let url = 'http://wwww.baidu.com?a=1#haha';
let reg = /^(?:(http|https|ftp):\/\/)?((?:[\w-]+\.)+[a-z0-9]+)((?:\/[^/?#]*)+)?(\?[^#]+)?(#.+)?$/i;
console.log(reg.exec(url));
let url = 'http://wwww.baidu.com?a=1#haha';
let reg = /^(?:(http|https|ftp):\/\/)?((?:[\w-]+\.)+[a-z0-9]+)((?:\/[^/?#]*)+)?(\?[^#]+)?(#.+)?$/i;
console.log(reg.exec(url));
本文标题：js网址正则匹配
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