# Amazon AppSync resolver reference (JavaScript)
<a name="resolver-reference-js-version"></a>

The following sections contain the `APPSYNC_JS` runtime and JavaScript resolver reference:
+  [ JavaScript resolvers overview ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-reference-overview-js.html) - Learn more about how resolvers work in Amazon AppSync.
+  [ Resolver context object reference ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-context-reference-js.html) - Learn more about the context object and how it's used in resolvers.
+  [ JavaScript runtime features for resolvers and functions ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-util-reference-js.html) - Learn more about supported runtime features and using utilities to simplify code.
+  [ JavaScript resolver function reference for DynamoDB ](https://docs.amazonaws.cn/appsync/latest/devguide/js-resolver-reference-dynamodb.html) - Learn more about how resolvers interact with DynamoDB.
+  [ JavaScript resolver function reference for OpenSearch ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-reference-elasticsearch-js.html) - Learn more about resolver request and response structure and interactions with OpenSearch Service.
+  [ JavaScript resolver function reference for Lambda ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-reference-lambda-js.html) - Learn more about resolver request and response structure and interactions with Lambda.
+  [ JavaScript resolver function reference for EventBridge data source ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-reference-eventbridge-js.html) - Learn more about resolver request and response structure and interactions with EventBridge.
+  [ JavaScript resolver function reference for None data source ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-reference-none-js.html) - Learn more about resolver request and response structure and interactions with NONE data sources.
+  [ JavaScript resolver function reference for HTTP ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-reference-http-js.html) - Learn more about resolver request and response structure and interactions with HTTP endpoints.
+  [ JavaScript resolver function reference for Amazon RDS ](https://docs.amazonaws.cn/appsync/latest/devguide/resolver-reference-rds-js.html) - Learn more about resolver structure and interactions with RDS.