Js regular Filter domain name section

how to Filter domain name (bold)

https://blog.csdn.net/orangleliu/article/details/8822987
http://platform.baidu.com:8080/sss/kk/ll.action
http://platform.ishangzu.com:8080/zz/dd/visit?id=1&cc=N


let arr=[
        'https://blog.csdn.net/orangleliu/article/details/8822987',
        'http://platform.baidu.com:8080/sss/kk/ll.action',
        'http://platform.ishangzu.com:8080/zz/dd/visit?id=1&cc=N'
    ]
    arr=arr.map(item=>item.replace(/^https?:\/\/(.*?)(:\d+)?\/.*$/,'$1'));
    console.log(arr);

var arr=[
        'https://blog.csdn.net/orangleliu/article/details/8822987',
        'http://platform.baidu.com:8080/sss/kk/ll.action',
        'http://platform.ishangzu.com:8080/zz/dd/visit?id=1&cc=N'
    ];
arr.join(",").match(/\bhttps?:\/\/[^:\/]+/ig);
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