TaffyDB is a JavaScript library that is open source and integrates robust database functionalities into JavaScript applications. With its compact file size, it ensures rapid query performance while offering a data selection engine that is designed with JavaScript in mind. The library provides features akin to traditional databases, such as counting, updating, and inserting records, all while ensuring strong compatibility across different web browsers. Its design allows for easy extension through custom functions and seamless integration with any DOM library, as well as server-side JavaScript environments. Setting up a database is a simple process; users can create an empty database, one with a single object, an array, or even a JSON string. After establishing a database, you can execute queries by invoking the root function and constructing filter objects to refine your search. TaffyDB enables filtering based on database names and object comparisons, facilitating easy data access and dynamic modifications. Additionally, the use of custom functions grants users comprehensive control over query outcomes, enhancing the overall flexibility and power of the library in various applications. This versatility makes TaffyDB an excellent choice for developers seeking to implement database-like capabilities directly in their JavaScript projects.