let reg = /^(?:(http|https|ftp)://)?((?:[w-]+.)+[a-z0-9]+)((?:/[^/?#]*)+)?(?[^#]+)?(#.+)?$/i;
let str = 'https://www.zhufeng.cm';
console.log(reg.exec(str))
let reg = /^(?:(http|https|ftp)://)?((?:[w-]+.)+[a-z0-9]+)((?:/[^/?#]*)+)?(?[^#]+)?(#.+)?$/i;
let str = 'https://www.zhufeng.cm';
console.log(reg.exec(str))