# RuntimeConfig
<a name="API_RuntimeConfig"></a>

The runtime configuration for a web function revision.

## Contents
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 ** runtime **   <a name="lambdaweb-Type-RuntimeConfig-runtime"></a>
The runtime identifier for the web function (for example, a Node.js runtime identifier).  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 30.  
Pattern: `[a-z][a-z0-9]*(\.[a-z0-9]+)*`   
Required: Yes

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/lambda-web-2025-03-07/RuntimeConfig) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/lambda-web-2025-03-07/RuntimeConfig) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/lambda-web-2025-03-07/RuntimeConfig)