🔧 set compatOptions on constructor

outlayer.js

@@ -137,12 +137,12 @@ proto.option = function( opts ) {
  * get backwards compatible option value, check old name
  */
 proto._getOption = function( option ) {
-  var oldOption = compatOptions[ option ];
+  var oldOption = this.constructor.compatOptions[ option ];
   return oldOption && this.options[ oldOption ] !== undefined ?
-    this.options[ oldOption ] !== undefined : this.options[ option ];
+    this.options[ oldOption ] : this.options[ option ];
 };
 
-var compatOptions = {
+Outlayer.compatOptions = {
   // currentName: oldName
   initLayout: 'isInitLayout',
   horizontal: 'isHorizontal',
@@ -850,10 +850,10 @@ Outlayer.data = function( elem ) {
 Outlayer.create = function( namespace, options ) {
   // sub-class Outlayer
   var Layout = subclass( Outlayer );
-
+  // apply new options and compatOptions
   Layout.defaults = utils.extend( {}, Outlayer.defaults );
-  // apply new options
   utils.extend( Layout.defaults, options );
+  Layout.compatOptions = utils.extend( {}, Outlayer.compatOptions  );
 
   Layout.namespace = namespace;
 
@@ -895,4 +895,3 @@ Outlayer.Item = Item;
 return Outlayer;
 
 }));
-

test/unit/create.js

@@ -2,8 +2,11 @@ QUnit.test( 'create Layouts', function( assert ) {
 
   var Leiout = Outlayer.create('leiout');
   Leiout.Item.prototype.foo = 'bar';
+  Leiout.compatOptions.fitWidth = 'isFitWidth';
   var elem = document.createElement('div');
-  var lei = new Leiout( elem );
+  var lei = new Leiout( elem, {
+    isFitWidth: 300
+  });
   var outlayr = new Outlayer( elem );
 
   assert.equal( typeof CellsByRow, 'function', 'CellsByRow is a function' );
@@ -15,6 +18,7 @@ QUnit.test( 'create Layouts', function( assert ) {
   assert.strictEqual( Outlayer.defaults.columnWidth, undefined, 'Outlayer has no default columnWidth' );
   assert.strictEqual( Leiout.defaults.columnWidth, undefined, 'Leiout has no default columnWidth' );
   assert.equal( lei.constructor.Item, Leiout.Item, 'Leiout.Item is on constructor.Item' );
+  assert.equal( lei._getOption('fitWidth'), 300, 'backwards compatible _getOption' );
   assert.equal( outlayr.constructor.Item, Outlayer.Item, 'outlayr.Item is still correct Item' );
 
 });