# Best Practices ## Use Classes Sygnal uses TypeScript classes extensively in our model because they prove a clean, concise infrastructure. ## Use Libraries Avoid JS Date Math Use Luxon ## Design for Monitorability ### Logging ## Avoid Classes as DOM Selectors Use attributes instead, more versatility for your design team --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://engine.sygnal.com/usage/best-practices.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.