1*899663acS猫头猫import {URL} from 'react-native-url-polyfill'; 2*899663acS猫头猫 3*899663acS猫头猫export default function getUrlExt(url?: string) { 4*899663acS猫头猫 if (!url) { 5*899663acS猫头猫 return; 6*899663acS猫头猫 } 7*899663acS猫头猫 const urlObj = new URL(url); 8*899663acS猫头猫 const filePath = urlObj.pathname; 9*899663acS猫头猫 10*899663acS猫头猫 return ( 11*899663acS猫头猫 filePath.substring(filePath.lastIndexOf('.'), filePath.length) || 12*899663acS猫头猫 filePath 13*899663acS猫头猫 ); 14*899663acS猫头猫} 15