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# AWS::CloudFront::Function FunctionConfig
<a name="aws-properties-cloudfront-function-functionconfig"></a>

Contains configuration information about a CloudFront function.

## Syntax
<a name="aws-properties-cloudfront-function-functionconfig-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-cloudfront-function-functionconfig-syntax.json"></a>

```
{
  "[Comment](#cfn-cloudfront-function-functionconfig-comment)" : String,
  "[KeyValueStoreAssociations](#cfn-cloudfront-function-functionconfig-keyvaluestoreassociations)" : [ KeyValueStoreAssociation, ... ],
  "[Runtime](#cfn-cloudfront-function-functionconfig-runtime)" : String
}
```

### YAML
<a name="aws-properties-cloudfront-function-functionconfig-syntax.yaml"></a>

```
  [Comment](#cfn-cloudfront-function-functionconfig-comment): String
  [KeyValueStoreAssociations](#cfn-cloudfront-function-functionconfig-keyvaluestoreassociations): 
    - KeyValueStoreAssociation
  [Runtime](#cfn-cloudfront-function-functionconfig-runtime): String
```

## Properties
<a name="aws-properties-cloudfront-function-functionconfig-properties"></a>

`Comment`  <a name="cfn-cloudfront-function-functionconfig-comment"></a>
A comment to describe the function.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`KeyValueStoreAssociations`  <a name="cfn-cloudfront-function-functionconfig-keyvaluestoreassociations"></a>
The configuration for the key value store associations.  
*Required*: No  
*Type*: Array of [KeyValueStoreAssociation](aws-properties-cloudfront-function-keyvaluestoreassociation.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Runtime`  <a name="cfn-cloudfront-function-functionconfig-runtime"></a>
The function's runtime environment version.  
*Required*: Yes  
*Type*: String  
*Allowed values*: `cloudfront-js-1.0 | cloudfront-js-2.0`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)