WIP: optimize resize performance

packages/base/data/list-table-v2.vue

@@ -121,6 +121,7 @@ const miniTableData = ref<any[]>([]);
 const estimatedRowHeight = ref<number | undefined>(undefined);
 const estimatedHeaderHeight = ref<number | undefined>(undefined);
 let miniTableResizeObserver: ResizeObserver | null = null;
+let lastMiniTableHeight = 0;
 
 // Header height constant
 
@@ -170,6 +171,7 @@ interface Props {
   columns?: ListTableColumn<T>[];
   page?: boolean;
   height?: number | string;
+  minHeight?: number | string;
   maxHeight?: number | string;
   example?: any;
   rowKey?: string;
@@ -189,6 +191,7 @@ const prop = withDefaults(defineProps<Props>(), {
   columns: () => [],
   page: false,
   height: undefined,
+  minHeight: 300,
   maxHeight: undefined,
   example: () => ({}),
   rowKey: "id",
@@ -261,6 +264,8 @@ watch(
     if (rowHeight && rowHeight > 0) {
       estimatedRowHeight.value = rowHeight;
     }
+    // Update last known mini-table height for ResizeObserver comparison
+    lastMiniTableHeight = miniTableRef.value?.offsetHeight || 0;
   },
   { immediate: true }
 );
@@ -276,13 +281,23 @@ function estimateTableRowHeight() {
   return { headerHeight, rowHeight };
 }
 
-// Setup ResizeObserver on mount (not window resize - that causes flickering)
+// Setup ResizeObserver on mount
+// Observe miniTableRef instead of myTableRef - only re-probe if mini-table's rendered height changes
+// This avoids unnecessary re-probing during window resize when container width changes but row heights stay same
 onMounted(() => {
-  // Resize handler - measure first, then clear and set in same microtask
+  // Resize handler - only re-probe if the mini-table's actual height changed
   const handleResize = lodash.debounce(async () => {
     if (!shouldUseProbeRow.value || miniTableData.value.length === 0) {
       return;
     }
+
+    // Check if mini-table height actually changed (e.g., due to text wrapping)
+    const currentHeight = miniTableRef.value?.offsetHeight || 0;
+    if (currentHeight === lastMiniTableHeight) {
+      return; // Height unchanged, no need to re-probe
+    }
+    lastMiniTableHeight = currentHeight;
+
     await nextTick();
     await new Promise((resolve) => requestAnimationFrame(resolve));
     await new Promise((resolve) => requestAnimationFrame(resolve));
@@ -300,16 +315,17 @@ onMounted(() => {
       estimatedRowHeight.value = newRow;
       estimatedHeaderHeight.value = newHeader;
     });
-  }, 50);
+  }, 200);
 
-  // Use ResizeObserver on .my-table to detect width changes
-  // This is better than window resize because it only fires when OUR container changes
+  // Observe miniTableRef for height changes
+  // The mini-table's height only changes when column widths cause text to wrap
+  // During typical window resize with fixed-height content, height stays same → no re-probe
   miniTableResizeObserver = new ResizeObserver(() => {
     handleResize();
   });
 
-  if (myTableRef.value) {
-    miniTableResizeObserver.observe(myTableRef.value);
+  if (miniTableRef.value) {
+    miniTableResizeObserver.observe(miniTableRef.value);
   }
 });
 
@@ -480,7 +496,7 @@ const tableColumns = computed(() => {
     col.cellRenderer = renderCellContent;
 
     // Header cell renderer - use custom headerCellRenderer if provided
-    col.headerCellRenderer = undefined; // TODO
+    col.headerCellRenderer = renderHeaderCellContent;
 
     col._listTableColumn = column;
     return col;