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How to keep submenu opened after page load in JavaScript

I have almost done my work and my client ask for keeping submenu opened when user click the item in the menu and also set active color. The idea is better orientation when user actualy is. In React App it wouldn't be problem, cuz whole app works like single page. In this case i've decided use only HTML/JS as my challenge.
Is it even possible somehow keep menu opened/open again menu when new page is loaded please?
I tried make from this app something like single page app by some tutorials like "load paghe without refresh" etc, but nothing worked.
menu
<div class="menu">
<div class="item">
<a class="sub-btn">
Matice
<i class="fas fa-angle-right dropdown"></i>
</a>
<div class="sub-menu">
<a
href="/pages/matice/zakladni-operace.html"
id="matice/zakladni-operace"
onClick="reply_click(this.id)"
class="sub-item">
Základní operace
</a>
<a
href="/pages/matice/hodnosti.html"
id="matice/hodnosti"
onClick="reply_click(this.id)"
class="sub-item">
Hodnost
</a>
<a
href="/pages/matice/determinanty.html"
id="matice/determinanty"
onClick="reply_click(this.id)"
class="sub-item">
Determinanty
</a>
<a
href="/pages/matice/inverzni-matice.html"
id="matice/inverzni-matice"
onClick="reply_click(this.id)"
class="sub-item">
Inverzní matice
</a>
<a
href="/pages/matice/maticove-rovnice.html"
id="matice/maticove-rovnice"
onClick="reply_click(this.id)"
class="sub-item">
Maticové rovnice
</a>
<a
href="/pages/matice/vlastni-cisla-a-vektory.html"
id="matice/vlastni-cisla-a-vektory"
onClick="reply_click(this.id)"
class="sub-item">
Vlastní čísla a vektory
</a>
</div>
</div>
</div>

You can try to get window.location.href on load of your page and add style classes depending on conditionally with something like
<div class="<%= 'yourStyleClass' if #url== 'urURL' %>"> to set active color

You could use AJAX to call the page. But that doesn't sound like what you want. An alternative way in javascript would be to get the current window.location.href when the page loads, then inject a class name into the relevant node, and have the css for that class make it visible and highlighted.
If you're using a library like jQuery this shouldn't be too hard to achieve.

Bulma Navbar burger only working on index.html page

I'm making a website with Bulma (and I'm pretty new to Bulma & CSS frameworks) and have imported Bulma.js for my Navbar burger but it only works on the home (index.html) page.
I'm thinking that the reason for this is because on the other pages I load the navbar with
$("#nav").load("../extras/nav.html");
and import bulma.js normally in the header. I've tried importing it from the nav.html file and putting it in the body. I've also used window.onload in all sorts of ways. I can verify that the bulma.js is loaded as I downloaded and added a console.log and it works.
This loads the nav.html into the div.
<div id="nav"></div>
$(document).ready(function() {
console.log('loading navbar');
$("#nav").load("../extras/nav.html");
});
This is the full nav.html file
And obviously a line linking bulma.js in the head.
The goal is to get the nav burger to work without changing too much of the content (such as linking nav.html) but currently the nav burger does nothing when clicked (except on index.html page which is the same but with the nav.html code hard coded in)
Also, this is my first Stack overflow post (coming from Reddit) so I hope everything is proper and this problem can be resolved.

If you want to skip jquery, and use framework like Vue, here is another solution:
<template>
<nav class="navbar" role="navigation" aria-label="main navigation">
<div class="navbar-brand">
<a class="navbar-item" href="https://bulma.io">
<img src="https://bulma.io/images/bulma-logo.png" width="112" height="28">
</a>
<a role="button" class="navbar-burger burger" aria-label="menu" aria-expanded="false" data-target="navbarBasicExample" v-bind:class="{ 'is-active': showBurger}" #click="showBurger = !showBurger">
<span aria-hidden="true"></span>
<span aria-hidden="true"></span>
<span aria-hidden="true"></span>
</a>
</div>
<div id="navbarBasicExample" class="navbar-menu" v-bind:class="{ 'is-active': showBurger}">
<div class="navbar-start">
<a class="navbar-item">
Home
</a>
<a class="navbar-item">
Documentation
</a>
<a class="navbar-item">
Service
</a>
</div>
</div>
</nav>
</template>
<script>
export default {
data(){
return {
showBurger: false
}
}
}
</script>

This is because you are adding the elements after the JS file has loaded, and after the DOM is "ready". So when the page loads that clickable element does not exist and thus there is nothing attached to that element.
I would suggest one of a few solutions.
Simply add your Nav HTML to each page.
Add the click behavior for the hamburger menu to your Nav HTML template. This is from the Bulma documentation.
<script>
$(".navbar-burger").click(function() {
// Toggle the "is-active" class on both the "navbar-burger" and the "navbar-menu"
$(".navbar-burger").toggleClass("is-active");
$(".navbar-menu").toggleClass("is-active");
});
</script>
Use a templatable language like PHP on the backend, where you can add load templates/resources on the server side as opposed to the front end.

make content slide in and out when clicking link?

I am green in this area and I am trying to learn while I build a virtual resume for a website I can use to advertise my programming services (my strength lies more with C#, Java and similar languages :')
Something I think would look pretty cool, is if when you click on a link in my side-bar, the content on the page slides out and is replaced with the content on the new page that slides in, in the previous page' place.
I am a bit lost on how to achieve this though and if I have to do a per-page thing, or if I can make one general method in Javascript to take care of it. I am using jQuery and bootstrap.
var main;
main = function () {
$(".sidebar-nav a").click(function() {
<!-- Not sure what to do here -->
<!-- Pseudo Code -->
<!-- find out what element was pressed
slide out content on current page using animate();
slide in content from the element that was pressed using animate(); -->
})
}
$("document").ready(main);
The HTML:
<div id="wrapper">
<!-- Sidebar -->
<div id="sidebar-wrapper">
<ul class="sidebar-nav">
<li class="sidebar-brand">
<h1>Brand</h1>
</li>
<li>
<a href="#">
Index
</a>
</li>
<li>
<a href="#">
About Me
</a>
</li>
<li>
<a href="#">
Resume
</a>
</li>
<li>
<a href="#">
Contact
</a>
</li>
</ul>
</div>
<!-- Content -->
<div id="page-content-wrapper">
<div class="container-fluid">
<div class="row">
<div class="col-lg-12">
<h1>h1</h1>
<h2>h2</h2>
<h3>h3</h3>
<h4>h4</h4>
<h5>h5</h5>
<h6>h6</h6>
<p>Grumpy wizards make toxic brew for the evil Queen and Jack.</p>
Toggle Menu
</div>
</div>
</div>
</div>
</div>
Let me know if you need the CSS.

You should use an AJAX technology to seamlessly load another page's HTML contents inline into the document.
The best choice (in my opinion) for this situation is the jQuery function load(), due to it's simplicity and pure convenience. You can also send a callback function, it's easy to implement.
You could then easily implement a CSS animation using the animation attribute.

Jquery mobile, change part of a page

I'm trying to change a part of a page, I know that this has been asked before but I cannot really find a good solution to my issue.
The red colour is the part of the page I want to change dynamically depending on what you click on the left side that is a panel.
Image: http://wstaw.org/m/2014/04/24/ask.png
HTML Code: http://pastebin.ubuntu.com/7322513/
<body id="framework">
<div data-role="page" class="page ui-responsive-panel">
<!-- header -->
<div data-role="header" data-theme="a">
<h1 id="titlepage">ICU</h1>
Menu
Add
</div>
<!-- /header -->
<!-- content that is replaced by ajax -->
<div id="content" data-role="content">
<h2>content</h2>
</div>
<!-- /content -->
<!-- Left menu panel -->
<div data-role="panel" data-position="left" data-position-fixed="false" data-display="overlay" id="nav-panel" data-theme="b">
<ul data-role="listview" data-theme="a" data-divider-theme="a" style="margin-top:-16px;" class="nav-search" id="nav">
<li data-icon="delete" style="background-color:#111;" data-theme="b">
<!--Removed data-rel="close" since there is a bug in jquery mobile https://github.com/jquery/jquery-mobile/issues/1405 -->
Close menu
</li>
<li data-filtertext="Inbox">
<a href="html/dummy.html">
<span class="ui-mail-icon-blue nav-ui-thumbnail"></span>
<span class="ui-li-count ui-btn-up-a ui-btn-corner-all" id="mail#">2</span>
<h1 class="ui-li-headline">Inbox</h1>
<p class="ui-li-desc" id="gotMail">Du har mail!</p>
</a>
</li>
<li data-filtertext="Startsida">
<a href="html/dummy2.html">
<span class="ui-start-icon nav-ui-thumbnail"></span>
<h1 class="ui-li-headline">Startsida</h1>
</a>
</li>
<li data-filtertext="Översikt">
<a href="html/dummy2.html">
<span class="ui-overview-icon nav-ui-thumbnail"></span>
<h1 class="ui-li-headline">Översikt</h1>
<p class="ui-li-desc">Antal elever (2)</p>
</a>
</li>
<!--Nav list divider-->
<li data-role="list-divider" role="heading" class="ui-button ui-li-divider ui-bar-a ui-li-has-count">
Avdelningar
<span id="departments#" class="ui-li-count ui-btn-up-a ui-btn-corner-all">2</span>
</li>
<!--/Nav list divider-->
<!--Auto generated departments-->
<li data-filtertext="Testpage">
<a href="html/dummy.html">
<span class="ui-department-placeholder nav-ui-thumbnail"></span>
<h1 class="ui-li-headline">Avdelning 1</h1>
<p class="ui-li-desc">Antal elever (2)</p>
</a>
</li>
<li data-filtertext="Testpage2">
<a href="html/dummy2.html">
<span class="ui-department-placeholder nav-ui-thumbnail"></span>
<h1 class="ui-li-headline">Avdelning 2</h1>
<p class="ui-li-desc">Antal elever (3)</p>
</a>
</li>
</ul>
</div>
Jquery Code:
function loadPage(page, title) {
$.ajax({
url: page,
async: false
}).done(function (data) {
$("#content").html(data);
$("#titlepage").html(title);
}).fail(function () {
alert("Gick inte att ladda");
});
}
I have done my own ajax loadpage that works but is there a way to use the jquery mobile internal since it feels like a hack.
Conclusion, is there a way to do this better? and how should i load script for each page, using the main-page header to load all of them at once or is there a way to load the script when that content is loaded.
Im using
Jquery jquery-2.1.0
JqueryMobile jquery.mobile-1.4.2
Best Regards

I have done my own ajax loadpage that works but is there a way to use the jquery mobile internal since it feels like a hack.
jQuery Mobile is based on Ajax Navigation; it uses Ajax to retrieve pages, load them into DOM and then initialize them before showing them. This been said, when you use Ajax to load external data, you are doing it the right way.
You can use $.ajax(), .load() or $.get(). However, bear in mind that you need to manually initialize data retrieved - in case it contains jQM widgets - using enhancement methods e.g. .enhanceWithin().
Should I load script for each page, using the main-page header to load all of them at once or is there a way to load the script when that content is loaded.
As you're using Single Page Model, it is safer (maybe you should) load all JS libraries and style sheets in head for each and every page. Nevertheless, jQM will load those links only once on first page's initialization, the rest of pages will be loaded/retrieved via Ajax. jQM loads first data-role=page it finds in any external page and neglects any thing else.
Why to load all JS and style sheets? Is to get jQM working again in case a user refreshes current page. In this case, the current refreshed / reloaded page becomes first page.
Binding events and adding listeners:
When using jQM, you need to stay away from .ready() and/or $(function(){}) and use Page Events. Except for some cases e.g. using External toolbars, panels or popups. Those External widgets need to be initialized manually on first run before page is loaded.
$(function () {
$("#ExternalPanel").panel();
});
As for adding listeners, use pagecreate event.
$(document).on("pagecreate", "#pageID", function () {
$("foo").off("click").on("click", function () {
/* do something */
});
});
You need to remove .off() previous bindings and then .on() add them again, since external pages go through pagecreate whenever they are shown. Because jQM removes external pages from DOM once hidden.
One final point on appending elements to active page. You need to be specific as where you want to add those elements retrieved by Ajax.
var activePage = $.mobile.pageContainer.pagecontainer("getActivePage");
$.get("URL", function (data) {
$("#foo", activePage).html(data).enhanceWithin();
}, "html");
Demo (1) - Code
(1) Click "inbox"

Toggle active class using Ratchet framework

Ratchet mobile framework uses a bottom button structure that looks like this:
<nav class="bar-tab">
<ul class="tab-inner">
<li class="tab-item active">
<a href="#">
<img class="tab-icon" src="img/icon-messages.png">
<div class="tab-label">Label</div>
</a>
</li>
<li class="tab-item">
<a href="#">
<img class="tab-icon" src="img/icon-hamburger.png">
<div class="tab-label">Label</div>
</a>
</li>
<li class="tab-item">
<a href="#">
<img class="tab-icon" src="img/icon-settings.png">
<div class="tab-label">Label</div>
</a>
</li>
I am trying to use JS to change the active tab to which ever one is clicked. The approach I am trying to take to is the following logic.
If the page that the site is on is the same as the href link then show that link active.
<script language="JavaScript">
var sPath=window.location.pathname;
var sPage = sPath.substring(sPath.lastIndexOf('/') + 1);
$('.bar-tab li.tab-inner').click(function() {
$(".active").removeClass("active");
$(this).parent().toggleClass('active', $(this).attr('href') == sPage);
});
</script>
I don't want it to just be the last button clicked because there are other ways to navigate back to the major sections of the app and it will look weird to have a button showing active if the content they are looking at is completely unrelated.
Thanks for any help.

Take a look at emberJS
{{#link-to 'index' classNames='tab-item'}}
<span class="icon icon-list"></span>
<span class="tab-label">Oversigt</span>
{{/link-to}}
With this syntax, based on the routing the current tab is set to active