export const isAbsoluteURL = (url: string): boolean => { // A URL is considered absolute if it begins with "://" or "//" (protocol-relative URL). // RFC 3986 defines scheme name as a sequence of characters beginning with a letter and followed // by any combination of letters, digits, plus, period, or hyphen. return /^([a-z][a-z\d\+\-\.]*:)?\/\//i.test(url) } export const combineURLs = (baseURL: string, relativeURL: string): string => { return relativeURL ? baseURL.replace(/\/+$/, '') + '/' + relativeURL.replace(/^\/+/, '') : baseURL }