fix: Dashboard crashes when adding Parse Pointer JSON to array field in data browser (parse-community#3125)

Author: mtrezza

src/components/BrowserCell/BrowserCell.react.js

@@ -134,16 +134,15 @@ export default class BrowserCell extends Component {
             />
           );
         });
-        this.copyableValue = content = (
-          <ul>
-            {array.map(a => (
-              <li key={a}>{a}</li>
+        content = (
+          <ul className={styles.pointerList}>
+            {array.map((a, i) => (
+              <li key={i}>{a}</li>
             ))}
           </ul>
         );
-        if (array.length > 1) {
-          classes.push(styles.hasMore);
-        }
+        // Set copyableValue to JSON string, not JSX (to avoid infinite render loop)
+        this.copyableValue = JSON.stringify(this.props.value);
       } else {
         this.copyableValue = content = JSON.stringify(this.props.value);
       }

src/components/BrowserCell/BrowserCell.scss

@@ -100,16 +100,39 @@
   background-color: #e3effd;
 }
 
-.hasMore {
-  height: auto;
-  max-height: 25px;
-  overflow-y: scroll;
-  padding-right: 3px;
+.pointerList {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  max-height: 20px;
+  overflow-y: auto;
+  overflow-x: hidden;
+
   & > li {
-    margin-bottom: 2px;
+    display: block;
+    line-height: 1.2;
+    flex-shrink: 0;
   }
 }
 
+.pointerList::-webkit-scrollbar {
+  -webkit-appearance: none!important;
+  width: 6px!important;
+}
+
+.pointerList::-webkit-scrollbar-thumb {
+  border-radius: 4px!important;
+  background-color: rgba(0, 0, 0, .5)!important;
+  box-shadow: 0 0 1px rgba(255, 255, 255, .5)!important;
+}
+
+.hasMore {
+  // No longer needed for pointer arrays, but kept for backwards compatibility
+}
+
 .removePadding {
   padding-right: 3px !important;
 }