implement pinch to zoom

node_modules/component-delegate/Readme.md

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+
+# delegate
+
+  Low-level event delegation component.
+
+## Installation
+
+    $ component install component/delegate
+
+## Example
+
+```js
+var delegate = require('delegate');
+var ul = document.querySelector('ul');
+var n = 0;
+
+var fn = delegate.bind(ul, 'li a', 'click', function(e){
+  console.log(e.target);
+  console.log(e.delegateTarget); // => "<a>"
+  if (++n == 3) {
+    console.log('unbind');
+    delegate.unbind(ul, 'click', fn, false);
+  }
+}, false);
+```
+
+## API
+
+### .bind(el, selector, type, callback, [capture])
+
+  Bind and return a callback which may be passed to `.unbind()`.
+
+### .unbind(el, type, callback, [capture])
+
+  Unbind.
+
+## License
+
+  MIT