Function composition is the process of combining two or more functions to produce a new function. The output of one function becomes the input of the next.
Example:
const add = x => x + 1;
const multiply = x => x * 2;
const compose = (...fns) => x => fns.reduceRight((acc, fn) => fn(acc), x);
const composed = compose(multiply, add);
console.log(composed(5)); // 12Tags: advanced, JavaScript, Functional Programming