Something went wrong. Try again.
a tool for shared writing and social publishing
Something went wrong. Try again.
TypeScript
12345678910111213141516171819202122232425262728293031323334353637383940414243export function gcd(a: number, b: number): number { return b === 0 ? a : gcd(b, a % b);}
// Find the simplest fraction close to a decimal by testing small denominatorsexport function toFraction( decimal: number, maxDenominator = 100,): [number, number] { let bestNum = 1, bestDen = 1, bestErr = Infinity; for (let d = 1; d <= maxDenominator; d++) { let n = Math.round(decimal * d); let err = Math.abs(decimal - n / d); if (err < bestErr) { bestErr = err; bestNum = n; bestDen = d; if (err < 1e-9) break; } } let d = gcd(bestNum, bestDen); return [bestNum / d, bestDen / d];}
export function getAspectRatio( media: | { width?: number; height?: number; "aspect-ratio"?: number } | undefined,): string | null { if (!media) return null; if (media["aspect-ratio"]) { let [w, h] = toFraction(media["aspect-ratio"]); return `${w}/${h}`; } if (media.width && media.height) { let d = gcd(media.width, media.height); return `${media.width / d}/${media.height / d}`; } return null;}