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How to trim off the query part of a url using javascript alone?

I've scowerd stackoverflow & for some reason this question is simply not answered in a clear enough manner for me to get right..
I have a url pathname www.thisurl.com/this/url/is/generic%877948
I want to console log the url alone, trimming off the query part of so that all I get is: www.thisurl.com.
I've tried the following:
var pathtotrim = location.href.split('/').pop();
document.write(pathtotrim);
console.log("hello", pathtotrim);
But this trims off the beginning of the url leaving me with /this/url/is/generic%877948.
Essentially doing the opposite of what I want. How can I trim off the query part of a url to be console logged.. please!!!???

Try this:
var pathtotrim = location.href.split('/')[0];
This will split the string on the / but will take the first segment (in your case that would be www.x.com)
Edit:
Like Leilo Faieta Said, location.host or location.hostname would be quicker.

var pathtotrim = "www.thisurl.com/this/url/is/generic%877948".split('/')[0];
document.write(pathtotrim);
console.log("hello", pathtotrim);

let url = 'www.thisurl.com/this/url/is/generic%877948'
console.log(url.replace(/\/.*/g, ''));

There is no need to manipulate strings: you can just use location.host or location.hostname.
This will give you the www part of the url.
on this url:
https://www.google.com/search?safe=off&source=hp&ei=P9SXW7_RO9CKmgWiybjIBA&q=location&oq=location&gs_l=psy-ab.3..0j0i131k1j0l8.269799.273393.0.273746.20.13.4.1.1.0.156.1198.8j4.13.0....0...1c.1.64.psy-ab..2.18.1341.6..35i39k1j0i10k1.98.Zbh8pzpSLkY
you will get
www.google.com
If you want to have all the first part of the url including the http protocol
location.protocol + '//' + location.host
on the same example url you will get
https://www.google.com

how do you insert a variable into a url

I am trying to insert a variable in a url link in javascript but it's not letting me do it, it keeps looking for a file...
here is the code:
var pic = element.src;
document.getElementById('image').style.backgroundImage='url(pic)'
question is how I can insert the variable into the url link..the pic is a link to a photo on a website.

I think the problem is that url(pic) is a string. Try string concatenation instead like:
document.getElementById('image').style.backgroundImage='url(' + pic + ')';

Try this:
document.getElementById('image').style.backgroundImage='url('+pic+')'
To concadenate variable in string, you need to use + in JavaScript.

You need to concatenate the url( and pic and )
document.getElementById('image').style.backgroundImage='url(' + pic + ')';

How to adjust a link using jQuery or Javascript

What I'm trying to do is to change the last character of a link using jQuery or Javascript.
The link that the client will input into the CMS looks something like this: https://www.dropbox.com/sh/wbc1ewhfg1jttpr/AADLfZKlfOBs5e_ueAkzffKRa/SamplePDFDownload.pdf?dl=0
What I'd like to do is to set the website to take this link and replace the '0' on the end of the link with a '1'.
Does anyone know how this could be done automatically?
Any help is appreciated,
Tom

As easy as that:
var url = document.getElementById("id of element").href;
url = url.substring(0, url.length-1);
url = url + "1";
document.getElementById("id of element").href = url;
Probably google first about string functions before asking...

If the pattern of the url stays the same (the parameter dl=0) then you can simply use the .replace()-function:
var url = 'https://www.dropbox.com/sh/wbc1ewhfg1jttpr/AADLfZKlfOBs5e_ueAkzffKRa/SamplePDFDownload.pdf?dl=0';
url = url.replace('dl=0', 'dl=1');

How to remove some part of the URL in the address bar of the browser

I try to remove a part of my url in the addressbar of the browser via javascript.
but I don't understand why it's not working, if I test it in the console the result is correct but it still does not change in the address bar.
How can I do it?
url I have:http://localhost:8090/Home/Index?x=72482&success=itsdone
url I want is:
http://localhost:8888/Home/Index?x=72482
here is my javascript code:
window.location.href.replace('&', '#');
window.location.hash = "";

replace doesn't change the string on which you call it (strings are immutable), it returns a new one.
To replace & with #, do
window.location = window.location.href.replace('&', '#');
If you want to remove everything from the first &, the best is to use a regular expression :
window.location = window.location.replace(/&.*$/,'');
If what you want is to retain the x parameter, then you should rebuild the location to ensure it's still OK if the parameters are in a different order in the URL :
window.location = window.location.replace(/([^?]*).*(\?|&)(x=)([^&]+).*/, "$1?$3$4")
This changes
"http://localhost:8888/Home/Index?a=2&x=72482&c=3"
or
"http://localhost:8888/Home/Index?x=72482&success=itsdone"
into
"http://localhost:8888/Home/Index?x=72482"

window.location will cause a page reload. to change the port too use this
window.location = window.location.protocol
+ "//"
+ window.location.host
+ ":8888/"
+ window.location.pathname
+ window.location.search.substr(0, window.location.search.indexOf('&')-1)

Is there a particular reason why you are passing isDone as a QueryString parameter if you do not even need it? Wouldn't it be easier to not even pass it to begin with and have the page decide if you are done?

How to add URL ending to "w.location.href" in JavaScript?

I'm not really bright at JavaScript, so how do I add to "w.location.href"?. I tried searching, but it's hard to formulate the right question too.
This is part of a bookmarklet for Chrome:
encodeURIComponent(w.location.href)
This will return the active URL in the broswer adress field, like http://www.domain.com. But how can I add to it so the ending will be like, "http://www.domain.com/?rcode=abc1234"?
I tried this:
encodeURIComponent(w.location.href + "?rcode=abc12345")
and
encodeURIComponent(w.location.href + ('?rcode=abc12345')
But nothing workes, OR, it droppes out the "=" in the added string.
--
Ok, I'm adding the EDITED "flipit" code here:
javascript:void((function(d,w,p,s,r,t,l)%7Bt%3D(w.screenTop%7C%7Cw.screenY)%2B50%3Bl%3D(w.screenX%7C%7Cw.screenLeft)%2B(w.innerWidth%7C%7Cd.documentElement.offsetWidth%7C%7C0)/2-s/2%3Bw.__flipboard%3Dw.open(%27https://share.flipboard.com/bookmarklet/popout%3Fv%3D2%26title%3D%27%2BencodeURIComponent(d.title)%2B%27%26url%3D%27%2BencodeURIComponent(w.location.href + "?rcode=wlb535")%2B%27%26t%3D%27%2Bp,%27__flipboard_flipit%27,%27width%3D%27%2Bs%2B%27,height%3D%27%2Br%2B%27,top%3D%27%2Bt%2B%27,left%3D%27%2Bl%2B%27,location%3Dyes,resizable%3Dyes,status%3Dno,scrollbars%3Dno,personalbar%3Dno,toolbar%3Dno,menubar%3Dno%27)%3Bs%3Dd.createElement(%27script%27)%3Bs.setAttribute(%27type%27,%27text/javascript%27)%3Bs.setAttribute(%27src%27,%27https://d2jsycj2ly2vqh.cloudfront.net/bookmarklet/js/popout-helper.min.js%3Ft%3D%27%2Bp)%3Bd.body.appendChild(s)%3BsetTimeout(function()%7Bw.__flipboard.focus()%7D,50)%3B%7D)(document,window,(new Date().getTime()),535,565))

Try this:
var url = window.location;
url = encodeURI(url + '?rcode=abc12345');

If you want to change the location programmatically, use:
window.location.href += encodeURIComponent('?rcode=abc12345');