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How to set active TAB /active/color-changed or whatever similar event on the selected TAB

I know it has been explained in many places here but I can't get it to work.
It concerns: how to use JavaScript which is in - under wwwroot created - folder in a *.js file.
What I am using:
Blazor Server App empty (VS2022, C#).
I only need/use Server App in VS2022 C# and empty - without any predefined navbars and other elements. So there are no any *.cshtml files except one which is automatically created while creating a "Blazor Server App Empty" in VS 2022 and that is "_Host.cshtml"
And I don't want to use any other template in VS 2022, only this one mentioned.
So, after creating a "page" using this in VS integrated template, I added following in MainLayout.razor (I am using *razor and only razor - no any cshtml):
// this was originally created as in the template in VS2022
#inherits LayoutComponentBase
//this one also:
<main> #Body </main>
// That is what I added here in MainLayout.razor, it's from this site: [http://jsfiddle.net/Ag47D/3/](https://www.stackoverflow.com/)
<div class="navbar">
<div class="navbar-fixed-top">
<div class="container" style="width: auto;">
<div class="nav-collapse" id="nav-collapse">
<ul class="nav" id="nav">
<li id="home">Home</li>
<li id="skill">Skill</li>
<li id="research">Research</li>
<li id="link">Link</li>
</ul>
</div>
</div>
</div>
</div>
And then I added the css part to the existing "site.css" in that simply VS 2022 project:
`.navbar #nav > .active > a {
color: red;
}`
And finally - and that is the big issue for me to understand WHRE/HOW to handle that . a simply JavaScript part (you can find that on the same site mentioned):
` $(function() {
$('#nav li a').click(function() {
$('#nav li').removeClass();
$($(this).attr('href')).addClass('active');
});
});`
I added that to a created folder in wwwroot, the flder is called: "js" and the file inside that folder is called: "setactivetab.js". In that file is the mentioned part of javascript.
In "_Host.cshtml" I added then that, here the part of that _Host.cshtml where you can see what I added:
`....
....
Reload
<a class="dismiss">🗙</a>
</div>
<script src="~js/setactivetab.js"></script>
<script src="_framework/blazor.server.js"></script>
</body>
</html>`
So I tried with:
<script src="~js/setactivetab.js"></script>
and:
<script src="js/setactivetab.js"></script>
and:
<script src="~/js/setactivetab.js"></script>
But nothing worked. I mean: TABS are shown on the page - no question about that - but if I click on one of that TABs - nothing happens, the color isn't changed.
Somehow I am not able to understand how to use a self created/from google downloaded, JavaScript for simply changing of the color or to set a selected TAB as active/current or however we can use that.
I tried so many examples described on the web. I can't get that working - maybe I am missing/not understood some fundamental knowledge of using a JavaScript. I simply don't know the way how one can use that.
Can you please post me here a working example of a navigation TABS, ideally self created and simply? Important is: WHERE to put a javascript and how to access that properly so the clicking on a TAB wil lchange his color and stay so until I click on another TAB in a simply - if possible: horizontal, not vertical, navigation bar.
I have enough from searching/reading of many web sites descriptions as there works all and if I copy&paste some simply example, it doesn't work.

Change html content and url without reloading the page

I see many websites such as gitHub changing it's html content and URL without refreshing pages.
I find one possible way to do this in HTML Histroy API.
Here is the code.
HTML
<div class="container">
<div class="row">
<ul class="nav navbar-nav">
<li>Home</li>
<li>About</li>
<li>Contact</li>
</ul>
</div>
<div class="row">
<div class="col-md-6">
<div class="well">
Click on Links above to see history API usage using <code>pushState</code> method.
</div>
</div>
<div class="row">
<div class="jumbotron" id="contentHolder">
<h1>Home!</h1>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry.</p>
</div>
</div>
</div>
</div>
home.html
This is home page
about.html
This is about page
contact.html
That one is content page
JAVASCRIPT
<script type="text/javascript">
jQuery('document').ready(function(){
jQuery('.historyAPI').on('click', function(e){
e.preventDefault();
var href = $(this).attr('href');
// Getting Content
getContent(href, true);
jQuery('.historyAPI').removeClass('active');
$(this).addClass('active');
});
});
// Adding popstate event listener to handle browser back button
window.addEventListener("popstate", function(e) {
// Get State value using e.state
getContent(location.pathname, false);
});
function getContent(url, addEntry) {
$.get(url)
.done(function( data ) {
// Updating Content on Page
$('#contentHolder').html(data);
if(addEntry == true) {
// Add History Entry using pushState
history.pushState(null, null, url);
}
});
}
</script>
This code is working fine even you go back or forward in browser.
But the problem is that when you refresh page it only shows the file which is being refreshed. For example, if you refresh the about.html then only the following will show: This is the about page.
Unlike the gitHub it can't show the complete page. As you see in gitHub, even you refresh a page it will show the page same as how it was before refreshing.
How can I do that?
Thanks...

You may use Routie or Director to do the routing. And within their callback functions write the code to update the part of your HTML page, for this you may use Fragment.js.

You can change DOM anytime you want without loading the page.
Use fundamental XMLHTTPRequest or Ajax to contact the server without refreshing the browser.
There are many frameworks which offer convenient url routing which can change content automatically without page refreshes. Angular JS is my favorite such framework which offers great routing capability among many other things.

You have to check/set the value of your variable on the event onload of the page.

Your code does not work - when you click on a particular link the page does refresh. correct me if i am wrong.

HTML + jquery - menu to change contents in the content DIV

I've been digging around on how to do it, but didn't find any solution which would fulfill my needs.
Got a basic layout of my page with menu on the left, separate div for header and a div in the middle where all the content should be displayed when one of the menu buttons is selected.
I'd like to change the content only of the "content" div dynamically without reloading the page when one of the menu buttons is pressed.
I've managed to do it as per below with jquery:
<script type="text/javascript" charset="utf-8">
$(document).ready(function(){
$('#nav ul li a').click(function(){
$('#main').load('contents.html #' + $(this).attr('href'));
return false;
});
});
The menu :
<nav id="nav">
<ul class="menu">
<li class="menu1"></li>
<li class="menu2"></li>
<li class="menu3"></li>
<li class="menu4"></li>
<li class="menu5"></li>
</ul>
</div>
</nav>
contents.html file sample:
<div id="menu1">
<h2>Menu1</h2>
<p>Menu1 page contents</p>
</div>
So when menu1 button is pressed I'm able to change the content of main div to reflect the relevant data - this works.
My questions are:
1) is this the correct way on how to do it ? If not what would you recommend ?
2)I want to display more advanced stuff not only text (e.g What if I want to have another jquery in the div-id="menu1" ? I've tried it and it didn't work.)
P.S - I'm just a beginner so maybe I've missed something basic - but couldn't fix it by myself.
Thanks in advance!
Peter

I think there are a number of ways to achieve what you want. It depends on the nature of the content you want to load.
If there isn't masses of it, you could load it all onto the page on page load within different div's and then just show and hide the relevant div when clicking the menu items. (have a look at twitter bootstrap for some implementations, things like tabbed browsing).
If you do just have text, you could use ajax to load in the data from an external file w3schools.com.
Alternatively as mentioned in a comment above, you could create a single page application using something like angular.js, knockout.js etc.
Hope that helps.

How to run javascript code on menu click

I'm creating a squarespace website in which I have a navigation bar.
I would like to add a javascript code as a link in the navigation bar.
The javascript code is the following:
<div>
<script type="text/javascript" src="https://app.ecwid.com/script.js?4549118"></script>
<script type="text/javascript"> xMinicart("style=","layout=Mini"); </script>
</div>
I have the following html code: (I got it with FireBug)
<nav id="main-navigation">
<ul class="cf">
<li class=" active-link">
page1
</li>
<li class="">
page2
</li>
</ul>
</nav>
I cannot edit the code above but I'm able to inject header code.
So, how can I add the javascript code as a third link in the navigation bar?
Thanks a lot!
edit
So I've added the following code
<script>
window.onload=function(){
$('nav ul').append('<li><a onClick="test()" href="javascript:void(0);">Link 3</a></li>');
}
</script>
but I need the original javascript code within the append. I need the actual code to be the link. How do I do that? If you see the javascript in Firefox you'll understand what I mean. I need the actual link it generates in the navigation bar.
Thanks!

window.onload=function(){
$('nav ul').append('<li><a onClick="yourFunction()" href="javascript:void(0);">Link 3</a></li>');
}
Since you specify you don't have direct access to the html. Only the header.
This will add your menu item with a link, that upon click, executes the function yourFunction(). It will add this item as soon as the page loads.
Note: You need jQuery for the above. But it is also possible with raw Js.

JQuery $(document).ready(function () not working

This is the first page where I try to open the detail.html;
<a href="detail.html" data-role="none" role="link">
<div class="place">name</div>
<div class="arrow"></div>
<div class="ammount">-€4,<span class="fontsize14">25</span></div>
</a>
I have problems to load the scripts on detail.html (after href link is clicked on first page)
Here is my script in header of details.html(the page I go after href is clicked on first page), Problem is I can NOT get the console test print, that function is NOT called when details.html page is loaded. It only hits after I manually refresh the page
<script>
$(document).bind("pageinit", function(){//or $(document).ready(function ()
console.log('test');
});
</script>

To understand your problem I think you need to first understand how jQuery Mobile "loads" external pages. By default when you click a link to a separate HTML page JQM loads the first data-role="page" on that page and attaches it to the DOM of the first page, the thing is JQM only loads that page div and not any scripts etc. that are outside that container.
If you want to run code for a second page, you either need to include that script on your first page and use event delegation (since the second page is not part of the DOM yet) or include the script withing the second page's date-role="page" wrapper.
Case in point in your case if you want to run code for your details page you either need to include the script on your first page for example assuming you have a div on your detail.html page like the following
<div id="details" data-role="page"> ..rest of your content
</div>
Then on your first page you could do the following
$(document).on('pageinit', '#details', function() {
console.log('test');
});
Or alternatively you can include a script tag withing your "details" page wrapper.
EDIT:
As I mentioned this is the default behavior, however if you wish you can tell jQuery Mobile to do a full post when loading a second page by adding in data-ajax="false" or rel="external" to your link for example
<a href="detail.html" data-ajax="false" data-role="none" role="link">
<div class="place">name</div>
<div class="arrow"></div>
<div class="ammount">-€4,<span class="fontsize14">25</span></div>
</a>
The difference between data-rel="external" and data-ajax="false" is if the second page is basically semantic in that data-rel="external" should be used if the second page is on a different domain.

I made you an working example: http://jsfiddle.net/Gajotres/Eqzd2/
$("#second").live('pagebeforeshow', function () {
console.log('This will only execute on second page!');
});
You can use on instead of live if you are using last version of jQuery.
Also take a look at my article about event flow in jQM page transition: https://stackoverflow.com/a/14010308/1848600