private static _replaceURL()

in src/css.build.ts [351:374]

• 18 lines of code
• 11 McCabe index (conditional complexity)

		private static _replaceURL(contents: string, replacer: (url: string) => string): string {
			// Use ")" as the terminator as quotes are oftentimes not used at all
			return contents.replace(/url\(\s*([^\)]+)\s*\)?/g, (_: string, ...matches: string[]) => {
				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 + ')';
			});
		}