如何将子字符串添加到字符串中

Question

我有一个网址，我需要输入一个端口号到网址。 网址不是有效的网址。 这里有几个展示案例：

https://example.com_users/param/param/param -  https://example.com_users:8080/param/param/param
http://example.co_setting/param/param/param -  http://example.co_settings:1000/param/param/param
http://example.co_setting-  http://example.co_settings:1000

const addPort = (url,port) =>{
    
    combined =  ???????? // how to combian them
    return combined 
}

Answer 1

您可以使用正则表达式：

const addPort = (url, port) => 
    url.replace(/^(https?:\/\/)?([^/]*)(\/.*)?$/, '$1' + '$2:' + port + '$3');

console.log(addPort('http://www.example.com/full/url/with/param', '8080'))

Answer 2

var urlstring = 'https://example.com_users/param/param/param';
var port = ':8080';
var allparts = urlstring.split('//');
var last = allparts[1];
var alllastparts = last.split('/');;
alllastparts[0] = alllastparts[0]+port;

alert(allparts[0]+ '//' + alllastparts.join('/'));
console.log(allparts[0]+ '//' + alllastparts.join('/'));