CoffeeScript
Syntactic sugar that compiles to JavaScript — introduced many clean features later adopted by ES6.
dynamic
transpiled
since 2009
scriptingfunctionaloop
CoffeeScript pioneered many features — arrow functions, destructuring, classes, string interpolation — years before they appeared in ES6. While largely superseded by modern JavaScript and TypeScript, it influenced the entire JavaScript ecosystem’s evolution and introduced a generation of developers to cleaner syntax.