这一版本优化了很多

node_modules/wot-design-uni/components/composables/useCell.ts

@@ -0,0 +1,13 @@
+import { computed } from 'vue'
+import { useParent } from './useParent'
+import { CELL_GROUP_KEY } from '../wd-cell-group/types'
+
+export function useCell() {
+  const { parent: cellGroup, index } = useParent(CELL_GROUP_KEY)
+
+  const border = computed(() => {
+    return cellGroup && cellGroup.props.border && index.value
+  })
+
+  return { border }
+}