CSS @function + CSS if() = The new CSS Custom Functions allow for improved light/dark mode handling beyond just color values.
CSS Functions And Mixins Module Notes | CSS-TricksCSS variables and nesting reduce the need for Sass, but new CSS Functions and Mixins Module may change that in the future.
Custom Functions with RunnableLambda in LangChain JSEach node in LCEL chain must implement Runnable interface, with custom functions added through RunnableLambda for manipulating data flow.