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How to Get 10 from this link (https://google.com/?ib=10)

Check this image
I have this link in (note this link not from search URL)
var link = https://google.com/?ib=10 in main.js file.
Now how to get that 10 from this link in javaScript on Page load
I have tried this way
var link1 = link;
const url3 = new URLSearchParams(link1);
const ur = url3.get("ib");
var finaltgid = ur;
alert(ur);
But its not working may be this code only work when we use window.location.search
Instead of var or const

urlsearchparams does not parse full url, you need to pass only query part, like this:
var link = 'https://google.com/?ib=10';
const url = new URLSearchParams(new URL(link).search);
const ib = url.get("ib");
console.log(ib);

URLSearchParams only accepts the actual query part in the constructor. You are including the full link.

Edit: For a given link you can just supply the link in place of document.location (which directly fetches the pages current location)
Considering this as Vanilla JS. You can do the following.
let params = (new URL(document.location)).searchParams;
let ib = parseInt(params.get('ib')); // is the number 10
Note, using the parseInt to get the value as a number.

How can I get everything after the forward slash in my url?

When I visit my url, my script will get the current URL and store it in a variable with
var currentURL = (document.URL);
I'd like to get everything after the forward slash in my url because there will be a hash ID after the forward slash like this:
www.mysite.com/XdAs2
so this is what would be stored in my variable currentURL and I'd like to take only the XdAs2 from it and store that into another variable. In addition, I'd like to know two other things.
Is document.URL the best way to get the current URL or will I have issues with some browsers?
If I were to try to open that URL using an iframe, will document.URL still work? or must there be an address bar present containing the url? I would really appreciate answers for those questions three questions. Thank you

Here's some pseudo code:
var currentURL = (document.URL); // returns http://myplace.com/abcd
var part = currentURL.split("/")[1];
alert(part); // alerts abcd
Basically:
1) document.URL should work fine in all major browsers. For more info refer to this Mozilla Developer Network article or this SO question
2) for an iframe, you need to write something like: document.getElementById("iframe_ID").src.toString()

Using jquery, you can do he following in order to access every inch of the current URL:
www.mysite.com/XdAs2?x=123
assuming you have the following url:
1- get the url in a jQuery object
var currentUrl = $(location)
2- access everything using the following syntax
var result = currentUrl.attr('YOUR_DESIRED_PROPERTY');
some common properties:
hostname => www.mysite.com
pathname => XdAs2
search => ?x=123
I hope this may help.

If you want everything after the host, use window.location.pathname

Following on from Mohammed's answer you can do the same thing in vanilla javascript:
var urlPath = location.pathname,
urlHost = location.hostname;

Get Absolute Uri in JavaScript

How can i do the same in clean JavaScript
var url = '<%=Request.Url.AbsoluteUri%>';
Thats all!

The location.href property will contain that information.
var url = location.href;

Jquery extract string from url and load remote element

I'm new in Jquery, I would like to have Jquery code to get the current page url and if the url contains certain string then load remote element.
example:
i have the page urls like this:
"http://......./Country/AU/result-search-to-buy"
"http://......./Country/CA/result-search-to-buy"
"http://......./Country/UK/result-search-to-buy"
the part "/Country/AU" is what I need to determine which page element I should load in, then if "AU" I load from "/state-loader.html .state-AU", if "CA" I load from "/state-loader.html .state-CA"
I have a builtin module "{module_pageaddress}" to get the value of the current page url, I just dont know the Jquery logic to let it work.
I expect something like this:
if {module_pageaddress} contains "/Country/AU/"
$('#MyDiv').load('state-loader.html .state-AU');
if {module_pageaddress} contains "/Country/CA/"
$('#MyDiv').load('state-loader.html .state-CA');

You can try the following if the country string is always last before the last slash in the URL
See a live fiddle
var url = "http://......./Country/AU/result-search-to-buy"
var loc = url.split( '/' );
//should be using the next line in live
//var loc = window.location.pathname.split( '/' );
var country = alert(loc [loc.length-2]);

Get relative path of the page url using javascript

In javascript, how can I get the relative path of the current url?
for example http://www.example.com/test/this?page=2
I want just the /test/this?page=2

Try
window.location.pathname+window.location.search

location.href
holds the url of the page your script is running in.

The quickest, most complete way:
location.href.replace(/(.+\w\/)(.+)/,"/$2");

location.href.replace(location.origin,'');
Only weird case:
http://foo.com/ >> "/"

You can use the below snippet to get the absolute url of any page.
var getAbsoluteUrl = (function() {
var a;
return function(url) {
if(!a) a = document.createElement('a');
a.href = url;
return a.href;
}
})();
// Sample Result based on the input.
getAbsoluteUrl('/'); //Returns http://stackoverflow.com/
Checkout get absolute URL using Javascript for more details and multiple ways to achieve the same functionality.

I use this:
var absURL = document.URL;
alert(absURL);
Reference: http://www.w3schools.com/jsref/prop_doc_url.asp

You should use it the javascript way, to retrieve the complete path including the extensions from the page,
$(location).attr('href');
So, a path like this, can be retrieved too.
www.google.com/results#tab=2