Symfony, bootstrap drop down is not working? - javascript

I was trying to make a navigation bar for my web page following bootstraps template. I've attached it to my base.html.twig file for a Symfony project. It works fine besides the drop down menu which when clicked does not diplay
Here's my twig document
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>{% block title %}Health Centre Ireland{% endblock %}</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css"
integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
<link rel="stylesheet" href="{{ asset('css/styles.css') }}"/>
{% block stylesheets %}{% endblock %}
<link rel="icon" type="image/x-icon" href="{{ asset('redcross.ico') }}" />
</head>
<body>
<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
<a class="navbar-brand" a href="#">Health Centre Ireland</a>
<button class="navbar-toggler" type="button" data-toggle="collapse"
data-target="#navbarsExampleDDefault" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarsExampleDefault">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="#">Home <span class="sr-only"></span> </a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Calender</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Message Board</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu" aria-labelledby="dropdown01">
<a class="dropdown-item" href="#">My Profile</a>
<a class="dropdown-item" href="{{ logout_path('main') }}">Log Out</a>
<a class="dropdown-item" href="#">Delete Profile</a>
</div>
</li>
</ul>
</div>
</nav>
</body>
I have tried to put JavaScript at the bottom of my document before I close out the body and html, but this makes the content of the page besides the navbar disappear. Any help would be greatly appreciated, thank you


You need to add javascript like indicated in the official documentation of bootstrap (https://getbootstrap.com/docs/4.0/getting-started/introduction/)
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>


Yes, you could need to load also de JavaScript files from bootstrap possibly.
Sometines but, it's only necessary a CSS file to make work the dropdowns. Make sure the properties from the CSS you are using appears in the CSS file you added from bootstrap. Maybe is the wrong CSS.

Related

Dropdown not worked on bootstrap 5.3

I trying to create navigation bar with bootstrap.
I read the docs from here, but my drop down not working.
I attached everything in the <head> <head/> section but dropdown not worked for me.
This is my code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>НИМХ - АС и БД, Филиал - Пловдив</title>
<!-- index.css -->
<link rel="stylesheet" href="./css/index.css">
<!-- CSS Leaflet-->
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.9.3/dist/leaflet.css"
integrity="sha256-kLaT2GOSpHechhsozzB+flnD+zUyjE2LlfWPgU04xyI="
crossorigin=""/>
<!-- JS Leaflet -->
<script src="https://unpkg.com/leaflet#1.9.3/dist/leaflet.js"
integrity="sha256-WBkoXOwTeyKclOHuWtc+i2uENFpDZ9YPdf5Hf+D7ewM="
crossorigin=""></script>
<!-- CSS Bootstrap-->
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
<!-- JS Bootstrap-->
<script src="https://cdn.jsdelivr.net/npm/#popperjs/core#2.11.6/dist/umd/popper.min.js" integrity="sha384-oBqDVmMz9ATKxIep9tiCxS/Z9fNfEXiDAYTujMAeBAsjFuCZSmKbSSUnQlmh/jp3" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.min.js" integrity="sha384-mQ93GR66B00ZXjt0YO5KlohRA5SY2XofN4zfuZxLkoj1gXtW8ANNCe9d5Y3eG5eD" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>
</head>
<body>
<nav class="navbar navbar-expand-lg bg-body-tertiary">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Dropdown
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><hr class="dropdown-divider"></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
<form class="d-flex" role="search">
<input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success" type="submit">Search</button>
</form>
</div>
</div>
</nav>
<div id="map">
<!-- Load map -->
<script src="./js/leaflet.js"></script>
</div>
</body>
</html>
Can I get example with worked dropdown on bootstrap 5.3 ?
I think I have attached all the necessary libraries for the dropdown menu to work ?

You have to add Bootstrap's JavaScript as well:
// Add this line before the closing </body> tag
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>
i.e.
<div id="map">
<!-- Load map -->
<script src="./js/leaflet.js"></script>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>
</body>
</html>

You have included BOOTSTRAP twice!
delete this row from your head tag
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.min.js" integrity="sha384-mQ93GR66B00ZXjt0YO5KlohRA5SY2XofN4zfuZxLkoj1gXtW8ANNCe9d5Y3eG5eD" crossorigin="anonymous"></script>
Working example without it: https://jsfiddle.net/MarinHTML/8kscdbn9/11/
------EDIT----- depricated old answer: ---
you're gonna need some JS to do the job here, because what you did is NEST a dropdown into another dropdown. Not sure if possible by simple bootstrap means. You can, but it must be on hover, and I presume you don't want that.
Here is a quick example of what I think you want:
https://jsfiddle.net/MarinHTML/t7zmqcd9/
And here is the JS to use it:
let dds = document.querySelectorAll('.dropdown-toggle')
dds.forEach((dd)=>{
dd.addEventListener('click', function (e) {
var el = this.nextElementSibling
el.style.display = el.style.display==='block'?'none':'block'
})
})

Bootstrap provides you with several stackblitz links to check their templates, like this: https://stackblitz.com/run?file=index.html
Used on your code would be something like this:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>НИМХ - АС и БД, Филиал - Пловдив</title>
<!-- index.css -->
<link rel="stylesheet" href="./css/index.css">
<!-- CSS Leaflet-->
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.9.3/dist/leaflet.css"
integrity="sha256-kLaT2GOSpHechhsozzB+flnD+zUyjE2LlfWPgU04xyI="
crossorigin=""/>
<!-- JS Leaflet -->
<script src="https://unpkg.com/leaflet#1.9.3/dist/leaflet.js"
integrity="sha256-WBkoXOwTeyKclOHuWtc+i2uENFpDZ9YPdf5Hf+D7ewM="
crossorigin=""></script>
<!-- CSS Bootstrap-->
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
<!-- JS Bootstrap-->
<script src="https://cdn.jsdelivr.net/npm/#popperjs/core#2.11.6/dist/umd/popper.min.js" integrity="sha384-oBqDVmMz9ATKxIep9tiCxS/Z9fNfEXiDAYTujMAeBAsjFuCZSmKbSSUnQlmh/jp3" crossorigin="anonymous"></script>
</head>
<body>
<nav class="navbar navbar-expand-lg bg-body-tertiary">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Dropdown
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><hr class="dropdown-divider"></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
<form class="d-flex" role="search">
<input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success" type="submit">Search</button>
</form>
</div>
</div>
</nav>
<div id="map">
<script src="./js/leaflet.js"></script>
</div>
<!--here -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.bundle.min.js"> </script>
<!-- here -->
</body>
</html>
So all that you are missing is the:
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.3.0-alpha1/dist/js/bootstrap.bundle.min.js"></script>
before the body close tag

Bootstrap5-Toggler Button

I have used the toggler button using bootstrap 5 in the navbar but it is not displaying the navbar items that are collapsed on minimizing browser screen. Why is it not working properly? and how to resolve it?
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" >
<title>
bootstrap installation
</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.2.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Zenh87qX5JnK2Jl0vWa8Ck2rdkQ2Bzep5IDxbcnCeuOxjzrPF/et3URy9Bv1WTRi" crossorigin="anonymous">
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<a class="navbar-brand" href="">tindog</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
<ul class="navbar-nav m-lg-auto">
<li class="nav-item">
<a class="nav-link" href="">Contact</a>
</li>
<li class="nav-item">
<a class="nav-link" href="">Pricing</a>
</li>
<li class="nav-item">
<a class="nav-link" href="">Download</a>
</li>
</ul>
</div>
</nav>
</body>
</html>

The code you provided works fine for me. Are you sure you included the Bootstrap JS file?

You are missing a bootstrap JS CDN link, Add this inside your head element
<head>
...
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.2.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-OERcA2EqjJCMA+/3y+gxIOqMEjwtxJY7qPCqsdltbNJuaOe923+mo//f6V8Qbsw3" crossorigin="anonymous"></script>
</head>

Jquery Scroll not firing when using

So when I scroll down the page it will not work at all when I am using bootstrap it just doesn't work but when I use website with just that js and html & css no <head> tags or anything it will work. My code is below.
I don't know what I can do to fix this. I've tried for about 3 hours trying to make it work but no matter what I do it wont work even if I remove the addclass and remove class and put a console.log it wont even work. My friend uses the same js for his website and it works but I dont know what it is on my website that makes it different. We use the same jquery version.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no" name="viewport">
<link rel="icon" href="#" type="image/png">
<title>PrismPanel | Home</title>
<link rel="stylesheet" href="./static/css/bootstrap.min.css">
<link rel="stylesheet" href="./static/css/style.css?v=0.1">
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light sticky-top" id="navbar">
<div class="container">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNavDropdown">
<ul class="navbar-nav ml-auto">
<li class="nav-item active"><a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a></li>
<li class="nav-item"><a class="nav-link" href="#">Features</a></li>
<li class="nav-item"><a class="nav-link" href="#">Pricing</a></li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown link</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
</ul>
</div>
</div>
</nav>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<script>
$(document).ready(function() {
$(window).scroll(function() {
if($(this).scrollTop() !== 0) {
$('.navbar').addClass('scrolled');
} else {
$('.navbar').removeClass('scrolled');
}
});
});
</script>
</body>
</html>

Does that work for you? I just replaced bootstrap.css source.
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
https://jsfiddle.net/z4e73gs8/
Because in this fiddle that works.
Maybe something wrong is with your bootstrap.css file?

Why won't bootstrap navbar menu show?

I'm very new to Bootstrap (and front end dev in general). I'm trying to get a Bootstrap4 navbar to work. I've essentially copied and pasted code from the bootstrap website, but I can't get it working.
When I shrink the page, the menu does collapse as it should. However, when I click on the collapsed menu, nothing happens. Also, on the expanded menu, nothing happens when I click the dropdown menu.
I've verified path to the boostrap.min.js is correct.
I'm loading this page file via "file://" in my browser, not off a server. I don't know if that could be a problem, but I wouldn't think so. Anyway, here is the code:
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="static/css/bootstrap.min.css" />
<script href="static/js/jquery-3.3.1.min.js"></script>
<script href="static/js/popper.min.js"></script>
<script href="static/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
</div>
</nav>
</body>
</html>
I'm sure it's something simple (I feel like the javascript isn't loading, for some reason), but I can't figure it out. Anybody see anything obvious?
Edit: I should also note that I don't see any Javascript errors in console, and I'm not sure I'm checking correctly, but it doesn't look like there are event listeners registered for the button (so nothing should happen when I click it).
Edit2: I just started a quick web server to load this from. None of the javascript files are being requested from the server. The main problem seems to be with the loading of the javascript files. Paths are correct, though.
Solved: The problem was I was using href for my script tags, instead of src. Changed to src and everything is working as expected.

Try the following code below for BootStrap4 Starter template. It will run anywhere just double click on the file. All source included from CDN.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="../../../../favicon.ico">
<title>Starter Template for Bootstrap</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<body>
<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarsExampleDefault">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu" aria-labelledby="dropdown01">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
<main role="main" class="container">
<div class="starter-template">
<h1>Bootstrap starter template</h1>
<p class="lead">Use this document as a way to quickly start any new project.<br> All you get is this text and a mostly barebones HTML document.</p>
</div>
</main><!-- /.container -->
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>
</html>

The attributes for the script tags were all wrong. I had href. It should be src. I fixed it and everything is working now.

Howto get content displayed in main section of html5 page using Bootstraps navbar

after spending days of my life searching a solution for problem above I try to ask here my first question hoping somebody could help me.
I am a newbie using bootstrap 4.0 which is normal quite easy ;-) but I am also a newbie in Javascript, however I like to develop my first own webpage in HTML5 with a simple layout like
- Header
- Main
- Footer
My decision was to use native Bootstrap no php, Typo3, Wordpress or anything else and I like DRY (Don't Repeat Yourself). If necessary for the solution my sample problem below maybe JS, jquery, ajax ... could be used but if possible no solution like using php etc. And I would no switch back to nav-tabs.
The main problem I have is how could I get the content of a external html-file loaded into the main area of the index.html file depending in the navbar items ? Means if I click in the navbar on Blog I would like to load the content from html/blog.html same for Action 1..3
Please notice html import is also not possible because Firefox has no plans to support it
Here is the simple coding with modification used from a original bootstrap example
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>My Testpage</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<header>
<!-- A header picture here -->
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<!-- <a class="nav-item active nav-link" href="#">Home <span class="sr-only">(current)</span></a>
<a class="nav-item nav-link" href="#" id="id_blog">Blog</a> -->
<a class="nav-item active nav-link" href="#" id="home" data-src="html/home.html">Home <span class="sr-only">(current)</span></a>
<a class="nav-item nav-link" href="#" id="blog" data-src="html/blog.html">Blog</a>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Dropdown </a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<!-- <a class="dropdown-item" href="#" id="id_action1">Action1</a>
<a class="dropdown-item" href="#" id="id_action2">Action2</a>
<a class="dropdown-item" href="#" id="id_action3">Action3</a>
-->
<a class="dropdown-item" href="#" id="act1" data-src="html/act1.html">Action1</a>
<a class="dropdown-item" href="#" id="act2" data-src="html/act2.html">Action2</a>
<a class="dropdown-item" href="#" id="act3" data-src="html/act3.html">Action3</a>
</div>
</li>
</ul>
</div>
</nav>
</header>
<body>
<main>
<div class="container-fluid">
<h1>My Testpage</h1>
<section id="content">
<!-- Content from other pages below html/ like loadpage.html should go in here -->
</section>
</main>
<footer class="footer" id="footer">
<!-- Some footer stuff here -->
</footer>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script>
// Initial load of the home content refrehed after each user action on url reload page action
$("#content").load("html/home.html");
// Pages to Load on click on Navbar menu
$("a").map( function(index, element) {
// console.log( index + " " + $(this).attr('id') + " " + $(this).attr('data-src') );
$(this).on("click", function() {
if( $(this).attr('data-src') !== undefined ) {
$("#content").load($(this).attr('data-src'));
}
});
});
</script>
<!-- Optional Solution, but more work, need to maintain each menu entry
<script>
$("#home").on("click", loadContent);
$("#blog").on("click", loadContent);
$("#act1").on("click", loadContent);
$("#act2").on("click", loadContent);
$("#act3").on("click", loadContent);
function loadContent(index, value){
$("#content").load($(this).attr('data-src'));
};
</script>
-->
</body>
</html>
Help is much appreciated

did you want this? try to click the home,blog and dropdown buttons.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>My Testpage</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<header>
<!-- A header picture here -->
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<a class="nav-item active nav-link" href="#" data-src="https://cn.bing.com/images/discover?form=Z9LH">Home <span class="sr-only">(current)</span></a>
<a class="nav-item nav-link" href="#" id="id_blog" data-src="https://www.bing.com/translator/">Blog</a>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Dropdown </a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#" data-src="https://outlook.live.com/owa/?WT.mc_id=O16_BingHP?mkt=en-US">Action1</a>
<a class="dropdown-item" href="#" data-src="https://cn.bing.com/videos/trending" id="id_action2">Action2</a>
<a class="dropdown-item" href="#" data-src="https://www.office.com/?WT.mc_id=O16_BingHP">Action3</a>
</div>
</li>
</ul>
</div>
</nav>
</header>
<body>
<main>
<div class="container-fluid">
<h1>My Testpage</h1>
<section id="content">
<!-- Content from other pages below html/ like loadpage.html should go in here -->
<iframe id="iframe" frameborder="0" width="100%" height="1000px" seamless scrolling="no"></iframe>
</section>
</div>
</main>
<footer class="footer" id="footer">
<!-- Some footer stuff here -->
</footer>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script>
window.onload = function() {
let frame = document.getElementById('iframe');
let frameSrc = document.querySelectorAll('a[data-src]');
frameSrc.forEach(function(ele) {
ele.addEventListener('click', function(event) {
console.log(event.target.getAttribute('data-src'));
frame.src = event.target.getAttribute('data-src');
}, false);
});
};
</script>
</body>
</html>

If you want to integrate three complete different websites/ webapps into one webpage you either need to use iframes or search for a complete other solution.
Using iframes is possible so it has some drawbacks. and that should not be security. That can be secured, especially within the same domain. You even can change the size of the iframe from within the iframe (you need some JS to exchange information to the outer page), so even a window resizing could be responsive up to the iframe.
The drawbacks of iframes are: no deep-links and during a page change within the iframe the scroll position of the outer page stay the same (so you will not start at the top of the iframe/ the top of the new loaded page, which is very irritating for greater forms.
I would prefer other solutions: where you can integrate all your functionality into one CMS. This should be easier to configure, update, maintain.

Categories