In Sitecore, while working for real-time projects, you may get scenarios where you would see a need to customize you rendering output to serialze. Sitecore provides three different ways of customizing your rendering output with Sitecore JSS. They are as below. • Use JSS GraphQL Support - Using Integrated GraphQL queries • Use Out-of-the-box Rendering Content Resolvers - Using Sitecore JSS built-in Rendering Content Resolvers • Implementing a Custom Rendering Content Resolvers by inheriting RenderingContentsResolver Why Customization? In Sitecore development, many times we encounter scenarios to deal with hierarchical item structures like multi-level menu, product category, product sub-category, product details, forms etc., and even, in case where there is a need to combine the Sitecore data with any non-Sitecore data. In these types, Sitecore JSS is not able to serialize item structures with sub-hierarchies into JSON. Sitecore Jss allow us custiomize in