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Get Base URL from Javascript Helper function in a Laravel Project

I can Get base url of my laravel project from blade file in javascript section by using this
var APP_URL = {!! json_encode(url('/')) !!}
But what should i do to get the base url when i am in a helpers.js like file
isValid(token){
const payload = this.payload(token);
if(payload) {
return payload.iss == "http://127.0.0.1:8000/" || "http://127.0.0.1:8000/register" ? true : false
}
return false
}
i want to get base url here rather asssigning the url separately.
Can anyone Help Me?

Use this to get base url in javascript.
var base_url = window.location.origin;

Check it
var getUrl = window.location;
var baseUrl = getUrl .protocol + "//" + getUrl.host + "/" + getUrl.pathname.split('/')[1];

You Can Use like this:
var baseUrl = window.location.origin;
// "http://google.com"
var host = window.location.host;
// google.com

Constructing URL using HtmlHelper in ASP.NET MVC

I am trying to construct a URL using a HTML helper extension method while trying pass in parameters to the extension method. For example
public static MvcHtmlString GenerateActionLink(this HtmlHelper html,string displayText,string id,int logicstatusId)
{
var actionName = string.Empty;
var controllerName = string.Empty;
if (logicstatusid == 5)
{
actionName = "Basic";
controllerName = "HighBasic";
}
else
{
action = "Advanced";
controllerName = "HighAdvanced";
}
var targetURL = UrlHelper.GenerateUrl("Default", action, controller, new RouteValueDictionary(new { id = id}), RouteTable.Routes, html.ViewContext.RequestContext, false);
//Create the hyper link tag
var anchorLinkBuilder = new TagBuilder("a");
//Merge the target URL with the href attribute
anchorLinkBuilder.MergeAttribute("href", targetURL);
return MvcHtmlString.Create(anchorLinkBuilder.ToString(TagRenderMode.Normal));
}
While this helper method is working, the problem I am facing is on the client side.
var cellHtml = '<div class="action-column">';
var id= row.encryptedId;
cellHtml += '#Html.GenerateHtmlLink("Blip","'+ id+'" , 4)';
cellHtml += "</div>";
return cellHtml;
In this case the URL is getting constructed but the id parameter is not passing on to the helper method. I am not sure if I have done the passing of the parameter the right way. I'd appreciate if anybody help out.

Your C# code (call to the GenerateActionLink helper method) gets executed in server when razor tries to render the view. At that time the js variable value will not be there. The output of razor executing all the C# code view file is just the html markup which the browser will render. Only after that your javascript will be executed and the js variable value will be avaialble.
If you absolutely need to generate the dynamic url (for each id/logicstatusId value) in your client side javascript code using the UrlHelper method, you might consider exposing that C# code via an action method. Whenever you need the link url in your javascript code, make an ajax call to the action method, pass the parameter value and get the url.
public string GenerateActionLink(string id, int logicstatusId)
{
var actionName = "Advanced";
var controllerName = "HighAdvanced";
if (logicstatusId == 5)
{
actionName = "Basic";
controllerName = "HighBasic";
}
var targetUrl = UrlHelper.GenerateUrl("Default", actionName, controllerName, new RouteValueDictionary(new { id = id }), RouteTable.Routes, Request.RequestContext, false);
return targetUrl;
}
And in client side
var id = 1;
$.get('/Home/GenerateActionLink?logicstatusId=5&id=' + id,function(res) {
var htmlMarkup = 'Blip';
// do something with htmlMarkup
// Ex : $('#SomeDivId').append(htmlMarkup);
});
But if you want to do this for many items, you might not want to make a call for each items, In that case,I would generate the base links and conditionally append the querystring values in javascript
var baseUrlBasic = "#Url.Action("Basic","HighBasic");
// Now later
var id = 1;
var newUrl = baseUrl+'?logicstatusId=5&id='+id;
// Use this to build the anchor tag

How can I extract and then change the url path using javascript?

I am trying to extract part of the url and replace it with custom text using javascript.
For example, I want to fetch the current url such as:
mydomain.com/url_part_to_change/some-other-stuff
and then change that url to insert so that new new url is:
mydomain.com/new_url_part/some-other-stuff
Here is what I have:
function changeURL() {
var theURL = window.location.pathname;
theURL.replace("/url_part_to_change/", "/new_url_part/");
//Set URL
}
However, when I try to call the function changeURL(), it returns undefined instead of the new url.
For example if I do this:
alert(changeURL());
then what alerts is undefined

TL;DR
// update the pathname that will reload the page
window.location.pathname = myNewPathname;
Further Explanation:
Window.location ( image attached below ) provides you an object containing all the uri parts information. So, you can get this object via window.location and access the property pathname then do your stuffs. For example:
var locationObject = window.location;
var pathnameToChange = locationObject.pathname;
// do stuffs to "copy" of pathname, this will not reload the page
var myNewPathname = doSomethingMyPathname( pathnameToChange );
Additional Examples:
Alternatively, set new url using location.href. Check the MDN documentation for examples on location.assign(), location.replace(), location.reload() and notes on the different available functions
// ie.myNewUrl is something I created -> www.blah.com/updated/path
window.location.href = myNewUrl;
// or
window.location.assign(myNewUrl)
A window.location Object in Console
There are three references to further understand URI components
URI_scheme
Standards written by Tim Berners-Lee
MDN Location
Hope this helps.

This should work for you correctly:
function changeURL() {
// Get the url, just as you did
var theURL = window.location.pathname;
// Return the url
return theURL.replace("/url_part_to_change/", "/new_url_part/");
}

you are not returning any thing in function, Please make function like
function changeURL() {
var theURL = window.location.pathname;
return theURL.replace("/url_part_to_change/", "/new_url_part/");
//Set URL
}

As the others said, you don't return anything. What they are forgetting is that String.replace() just makes a copy of theURL and doesn't change theURL.
Try this:
function changeURL() {
var theURL = window.location.pathname;
theURL = theURL.replace("/url_part_to_change/", "new_url_part/");
//Set URL
return theURL;
}
alert(changeURL());

function changeURL() {
//set new path
window.location.pathname = "/new_url_part/";
//get new url
const newURL = window.location.href;
return newURL;
}

You forgot to return
function changeURL() {
var theURL = window.location.pathname;
var newURL = theURL.replace("/url_part_to_change/", "/new_url_part/");
//Set URL
return newURL;
}
alert(changeURL())//Now you won't see undefined.

This is quite an old post but just to add:
modifying window.location causes page navigations so if thats not desired create a new URL object and then you can modify the parts as needed.
in my case i needed to change the path to a value from a value in the querystring.
eg.
/*
* http://something.com/some/path?redirect=/some/other/path
* ->
* http://something.com/some/other/path
*/
let u = new URL(window.location.href)
u.pathname=u.searchParams.get("redirect")
u.searchParams.delete("redirect")
console.log(u.href)

Need help turning a jQuery object back into a string

(i am new. please bear with me.) I have a jquery object that I need to convert back to html to use. What I am doing is using jQuery's get to get the HTML DOM of a local file. The data returned is then made into an object and I perform some tweaks on it (like changing hrefs etc.)
$.get(imagePath + "bloghome.aspx", function (data) {
var pageHtml = $(data);
pageHtml.find('a').each(function () {
var longHref = $(this).attr('href');
var tmp = longHref.lastIndexOf('ID=');
var id = longHref.substring(tmp + 3) + '.htm';
var newHref = imagePath.concat(id);
$(this).attr('href', newHref);
});
});
the object is created in the second line and then i change the hrefs. What I need now is to turn that object back into a string so that I can write it to a file.
I am using PhoneGap but any help would be appreciated as I am stumped

You can do this way using pageHtml[0].outerHTML:
$.get(imagePath + "bloghome.aspx", function (data) {
var pageHtml = $(data);
pageHtml.find('a').each(function () {
var longHref = $(this).attr('href');
var tmp = longHref.lastIndexOf('ID=');
var id = longHref.substring(tmp + 3) + '.htm';
var newHref = imagePath.concat(id);
$(this).attr('href', newHref);
var htmlString = pageHtml[0].outerHTML; //<-- Here
});
});

from http://api.jquery.com/html/
console.log(pageHtml.html());

Can you just do
pageHtml.html();
?
EDIT: Using this will only give you the contents inside the main wrapping element, if you want the entire thing, you can use:
pageHtml[0].outerHTML;
instead.

MVC 4 Pass value from Javascript to Controller

In my view, I have a javascript function to handle a select event on a pie chart. The function is shown below:
function selectHandler() {
var selectedItem = visualization.getSelection()[0];
if (selectedItem) {
var val = data.getFormattedValue(selectedItem.row, 0);
location.href = '/Tickets';
}
}
Currently I am on the Home Controller in the Groups View. I want to navigate to the Index View of the Tickets Controller while passing the selected value from the javascript variable "val". How would I go about doing this?

Are you intending to manually navigate the user?
If you're looking for a redirect JavaScript way, then you would do something as simple as...
location.href = '/Tickets?value=' + val;
Now this may not work for everything. For example, if location.href already contains a '?', and you need to maintain that context, then you need to use '&'. Maybe your app lives in a Virtual Directory.
You might do something like...
var newUrl = location.href;
if (newUrl.indexOf('?') > -1)
newUrl += '&';
else
newUrl += '?';
newUrl += val;
This allows you maintain any existing context as well.
If you expect the ticket to already be defined, you might need to remove that from the query string, if it already exists.
In that case then you might want to do something like...
var params = location.search.substring(1).split('&'),
paramToRemove, indexOfValue,
hasSearch = false,
param;
for (var i = 0, len = i; i < len; i++)
{
param = params[i];
indexOfValue = param.indexOf('value');
hasSearch = param.indexOf('?') === 0;
if (indexOfValue === 0 || (indexOfValue === 1 && hasSearch ))
{
paramToRemove = params[i];
break;
}
}
var newUrl = location.href;
// Remove old value
if (paramToRemove) newUrl = newUrl.replace(paramToRemove, hasSearch ? '?' : '');
// Add proper search char
if (newUrl.indexOf('?') > -1)
newUrl += '&';
else
newUrl += '?';
// Add new value
newUrl += val;

location.href = '/Tickets?val=' + val;

//On page load the server will generate the URL for you.
var ticketURL = '#Url.Action("Index", "Tickets")';
//Append the value to the URL
ticketURL = ticketURL + '?val=' + val;
//Do your stuff!

Since, you are calling Controller methods from javascript. You should make an POST ajax call to Ticket Controller and passing Action method name also.
Your code would be like this:
return $.post('/Ticket(ControllerName)/Index(method name)/',parameters here);
Inside API Controller, Index method will accept the same param which we are passing from our javascript.
ActionResult Index(parameter){...}