I'm using bootstrap 5.
In my navbar I want show menus horizantally like inserted picture.
show horizantally sub menus like this picture
I want to use submenu for other sub menus 4 level.
How should I do this?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>horizantally sub menus</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-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">
<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="#">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-bs-toggle="dropdown" aria-expanded="false">
Dropdown link
</a>
<ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
</body>
</html>
Here you go with a solution https://jsfiddle.net/1s75buv9/5/
var pos = parseInt($('.linedUp').closest('.dropdown').position().left);
calcWidth = function(){
setTimeout(function(){
var width = 0;
var maxWidth = $(document).width() - pos;
$('.linedUp li').each(function(){
width += parseInt($(this).outerWidth()) + 2;
if( maxWidth < width){
width -= parseInt($(this).outerWidth());
}
});
$('.linedUp').css({
width: width
});
}, 0);
}
.linedUp > li{
display: inline;
float: left;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<nav class="navbar navbar-default navbar-inverse" role="navigation">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span>
</button> <a class="navbar-brand" href="#">Brand</a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active">
Link
</li>
<li>
Link
</li>
<li class="dropdown">
Dropdown<strong class="caret"></strong>
<ul class="dropdown-menu linedUp">
<li>
Action
</li>
<li>
Action 2
</li>
<li>
Something else here
</li>
<li>
Separated link
</li>
<li>
One more separated link
</li>
</ul>
</li>
</ul>
</div>
</nav>
I created using li, then calculated the width dynamically.
Edit:
To add an extra level of submenu, simply add .dropdown-submenu to any li in an existing dropdown menu.
For example:
<ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
...
<li class="dropdown-submenu">
<a tabindex="-1" href="#">More options</a>
<ul class="dropdown-menu">
...
</ul>
</li>
</ul>
You can further refer to Official Bootstrap Website for more on navbars!
Related
This navbar contains dropdown menus that don't work while converting from Bootstrap v5.2.2 to v5.2.3. It does not dropdown, instead staying still. Can someone explain what I am doing wrong?
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.2.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
<div id="page">
<header>
<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
<div class="container-fluid">
<a class="navbar-brand" href="/">AT Products LLC</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="collapsibleNavbar">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="/">AT Products</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown">Products</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="/paid">Paid Services</a></li>
<li><a class="dropdown-item" href="/flash">Flash Documentation</a></li>
<li><a class="dropdown-item" href="/sms">SMS Bomb</a></li>
<li><a class="dropdown-item" href="/mdickie">MDickie Projects</a></li>
<li><a class="dropdown-item" href="/bxpp">BxPP</a></li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
</header>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
You didn't change the bundled javascript:
<!-- JavaScript Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.2.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-kenU1KFdBIe4zVF0s0G1M5b4hcpxyD9F7jL+jjXkk+Q2h455rYXK/7HAuoJl+0I4" crossorigin="anonymous"></script>
<html lang="en">
<head>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.2.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
<script src="/static/purecookie.js"></script>
</head>
<body>
<div id="page">
<header>
<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
<div class="container-fluid">
<a class="navbar-brand" href="/">AT Products LLC</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="collapsibleNavbar">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="/">AT Products</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown">Products</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="/paid">Paid Services</a></li>
<li><a class="dropdown-item" href="/flash">Flash Documentation</a></li>
<li><a class="dropdown-item" href="/sms">SMS Bomb</a></li>
<li><a class="dropdown-item" href="/mdickie">MDickie Projects</a></li>
<li><a class="dropdown-item" href="/bxpp">BxPP</a></li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
</header>
</div>
<!-- JavaScript Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.2.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-kenU1KFdBIe4zVF0s0G1M5b4hcpxyD9F7jL+jjXkk+Q2h455rYXK/7HAuoJl+0I4" crossorigin="anonymous"></script>
</body>
</html>
I get the impression that you simply updated the version in your CDN code. That won't work. The integrity key must match the actual file. You can see the error in the browser console:
Failed to find a valid digest in the 'integrity' attribute for resource
Make sure you copy the new code from the CDN.
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap#5.2.3/dist/css/bootstrap.min.css" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
<div id="page">
<header>
<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
<div class="container-fluid">
<a class="navbar-brand" href="/">AT Products LLC</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="collapsibleNavbar">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="/">AT Products</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown">Products</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="/paid">Paid Services</a></li>
<li><a class="dropdown-item" href="/flash">Flash Documentation</a></li>
<li><a class="dropdown-item" href="/sms">SMS Bomb</a></li>
<li><a class="dropdown-item" href="/mdickie">MDickie Projects</a></li>
<li><a class="dropdown-item" href="/bxpp">BxPP</a></li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
</header>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.2.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-kenU1KFdBIe4zVF0s0G1M5b4hcpxyD9F7jL+jjXkk+Q2h455rYXK/7HAuoJl+0I4" crossorigin="anonymous"></script>
I'm having a little trouble with my navbar, using bootstrap 5. The navbar doesn't collapse after expanding and the dropdown list doesn't drop.
<!-- Bootstrap-5 -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
<!-- Body -->
<nav class="navbar navbar-expand-md bg-light sticky-top">
<div class="container-fluid ">
<a class="navbar-brand" href="#"><img class="" width="100px" src="icons/cake/Asset 4.png"></a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar">
<span class="fa fa-navicon"></span>
</button>
<div class="collapse navbar-collapse justify-content-end" id="collapsibleNavbar">
<ul class="navbar-nav">
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" href="#">SERVICES</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Delivery</a></li>
<li>
<a class="dropdown-item" href="#">Event Planning</a>
</li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link" href="#">CONTACT</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#"><button class="btn btn-danger">ORDER ONLINE</button></a>
</li>
</ul>
</div>
</div>
</nav>
Many of Bootstrap's components require the use of JavaScript to function. Including navbars and dropdowns. I added the relevant source for both font-awesome and the Bootstrap JS.
Read more here on Bootstrap 5 Introduction.
<head>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<nav class="navbar navbar-expand-md bg-light sticky-top">
<div class="container-fluid ">
<a class="navbar-brand" href="#"><img class="" width="100px" src="icons/cake/Asset 4.png"></a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar">
<span class="fa fa-navicon"></span>
</button>
<div class="collapse navbar-collapse justify-content-end" id="collapsibleNavbar">
<ul class="navbar-nav">
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" href="#">SERVICES</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Delivery</a></li>
<li>
<a class="dropdown-item" href="#">Event Planning</a>
</li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link" href="#">CONTACT</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#"><button class="btn btn-danger">ORDER ONLINE</button></a>
</li>
</ul>
</div>
</div>
</nav>
I have been using bootstrap in projects very smoothly, but then in one angular project, its navbar toggler icon button is appearing but not showing the nav items on clicking the button.
<div>
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<div class="container">
<a class="navbar-brand" href="#">Admin Header</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive"
aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarResponsive">
<ul class="navbar-nav ml-auto">
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./home">Home
<span class="sr-only">(current)</span>
</a>
</li>
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./about">About</a>
</li>
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./services">Services</a>
</li>
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./contact">Contact</a>
</li>
<li class=" btn-primary nav-item text-white" role="button">
<a class="nav-link text-white" (click)="logOut()" >logout</a>
</li>
</ul>
</div>
</div>
</nav>
</div>
This is the Navbar result:
On decreasing the width of the browser we have results something like this:
below is the code of index.html:
But on clicking on this button I am not able to see any nav items.
Works perfectly fine, you must be missing some script files.
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<title>Hello, world!</title>
</head>
<body>
<div>
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<div class="container">
<a class="navbar-brand" href="#">Admin Header</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarResponsive">
<ul class="navbar-nav ml-auto">
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./home">Home
<span class="sr-only">(current)</span>
</a>
</li>
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./about">About</a>
</li>
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./services">Services</a>
</li>
<li class="nav-item" routerLinkActive="active">
<a class="nav-link" routerLink="./contact">Contact</a>
</li>
<li class=" btn-primary nav-item text-white" role="button">
<a class="nav-link text-white" (click)="logOut()">logout</a>
</li>
</ul>
</div>
</div>
</nav>
</div>
<!-- JavaScript -->
<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://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>
</html>
I try to use bootstrap navbar and write below code :
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarGeneral" aria-controls="navbarGeneral" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarGeneral">
<ul class="nav navbar-nav">
<li class="nav-item ">
<a href="http://localhost:8080/" class="nav-link">Home
</a>
</li>
<li class="nav-item active">
<a href="http://localhost:8080/bootstrap5" class="nav-link">bootstrap5
</a>
</li>
<li class="nav-item">
<a href="http://localhost:8080/home4" class="nav-link">home4
</a>
</li>
<li class="nav-item dropdown">
<a href="http://localhost:8080/LoginPage" class="nav-link dropdown-toggle" data-bs-toggle="dropdown" role="button" aria-expanded="false">LoginPage
</a>
<ul class="dropdown-menu">
<li class="nav-item ">
<a href="http://localhost:8080/LoginPage/Bootstrap-34" class="dropdown-item">Bootstrap 3.4
</a>
</li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
when clicking on the login page get an error that
Uncaught DOMException: Failed to execute 'querySelector' on
'Document': 'http://localhost:8080/LoginPage' is not a valid selector.
What is problem?
Jsfiddle
It's not working to toggle the dropdown because the anchor tag is attempting to navigate. Remove the url from the href...
<li class="nav-item dropdown">
<a href="#" class="nav-link dropdown-toggle"
data-bs-toggle="dropdown"
role="button" aria-expanded="false">LoginPage</a>
<ul class="dropdown-menu">
<li class="nav-item ">
Bootstrap
</li>
</ul>
</li>
Note to future readers: Most Bootstrap 5 "dropdown not working" questions are caused by failing to use the new data-bs- attributes
Use this and Let me know if it works
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
<script src="https://code.jquery.com/jquery-3.1.0.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.0.0-beta1/dist/js/bootstrap.bundle.min.js?cdv=40" type="text/javascript"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.0-beta1/dist/css/bootstrap.min.css?cdv=40" type="text/css" rel="stylesheet"/>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarGeneral" aria-controls="navbarGeneral" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarGeneral">
<ul class="nav navbar-nav">
<li class="nav-item ">
<a href="http://localhost:8080/" class="nav-link">Home
</a>
</li>
<li class="nav-item active">
<a href="http://localhost:8080/bootstrap5" class="nav-link">bootstrap5
</a>
</li>
<li class="nav-item">
<a href="http://localhost:8080/home4" class="nav-link">home4
</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
LoginPage
</a>
<ul class="dropdown-menu" aria-labelledby="navbarDropdown">
<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>
</ul>
</div>
</div>
</nav>
</body>
</html>
<nav class="navbar navbar-expand-lg navbar-expand-md sticky-top">
<div class="container-fluid">
<a class="navbar-brand" href="index.html">Website </a>
<button class="navbar-toggle collapsed " data-toggle="collapse" data-target="#navbarNavDropdown" aria-expanded="false">
<i class="fa fa-bars"></i>
</button>
<div class="collapse navbar-collapse justify-content-end" id="navbarNavDropdown">
<ul class="nav navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="index.html"> Home </a>
</li>
<li class="nav-item">
<a class="nav-link" href="link1.html"> Link1</a>
</li>
<li class="nav-item">
<a class="nav-link" href="link2.html"> Link2</a>
</li>
</ul>
</div>
</div>
</nav>
The button which is supposed to show up only when window is resized to small size, is always showing on the right of the Website name. It is looking ugly in fullscreen, that is, while viewing in computer mode. I want to remove it from showing in high resolution devices. Tell me where am I making mistake.
Because the correct class name for the Bootstrap 4 Navbar is navbar-toggler, not navbar-toggle.
<nav class="navbar navbar-light navbar-expand-lg navbar-expand-md sticky-top">
<div class="container-fluid">
<a class="navbar-brand" href="index.html">Website </a>
<button class="navbar-toggler" data-toggle="collapse" data-target="#navbarNavDropdown" aria-expanded="false">
<i class="fa fa-bars"></i>
</button>
<div class="collapse navbar-collapse justify-content-end" id="navbarNavDropdown">
<ul class="nav navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="index.html"> Home </a>
</li>
<li class="nav-item">
<a class="nav-link" href="link1.html"> Link1</a>
</li>
<li class="nav-item">
<a class="nav-link" href="link2.html"> Link2</a>
</li>
</ul>
</div>
</div>
</nav>
https://www.codeply.com/go/9uKT2H0EgP
Only use class navbar-expand-sm if you want the icon to show up only on narrow viewports. Find an overview in the documentation. Also you use a wrong class for the hamburger icon: class="navbar-toggler", like
Zim already said.
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<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">
<title>Hello, world!</title>
</head>
<body>
<nav class="navbar navbar-expand-sm navbar-dark bg-dark">
<a class="navbar-brand" href="#">Expand at sm</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExample03" aria-controls="navbarsExample03" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarsExample03">
<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="https://example.com" id="dropdown03" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu" aria-labelledby="dropdown03">
<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-md-0">
<input class="form-control" type="text" placeholder="Search">
</form>
</div>
</nav>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>