Utilities._replaceURL = function()

in src/css.build.js [275:300]

• 22 lines of code
• 12 McCabe index (conditional complexity)

        Utilities._replaceURL = function (contents, replacer) {
            // Use ")" as the terminator as quotes are oftentimes not used at all
            return contents.replace(/url\(\s*([^\)]+)\s*\)?/g, function (_) {
                var matches = [];
                for (var _i = 1; _i < arguments.length; _i++) {
                    matches[_i - 1] = arguments[_i];
                }
                var url = matches[0];
                // Eliminate starting quotes (the initial whitespace is not captured)
                if (url.charAt(0) === '"' || url.charAt(0) === '\'') {
                    url = url.substring(1);
                }
                // The ending whitespace is captured
                while (url.length > 0 && (url.charAt(url.length - 1) === ' ' || url.charAt(url.length - 1) === '\t')) {
                    url = url.substring(0, url.length - 1);
                }
                // Eliminate ending quotes
                if (url.charAt(url.length - 1) === '"' || url.charAt(url.length - 1) === '\'') {
                    url = url.substring(0, url.length - 1);
                }
                if (!Utilities.startsWith(url, 'data:') && !Utilities.startsWith(url, 'http://') && !Utilities.startsWith(url, 'https://')) {
                    url = replacer(url);
                }
                return 'url(' + url + ')';
            });
        };