Compare two arrays regardless of order

JavaScript

// `a` and `b` are arrays
const isEqual = (a, b) => JSON.stringify([...new Set(a)].sort()) === JSON.stringify([...new Set(b)].sort())

TypeScript

const isEqual = <T,_>(a: T[], b: T[]): boolean => JSON.stringify([...(new Set(a))].sort()) === JSON.stringify([...(new Set(b))].sort())

Examples

isEqual([1, 2, 3], [1, 2, 3]) // true
isEqual([1, 2, 3], [1, 3, 2]) // true
isEqual([1, 2, 3], [1, '2', 3]) // false