Added codemirror refresh on details blog toggle

For #781

resources/js/components/page-display.js

@@ -12,6 +12,7 @@ class PageDisplay {
         Code.highlight();
         this.setupPointer();
         this.setupNavHighlighting();
+        this.setupDetailsCodeBlockRefresh();
 
         // Check the hash on load
         if (window.location.hash) {
@@ -196,6 +197,16 @@ class PageDisplay {
             });
         }
     }
+
+    setupDetailsCodeBlockRefresh() {
+        const onToggle = event => {
+            const codeMirrors = [...event.target.querySelectorAll('.CodeMirror')];
+            codeMirrors.forEach(cm => cm.CodeMirror && cm.CodeMirror.refresh());
+        };
+
+        const details = [...this.elem.querySelectorAll('details')];
+        details.forEach(detail => detail.addEventListener('toggle', onToggle));
+    }
 }
 
 export default PageDisplay;