More independent.

src/js/lib/dom.js

@@ -49,3 +49,27 @@ exports.css = function (element, styleNameOrObject, styleValue) {
     }
   }
 };
+
+exports.matches = function (element, query) {
+  if (typeof element.matches !== 'undefined') {
+    return element.matches(query);
+  } else {
+    if (typeof element.matchesSelector !== 'undefined') {
+      return element.matchesSelector(query);
+    } else if (element.webkitMatchesSelector !== 'undefined') {
+      return element.webkitMatchesSelector(query);
+    } else if (element.mozMatchesSelector !== 'undefined') {
+      return element.mozMatchesSelector(query);
+    } else if (element.msMatchesSelector !== 'undefined') {
+      return element.msMatchesSelector(query);
+    }
+  }
+};
+
+exports.remove = function (element) {
+  if (typeof element.remove !== 'undefined') {
+    element.remove();
+  } else {
+    element.parentNode.removeChild(element);
+  }
+};

src/js/lib/helper.js

@@ -3,6 +3,8 @@
  */
 'use strict';
 
+var d = require('./dom');
+
 exports.toInt = function (x) {
   if (typeof x === 'string') {
     return parseInt(x, 10);
@@ -34,3 +36,10 @@ exports.extend = function (original, source) {
   }
   return result;
 };
+
+exports.isEditable = function (el) {
+  return d.matches(el, "input,[contenteditable]") ||
+         d.matches(el, "select,[contenteditable]") ||
+         d.matches(el, "textarea,[contenteditable]") ||
+         d.matches(el, "button,[contenteditable]");
+};