feat(lib): insource closest to support shadow dom

Closes #5

README.md

@@ -27,7 +27,7 @@ The library exposes the following tiny dom helpers:
 * `attr` - get and set node attributes
 * `classes` - class name helper
 * `clear` - remove children from a node
-* `closest` - get the closest parent by selector; [component-closest](https://github.com/component/closest)
+* `closest` - get the closest parent by selector;
 * `delegate` - event deletation support; [delegate-events](https://www.npmjs.com/package/delegate-events)
 * `domify` - html to elements; [domify](https://github.com/component/domify)
 * `event` - event binding; [component-event](https://github.com/component/event)

lib/closest.js

@@ -1,3 +1,24 @@
-export {
-  default
-} from 'closest';
+import matches from './matches';
+
+/**
+ * Closest
+ *
+ * @param {Element} el
+ * @param {String} selector
+ * @param {Boolean} checkYourSelf (optional)
+ */
+export default function(element, selector, checkYourSelf) {
+  var currentElem = checkYourSelf ? element : element.parentNode;
+
+  while (currentElem && currentElem.nodeType !== document.DOCUMENT_NODE &&
+      currentElem.nodeType !== document.DOCUMENT_FRAGMENT_NODE) {
+
+    if (matches(currentElem, selector)) {
+      return currentElem;
+    }
+
+    currentElem = currentElem.parentNode;
+  }
+
+  return matches(currentElem, selector) ? currentElem : null;
+}

package.json

@@ -33,7 +33,6 @@
   "license": "MIT",
   "sideEffects": false,
   "dependencies": {
-    "closest": "0.0.1",
     "component-event": "^0.1.4",
     "delegate-events": "^1.1.1",
     "domify": "^1.3.1",