adding ability to disable a pfe-collapse-toggle button (#518)

Fixes #516

Author: kylebuch8

elements/pfe-collapse/demo/index.html

@@ -69,6 +69,16 @@ <h2>Standalone Toggle without a Panel</h2>
       Toggle without a panel
     </pfe-collapse-toggle>
 
+    <hr>
+
+    <h2>Disabled Toggle</h2>
+    <pfe-collapse>
+      <pfe-collapse-toggle disabled="disabled">Disabled Toggle</pfe-collapse-toggle>
+      <pfe-collapse-panel>
+        <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>
+      </pfe-collapse-panel>
+    </pfe-collapse>
+
     <script>
       var collapse = document.querySelector("pfe-collapse");
       var panel = collapse.querySelector("pfe-collapse-panel");

elements/pfe-collapse/src/pfe-collapse.js

@@ -108,6 +108,10 @@ class PfeCollapseToggle extends PFElement {
   }
 
   toggle() {
+    if (this.hasAttribute("disabled")) {
+      return;
+    }
+
     this.expanded = !this.expanded;
 
     if (this.controlledPanel) {

elements/pfe-collapse/test/pfe-collapse_test.html

@@ -36,6 +36,13 @@
       </pfe-collapse>
     </div>
 
+    <div id="disabled">
+      <pfe-collapse>
+        <pfe-collapse-toggle disabled="disabled">Toggle</pfe-collapse-toggle>
+        <pfe-collapse-panel>Panel</pfe-collapse-panel>
+      </pfe-collapse>
+    </div>
+
     <script>
       suite("<pfe-collapse>", () => {
         test("it should upgrade", () => {
@@ -241,6 +248,21 @@
             `pfe-collapse-toggle: This toggle doesn't have a panel associated with it`
           );
         });
+
+        test("it should not open the panel if the toggle has been disabled", done => {
+          const collapse = document.querySelector('#disabled pfe-collapse');
+          const toggle = collapse.querySelector('pfe-collapse-toggle');
+          const panel = collapse.querySelector("pfe-collapse-panel");
+
+          toggle.click();
+
+          flush(() => {
+            assert.equal(toggle.getAttribute("aria-expanded"), "false");
+            assert.isTrue(!panel.hasAttribute("pfe-expanded"));
+
+            done();
+          });
+        });
       });
     </script>
   </body>