[Doc] detailed Array typing

src/index-bar/README.md

@@ -62,7 +62,7 @@ export default {
 
 | Attribute | Description | Type | Default |
 |------|------|------|------|
-| index-list | Index List | `Array` | `A-Z` |
+| index-list | Index List | `string[] | number[]` | `A-Z` |
 | z-index | z-index | `number` | `1` |
 | sticky | Whether to enable anchor sticky top | `boolean` | `true` |
 | sticky-offset-top | Anchor offset top when sticky | `number` | `0` |