TanStack
diff --git a/‎packages/table-core/src/core/headers/CreateHeader.ts‎
Lines changed: 54 additions & 0 deletions b/‎packages/table-core/src/core/headers/CreateHeader.ts‎
Lines changed: 54 additions & 0 deletions
@@ -0,0 +1,54 @@
+import { Column, Header, RowData, Table } from '../../types'
+import { Header_Core } from './Headers.types'
+
+export function _createHeader<TData extends RowData, TValue>(
+  table: Table<TData>,
+  column: Column<TData, TValue>,
+  options: {
+    id?: string
+    isPlaceholder?: boolean
+    placeholderId?: string
+    index: number
+    depth: number
+  }
+): Header<TData, TValue> {
+  const id = options.id ?? column.id
+
+  let header: Header_Core<TData, TValue> = {
+    id,
+    column,
+    index: options.index,
+    isPlaceholder: !!options.isPlaceholder,
+    placeholderId: options.placeholderId,
+    depth: options.depth,
+    subHeaders: [],
+    colSpan: 0,
+    rowSpan: 0,
+    headerGroup: null!,
+    getLeafHeaders: (): Header<TData, unknown>[] => {
+      const leafHeaders: Header<TData, unknown>[] = []
+
+      const recurseHeader = (h: Header_Core<TData, any>) => {
+        if (h.subHeaders && h.subHeaders.length) {
+          h.subHeaders.map(recurseHeader)
+        }
+        leafHeaders.push(h as Header<TData, unknown>)
+      }
+
+      recurseHeader(header)
+
+      return leafHeaders
+    },
+    getContext: () => ({
+      table,
+      header: header as Header<TData, TValue>,
+      column,
+    }),
+  }
+
+  table._features.forEach(feature => {
+    feature._createHeader?.(header as Header<TData, TValue>, table)
+  })
+
+  return header as Header<TData, TValue>
+}