
AWS AppSync now supports JavaScript for writing all types of resolvers (unit, pipeline, and functions) in GraphQL APIs, enabling developers to handle data access patterns more flexibly alongside existing VTL support.


<div><p>This article announces JavaScript support for all resolver types in AWS AppSync GraphQL APIs, enabling developers to write business logic in JavaScript instead of only Velocity Template Language (VTL).</p><ul><li>JavaScript now supported for unit resolvers, pipeline resolvers, and AppSync functions</li><li>Developers can handle single data source access patterns with JavaScript resolvers</li><li>Pipeline resolvers allow mixing VTL and JavaScript functions for complex patterns</li><li>Two NPM libraries provided: eslint-plugin for development and utils for type validation</li><li>evaluate-code API command available for testing business logic</li><li>Feature available in all AWS regions supporting AppSync</li></ul><p>JavaScript support in AppSync simplifies resolver development by offering an alternative to VTL, improving developer experience and code maintainability.</p></div>


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