.js
+++ b/js/isotope.js
@@ -8,7 +8,7 @@
   'use strict';
   // universal module definition
 
-  if ( typeof define === 'function' && define.amd ) {
+  if ( typeof define == 'function' && define.amd ) {
     // AMD
     define( [
         'outlayer/outlayer',
@@ -25,7 +25,7 @@
       function( Outlayer, getSize, matchesSelector, utils, Item, LayoutMode ) {
         return factory( window, Outlayer, getSize, matchesSelector, utils, Item, LayoutMode );
       });
-  } else if ( typeof exports === 'object' ) {
+  } else if ( typeof exports == 'object' ) {
     // CommonJS
     module.exports = factory(
       window,
@@ -256,7 +256,7 @@ var getText = docElem.textContent ?
         return jQuery( item.element ).is( filter );
       };
     }
-    if ( typeof filter === 'function' ) {
+    if ( typeof filter == 'function' ) {
       // use filter as function
       return function( item ) {
         return filter( item.element );
@@ -323,7 +323,7 @@ var getText = docElem.textContent ?
     // `.foo-bar parseInt` will parse that as a number
     function mungeSorter( sorter ) {
       // if not a string, return function or whatever it is
-      if ( typeof sorter !== 'string' ) {
+      if ( typeof sorter != 'string' ) {
         return sorter;
       }
       // parse the sorter string
@@ -392,7 +392,7 @@ var getText = docElem.textContent ?
     var itemSorter = getItemSorter( sortBys, this.options.sortAscending );
     this.filteredItems.sort( itemSorter );
     // keep track of sortBy History
-    if ( sortByOpt !== this.sortHistory[0] ) {
+    if ( sortByOpt != this.sortHistory[0] ) {
       // add to front, oldest goes in last
       this.sortHistory.unshift( sortByOpt );
     }
diff --git a/js/item.js b/js/item.js
index 5a5cc90..40aa25c 100644
--- a/js/item.js
+++ b/js/item.js
@@ -5,13 +5,13 @@
 ( function( window, factory ) {
 'use strict';
   // universal module definition
-  if ( typeof define === 'function' && define.amd ) {
+  if ( typeof define == 'function' && define.amd ) {
     // AMD
     define( [
         'outlayer/outlayer'
       ],
       factory );
-  } else if ( typeof exports === 'object' ) {
+  } else if ( typeof exports == 'object' ) {
     // CommonJS
     module.exports = factory(
       require('outlayer')
diff --git a/js/layout-mode.js b/js/layout-mode.js
index 0d3d204..012583f 100644
--- a/js/layout-mode.js
+++ b/js/layout-mode.js
@@ -6,14 +6,14 @@
   'use strict';
   // universal module definition
 
-  if ( typeof define === 'function' && define.amd ) {
+  if ( typeof define == 'function' && define.amd ) {
     // AMD
     define( [
         'get-size/get-size',
         'outlayer/outlayer'
       ],
       factory );
-  } else if ( typeof exports === 'object' ) {
+  } else if ( typeof exports == 'object' ) {
     // CommonJS
     module.exports = factory(
       require('get-size'),
@@ -78,7 +78,7 @@
     // check that this.size and size are there
     // IE8 triggers resize on body size change, so they might not be
     var hasSizes = this.isotope.size && size;
-    return hasSizes && size.innerHeight !== this.isotope.size.innerHeight;
+    return hasSizes && size.innerHeight != this.isotope.size.innerHeight;
   };
 
   // ----- measurements ----- //
diff --git a/js/layout-modes/fit-rows.js b/js/layout-modes/fit-rows.js
index 446ea25..582d2c5 100644
--- a/js/layout-modes/fit-rows.js
+++ b/js/layout-modes/fit-rows.js
@@ -5,13 +5,13 @@
 ( function( window, factory ) {
   'use strict';
   // universal module definition
-  if ( typeof define === 'function' && define.amd ) {
+  if ( typeof define == 'function' && define.amd ) {
     // AMD
     define( [
         '../layout-mode'
       ],
       factory );
-  } else if ( typeof exports === 'object' ) {
+  } else if ( typeof exports == 'object' ) {
     // CommonJS
     module.exports = factory(
       require('../layout-mode')
diff --git a/js/layout-modes/masonry.js b/js/layout-modes/masonry.js
index 1a53a0d..5f72057 100644
--- a/js/layout-modes/masonry.js
+++ b/js/layout-modes/masonry.js
@@ -7,14 +7,14 @@
 ( function( window, factory ) {
   'use strict';
   // universal module definition
-  if ( typeof define === 'function' && define.amd ) {
+  if ( typeof define == 'function' && define.amd ) {
     // AMD
     define( [
         '../layout-mode',
         'masonry/masonry'
       ],
       factory );
-  } else if ( typeof exports === 'object' ) {
+  } else if ( typeof exports == 'object' ) {
     // CommonJS
     module.exports = factory(
       require('../layout-mode'),
diff --git a/js/layout-modes/vertical.js b/js/layout-modes/vertical.js
index d5595ee..35c425e 100644
--- a/js/layout-modes/vertical.js
+++ b/js/layout-modes/vertical.js
@@ -5,13 +5,13 @@
 ( function( window, factory ) {
   'use strict';
   // universal module definition
-  if ( typeof define === 'function' && define.amd ) {
+  if ( typeof define == 'function' && define.amd ) {
     // AMD
     define( [
         '../layout-mode'
       ],
       factory );
-  } else if ( typeof exports === 'object' ) {
+  } else if ( typeof exports == 'object' ) {
     // CommonJS
     module.exports = factory(
       require('../layout-mode')