I work at Appsmith, an open-source low code platform for developers to build internal tools and workflows.
At Appsmith, our developer users define business logic by writing any JS code in between {{ }} dynamic bindings almost anywhere in the app. They can use this while creating SQL queries, APIs, or triggering actions. This functionality lets you control how your app behaves with the least amount of configuration. Underneath the hood, the platform will evaluate all this code in an optimized manner to make sure the app remains performant yet responsive.