Edge 13 needs a fixed template clone

Author: dfreedm

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 sudo: required
 dist: trusty
-node_js: 4
+node_js: stable
 addons:
   sauce_connect: true
   firefox: latest

src/Template/Template.js

@@ -33,16 +33,16 @@
     })();
   }
 
-  // returns true if nested templates can be cloned (they cannot be on
+  // returns true if nested templates cannot be cloned (they cannot be on
   // some impl's like Safari 8)
   var needsCloning = (function() {
     if (!needsTemplate) {
-      var frag = document.createDocumentFragment();
       var t = document.createElement('template');
-      frag.appendChild(t);
-      t.content.appendChild(document.createElement('div'));
-      var clone = frag.cloneNode(true);
-      return (clone.firstChild.content.childNodes.length === 0);
+      var t2 = document.createElement('template');
+      t2.content.appendChild(document.createElement('div'));
+      t.content.appendChild(t2);
+      var clone = t.cloneNode(true);
+      return (clone.content.childNodes.length === 0 || clone.content.firstChild.content.childNodes.length === 0);
     }
   })();
 

tests/Template/tests.html

@@ -130,7 +130,7 @@
           var imp = document.createElement('template');
           var s = 'a<template id="a">b<template id="b">c<template id="c">d</template></template></template>';
           setupTemplate(imp, s);
-          var clone = imp.cloneNode();
+          var clone = imp.cloneNode(false);
           assert.notEqual(clone, imp, 'element is not cloned');
           assert.isDefined(clone.content, 'cloned template content dne');
           assert.equal(clone.content.childNodes.length, 0,