Fix in SVG.Number

5 files changed, 18 insertions, 13 deletions

diff --git a/README.md b/README.md
index e183ca1..264f488 100755
--- a/README.md
+++ b/README.md
@@ -2987,7 +2987,7 @@ Change number to another unit:
 number.to('px')
 ```
 
-__`returns`: `itself`__
+__`returns`: `SVG.Number`__
 
 ### morph()
 Make a number morphable:
diff --git a/dist/svg.js b/dist/svg.js
index 088fc18..8aa70d3 100755
--- a/dist/svg.js
+++ b/dist/svg.js
@@ -6,7 +6,7 @@
 * @copyright Wout Fierens <wout@impinc.co.uk>
 * @license MIT
 *
-* BUILT: Wed Sep 03 2014 15:23:40 GMT+0200 (CEST)
+* BUILT: Wed Sep 03 2014 15:38:51 GMT+0200 (CEST)
 */;
 
 (function(root, factory) {
@@ -774,7 +774,7 @@ SVG.Number = SVG.invent({
 
     } else {
       if (value instanceof SVG.Number) {
-        this.value = value.value
+        this.value = value.valueOf()
         this.unit  = value.unit
       }
     }
@@ -814,10 +814,12 @@ SVG.Number = SVG.invent({
     }
     // Convert to different unit
   , to: function(unit) {
+      var number = new SVG.Number(this)
+      
       if (typeof unit === 'string')
-        this.unit = unit
+        number.unit = unit
 
-      return this
+      return number
     }
     // Make number morphable
   , morph: function(number) {
diff --git a/dist/svg.min.js b/dist/svg.min.js
index 033a538..89611a6 100755
--- a/dist/svg.min.js
+++ b/dist/svg.min.js
@@ -1,2 +1,2 @@
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diff --git a/spec/spec/number.js b/spec/spec/number.js
index 986338b..de00481 100755
--- a/spec/spec/number.js
+++ b/spec/spec/number.js
@@ -98,16 +98,17 @@ describe('Number', function() {
     beforeEach(function() {
       number = number.plus(4)
     })
-    it('returns itself', function() {
-      expect(number.to('em')).toBe(number)
+    it('returns a new instance', function() {
+      expect(number.to('em')).not.toBe(number)
+      expect(number.to('em') instanceof SVG.Number).toBeTruthy()
     })
     it('changes the unit value', function() {
-      number.to('%')
+      number = number.to('%')
       expect(number.unit).toBe('%')
     })
     it('changes the output value', function() {
       var oldNumber = number.valueOf()
-      number.to('%')
+      number = number.to('%')
       expect(number.toString()).toBe('400%')
     })
   })
diff --git a/src/number.js b/src/number.js
index ace511c..0ca8831 100755
--- a/src/number.js
+++ b/src/number.js
@@ -30,7 +30,7 @@ SVG.Number = SVG.invent({
 
     } else {
       if (value instanceof SVG.Number) {
-        this.value = value.value
+        this.value = value.valueOf()
         this.unit  = value.unit
       }
     }
@@ -70,10 +70,12 @@ SVG.Number = SVG.invent({
     }
     // Convert to different unit
   , to: function(unit) {
+      var number = new SVG.Number(this)
+      
       if (typeof unit === 'string')
-        this.unit = unit
+        number.unit = unit
 
-      return this
+      return number
     }
     // Make number morphable
   , morph: function(number) {