Update README.md

Author: jeniffer9

README.md

@@ -31,6 +31,7 @@ Supported Options:
  * Support for Enum values via [`EnumType`](#query-with-enum-values)
  * Support for variables via [`__variables`](#query-with-variables)
  * Support for simple directives (such as `@client`) via [`__directives`](#query-with-directives)
+ * Support for inline fragments via [`__on`].[`__fragmentName`](#query-with-inline-fragments)
 
 ## Recent Changes
 
@@ -341,6 +342,38 @@ query {
 }
 ```
 
+### Query with Inline Fragments
+
+```typescript
+import { jsonToGraphQLQuery } from 'json-to-graphql-query';
+
+const query = {
+    query: {
+        Posts: {
+            __on: {
+                __fragmentName: "ConfigurablePost",
+                id: true
+            },
+            title: true
+        }
+    }
+};
+const graphql_query = jsonToGraphQLQuery(query, { pretty: true });
+```
+
+Resulting `graphql_query`
+
+```graphql
+query {
+    Posts {
+        ... on ConfigurablePost {
+            id
+        }
+        title
+    }
+}
+```
+
 ## TO-DO List
 
  * Support Named Queries / Mutations