rounding a number in typescript

rounding.ts

export const DECIMAL_PLACES = 1

// it may have some rounding problems in some cases, but we should be good
export const round = (n: number, decimals: number = DECIMAL_PLACES): number => {
	const abs = n < 0 ? Math.abs(n) : n

	const factorOfTen = Math.pow(10, decimals)
	const rounded = Math.round(abs * factorOfTen) / factorOfTen
	const result = abs === n ? rounded : -rounded

	return result
}