Add switchElementsAlt() to the default switches

Fixes #83.

lib/switches.js

@@ -15,6 +15,20 @@ module.exports = {
     this.onSwitch()
   },
 
+  switchElementsAlt: function(oldEl, newEl) {
+    oldEl.innerHTML = newEl.innerHTML
+
+    // Copy attributes from the new element to the old one
+    if (newEl.hasAttributes()) {
+      const attrs = newEl.attributes;
+      for (var i = 0; i < attrs.length; i++) {
+        oldEl.attributes.setNamedItem(attrs[i])
+      }
+    }
+
+    this.onSwitch()
+  },
+
   sideBySide: function(oldEl, newEl, options, switchOptions) {
     var forEach = Array.prototype.forEach
     var elsToRemove = []