Match Experiemental package designed for trying out semantics of the pattern matching proposal Test a value matches a pattern import match, { string, number } from "@jamesernator/match" match([string, string, number], ['cats', 'hats', 2]) // true match.on('fizz') .if(string, val => console.log("Got a string!") .else(_ => { throw new Error("Not a string") }) Methods docs coming soon