import window from 'global/window'; var DEFAULT_LOCATION = 'https://example.com'; var resolveUrl = function resolveUrl(baseUrl, relativeUrl) { // return early if we don't need to resolve if (/^[a-z]+:/i.test(relativeUrl)) { return relativeUrl; } // if baseUrl is a data URI, ignore it and resolve everything relative to window.location if (/^data:/.test(baseUrl)) { baseUrl = window.location && window.location.href || ''; } var protocolLess = /^\/\//.test(baseUrl); // remove location if window.location isn't available (i.e. we're in node) // and if baseUrl isn't an absolute url var removeLocation = !window.location && !/\/\//i.test(baseUrl); // if the base URL is relative then combine with the current location baseUrl = new window.URL(baseUrl, window.location || DEFAULT_LOCATION); var newUrl = new URL(relativeUrl, baseUrl); // if we're a protocol-less url, remove the protocol // and if we're location-less, remove the location // otherwise, return the url unmodified if (removeLocation) { return newUrl.href.slice(DEFAULT_LOCATION.length); } else if (protocolLess) { return newUrl.href.slice(newUrl.protocol.length); } return newUrl.href; }; export default resolveUrl;