implement pinch to zoom

node_modules/transition-property/Readme.md

@@ -0,0 +1,12 @@
+# transition-property
+
+## Install
+
+    npm i transition-property -S
+
+## Usage
+
+``` js
+var transitionProperty = require('transition-property')
+el.style[transitionProperty] = '100ms -webkit-transform linear'
+```