fix showBySelector behavior

Author: Graham Butler

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@author.io/element-cycle",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "author-cycle custom element (web component).",
   "main": "dist/author-cycle.min.js",
   "scripts": {

showroom/src/index.html

@@ -39,15 +39,19 @@ <h2 class="hidden">Navigation</h2>
         </author-control>
 
         <author-cycle>
-          <section selected>
+          <section class="first" selected>
             <h2>Section 1</h2>
 
             <p>
               Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
             </p>
+
+            <p class="test">
+              Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+            </p>
           </section>
 
-          <section>
+          <section class="second">
             <h2>Section 2</h2>
 
             <p>
@@ -59,7 +63,7 @@ <h2>Section 2</h2>
             </p>
           </section>
 
-          <section>
+          <section class="third">
             <h2>Section 3</h2>
 
             <p>

src/element.js

@@ -155,7 +155,7 @@ class AuthorCycleElement extends AuthorBaseElement(HTMLElement) {
       },
 
       showChildBySelector: query => {
-        let nodes = this.querySelectorAll(query)
+        let nodes = [...this.children].filter(child => child.matches(query))
 
         if (!nodes.length) {
           return this.UTIL.printToConsole(`Node matching query "${query}" not found. Aborting...`, 'warning')
@@ -164,8 +164,8 @@ class AuthorCycleElement extends AuthorBaseElement(HTMLElement) {
         if (nodes.length > 1) {
           this.UTIL.printToConsole(`Found multiple nodes matching "${query}". Displaying first result...`, 'warning')
         }
-
-        this.PRIVATE.showChild(nodes.item(0))
+        
+        this.PRIVATE.showChild(nodes[0])
       }
     })