JavaScript runtime features for CloudFront Functions (original) (raw)

The CloudFront Functions JavaScript runtime environment is compliant with ECMAScript (ES) version 5.1 and also supports some features of ES versions 6 through 12.

For the most up-to-date features, we recommend that you use JavaScript runtime 2.0.

The JavaScript runtime 2.0 features has the following changes compared to 1.0:

• Buffer module methods are available
• The following non-standard string prototype methods are not available:
  • String.prototype.bytesFrom()
  • String.prototype.fromBytes()
  • String.prototype.fromUTF8()
  • String.prototype.toBytes()
  • String.prototype.toUTF8()
• The cryptographic module has the following changes:
  • hash.digest() – Return type is changed toBuffer if no encoding is provided
  • hmac.digest() – Return type is changed toBuffer if no encoding is provided
• For more information about additional new features, see JavaScript runtime 2.0 features for CloudFront Functions.

Topics

• JavaScript runtime 1.0 features
• JavaScript runtime 2.0 features

Event structure

JavaScript runtime 1.0 features

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