Develop Reference

How can i put hover to the element in side bar?

I want to put hover into the element inside the sidebar that I already have.
I try to use hover ,but it seems not working. I appreciate every answer.
.sidebar .navbar .nav-link:hover{
color: #EFDBFF;
display: block;
background: white;
border-color: #EFDBFF;
}
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<header class="header row ">
<div class="d-flex justify-content-between">
<div id="logo" class="pb-2 ps-2 pe-0 col-2">
<img class="float-start py-2 ps-2 pe-2" src="assets/img/unknown.png">
<a href="#" class="sidebar-toggler flex-shrink-0" id="menu-toggle">
<i class="fa-solid fa-angle-left py-4 pe-2"></i>
</a>
</div>
</div>
</header>
<div class="body row ">
<div class="sidebar col-2 " id="sidebar">
<!--sidebar start-->
<div class="navbar-nav w-100">
<div class="nav-item dropdown">
<i class="fa fa-laptop me-2"></i>Admin
<div class="dropdown-menu bg-transparent border-0">
A
B
C
</div>
</div>
<i class="fa fa-th me-2"></i>Cập nhật PO
<i class="fa fa-keyboard me-2"></i>Phân loại PO
<i class="fa fa-chart-bar me-2"></i>Ước tính rebate
<i class="fa fa-tachometer-alt me-2"></i>Cập nhật rebate
<i class="fa fa-tachometer-alt me-2"></i>Báo cáo
<i class="fa fa-tachometer-alt me-2"></i>Tra cứu thông tin
<i class="fa fa-tachometer-alt me-2"></i>Hướng dẫn sử dụng
</div>
<!--sidebar end-->
</div>
<div class="content col-10"> Content
</div>
</div>
<script src="https://kit.fontawesome.com/60bf89e922.js" crossorigin="anonymous"></script>

your css selector is wrong
this will solve your problem
.sidebar .navbar-nav .nav-link:hover{
color: #EFDBFF;
display: block;
background: white;
border-color: #EFDBFF;
}

Is your css code connected to html?
Maybe nav-item class overrides. Use nav-link class with !important
More information: https://www.w3schools.com/css/css_important.asp

I see your selector is incorrect.
On your html you have navbar-nav so you'll have to use .navbar-nav on your selector.
your html
...
<!--sidebar start-->
<div class="navbar-nav w-100">
...
so the updated selector is
.sidebar .navbar-nav .nav-link:hover
.sidebar .navbar-nav .nav-link:hover{
color: #EFDBFF;
display: block;
background: white;
border-color: #EFDBFF;
}
That will solve the problem.

how to clear search result while click in search button

I made a song and a lyric searching page. The first time search is working well but while I click in the search button the previous result remains and also search results also shown on the page.
Now I want to disappear the result while searching for another song or lyric.
And also I want to make the search the result same style but I don't get results as I wanted.
const text = document.getElementById('text');
const search = document.getElementById('search');
const result = document.getElementById('result');
// api url
const api= 'https://api.lyrics.ovh';
// song lyrics
function getLyrics (artist, title) {
let url = `${api}/v1/${artist}/${title}`
fetch(url)
.then(res => res.json())
.then(singerLyrics => {
const lyrics = singerLyrics.lyrics;
const getLyric = document.getElementById('getLyric');
getLyric.innerHTML = `<h2 class="text-success mb-4">${artist} - ${title}</h2>
<pre class="lyric text-white">${lyrics}</pre>`;
});
result.innerHTML= '';
}
// search by song or artist
function searchSongs(term){
fetch(`${api}/suggest/${term}`)
.then(res => res.json())
.then (showData);
};
// search result
function showData (data) {
result.innerHTML = `<div class="single-result row align-items-center my-3 p-3">
<div class="col-md-9"> ${data.data.map(song => `<h3 class="lyrics-name">${song.title}</h3>
<p class="author lead">${song.type} by <span>${song.artist.name}</span></p>
</div>
<div class="col-md-3 text-md-right text-center">
<button onclick="getLyrics('${song.artist.name}','${song.title}')" class="btn btn-success">Get Lyrics</button>
</div>
</div>`)};
`;
};
//event listeners
search.addEventListener('click', function searchResult (){
const inputText = text.value.trim();
if (!inputText){
alert('this is not a song or artist')
}else {
searchSongs(inputText);
}
});
body{
background-color: #13141b;
color: #ffffff;
background-image: url(images/bg-image.png);
background-repeat: no-repeat;
background-size: 100%;
background-position: top;
}
.form-control{
background-color:rgba(255, 255, 255, 0.2);
padding: 22px;
border: none;
border-radius: 25px;
}
.btn{
border-radius: 1.5rem;
padding: 9px 20px;
}
.btn-privious{
background: rgba(255, 255, 255, 0.2);
color: #ffffff;
}
.navbar-toggler {
border: none;
}
.search-box{
position: relative;
}
.search-btn {
position: absolute;
top: 0;
right: 0;
height: 100%;
}
.single-result{
background: rgba(255, 255, 255, 0.2);
border-radius: 15px;
}
<!doctype html>
<html lang="en">
<head>
<title>Hard Rock Solution - Song Lyric App</title>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Favicon -->
<link rel="shortcut icon" href="favicon.ico" type="image/x-icon">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
<!-- Custom css -->
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="container">
<nav class="navbar navbar-dark my-3">
<a class="navbar-brand" href="#">
<img src="images/logo.png" alt="Hard Rock Solution">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavId" aria-controls="collapsibleNavId" aria-expanded="false" aria-label="Toggle navigation">
<img src="images/toggler-icon.svg" alt="">
</button>
<div class="collapse navbar-collapse" id="collapsibleNavId">
<ul class="navbar-nav ml-auto mt-2 mt-lg-0">
<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="dropdownId" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu" aria-labelledby="dropdownId">
<a class="dropdown-item" href="#">Action 1</a>
<a class="dropdown-item" href="#">Action 2</a>
</div>
</li>
</ul>
</div>
</nav>
<main class="content-area">
<div class="search-bar col-md-6 mx-auto">
<h1 class="text-center">Lyrics Search</h1>
<div class="search-box my-5">
<input id="text" type="text" class="form-control" placeholder="Enter your artist song name">
<button id="search" class="btn btn-success search-btn">Search</button>
</div>
</div>
<!-- === Simple results === -->
<div class="d-flex justify-content-center">
<div id="result" class="">
</div>
<!-- Single Lyrics -->
<div id="getLyric" id="artistTitle" class="single-lyrics text-center">
</div>
</div>
</main>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<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>
<!-- Custom Script Here -->
<script src ="javascrpt.js"> </script>
</body>
</html>

try to use autocomplete="off" like
<input type="text" name="foo" autocomplete="off" />

Every time, search is clicked, the lyrics container should be emtpied:
document.querySelector("#getLyric").childNodes.forEach(el => el.remove())
to fix the issue, add this to your script:
document.querySelector("#search").addEventListener('click', function () {
document.querySelector("#getLyric").innerHTML = '';
})

Create a good drop&drag function

I have 2 bordered space for tools and free-space (droppable-area). And this tool-space includes some shapes that can draggable, also droppable to free-space. But there is little bug...
When the figure drops to the free-space, some slide events happen. First of all, it happens after dropping any figure, then if we drag dropped figures, they affect each other with definite slides.
If you run below code on your computer and try this drop events you will understand my problem.
Any help would be greatly appreciated, thanks!
$(function() {
$( ".draggable-item" ).draggable({ revert: "invalid" });
$(".droppable-area").droppable({
drop: function(event, ui) {
$(this).append(ui.draggable);
}
});
} );
.tool-space{
border: 10px double #005580;
min-height: 608px;
}
.free-space{
border: 10px solid #005580;
min-height: 608px;
}
.doitcenter{
text-align: center;
}
.close-button{
font-size: 24px;
cursor: pointer;
}
.shapes{
opacity: 0.8;
margin-bottom: 10px;
}
.shapes:hover{
cursor: move;
opacity: 1;
}
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>jQuery UI Draggable - Default functionality</title>
<script src="https://kit.fontawesome.com/6e2154b1f7.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-2">
<div class="tool-space">
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item">
<span onclick="this.parentNode.style.display = 'none';" class="close-button">×</span>
<i class="far fa-square fa-2x shapes"></i>
</span>
</div>
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item">
<span onclick="this.parentNode.style.display = 'none';" class="close-button">×</span>
<i class="far fa-circle fa-2x shapes"></i>
</span>
</div>
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item">
<span onclick="this.parentNode.style.display = 'none';" class="close-button">×</span>
<i class="far fa-square fa-2x shapes"></i>
</span>
</div>
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item">
<span onclick="this.parentNode.style.display = 'none';" class="close-button">×</span>
<i class="far fa-circle fa-2x shapes"></i>
</span>
</div>
</div>
</div>
<div class="col-10">
<div class="free-space droppable-area">
</div>
</div>
</div>
</div>
</body>
</html>

Largely the issue is that when the item is Dropped, Draggable has assigned top and left CSS values to the item. I suspect some other CSS is causing this to work based off some relative position inside the free-space.
You might consider using UI .position() to correct this.
$(function() {
$(".doitcenter").draggable({
revert: "invalid",
handle: ".shapes"
});
$(".droppable-area").droppable({
drop: function(event, ui) {
ui.draggable.appendTo(this).position({
my: "center center-5",
at: "center",
of: event
});
}
});
$(".free-space").on("click", ".close-button", function(e) {
$(this).closest(".doitcenter").remove();
});
});
.tool-space {
border: 10px double #005580;
min-height: 608px;
}
.free-space {
border: 10px solid #005580;
min-height: 608px;
}
.free-space .doitcenter {
width: 40px;
}
.doitcenter {
text-align: center;
}
.close-button {
font-size: 24px;
cursor: pointer;
}
.shapes {
opacity: 0.8;
margin-bottom: 10px;
}
.shapes:hover {
cursor: move;
opacity: 1;
}
<script src="https://kit.fontawesome.com/6e2154b1f7.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<div class="container">
<div class="row">
<div class="col-2">
<div class="tool-space">
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item"><span class="close-button">×</span><i class="far fa-square fa-2x shapes"></i></span>
</div>
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item"><span class="close-button">×</span><i class="far fa-circle fa-2x shapes"></i></span>
</div>
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item"><span class="close-button">×</span><i class="far fa-square fa-2x shapes"></i></span>
</div>
<div class="ui-widget-content doitcenter mt-2">
<span class="draggable-item"><span class="close-button">×</span><i class="far fa-circle fa-2x shapes"></i></span>
</div>
</div>
</div>
<div class="col-10">
<div class="free-space droppable-area">
</div>
</div>
</div>
</div>
See More: https://jqueryui.com/position/

Bootstrap 4 - On screen 3 images in row with 80% height of screen

I have couple of questions about site, which I'm making with help of Bootstrap 4. I would like to make simple page just using on screen space (no scroll except mobile version) with logo in the upper middle of the page, full width navbar and then 2 rows of 3 full width images, which would be cropped as resolution allows. Here is the sketch. I made some HTML/CSS proposals, but they didn't work properly. Do you have some ideas how to make it? :/
Thanks a lot!
<!DOCTYPE html>
<html lang ="cs">
<head>
<meta charset="utf-8">
<!-- Mobile adaptation -->
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- Page information -->
<meta name="description" content="GeoExpo Eshop. Od replik přes zkameněliny do trilobitů.">
<meta name="keywords" content="eshop zoo, eshop Zoo Praha, GeoExpo, zkameněliny, suvenýry, repliky, šutry, kameny">
<meta name="author" content="Ondřej Sloup">
<!-- Mine Stylesheet -->
<link rel="stylesheet" href="stylesheet/stylesheet.css">
<!-- Imported Stylesheets -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">
<script defer src="https://use.fontawesome.com/releases/v5.0.4/js/all.js"></script>
<!-- Scripts (jQuery) -->
<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-beta.3/js/bootstrap.min.js" integrity="sha384-a5N7Y/aK3qNeh15eJKGWxsqtnX/wWdSZSKp+81YjTmS15nvnvxKHuzaWwXHDli+4" crossorigin="anonymous"></script>
<!-- Tittle -->
<title>Geo Expo</title>
</head>
<body>
<header>
<img class="logo d-block img-fluid mx-auto" src="./logo/PNG.png" alt="Logo" />
</header>
<nav class="navbar navbar-expand-lg">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#Toogle" aria-controls="Toogle" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"><i class="fa fa-bars mx-auto" aria-hidden="true"></i></span>
</button>
<div class="collapse navbar-collapse" id="Toogle">
<ul class="navbar-nav mt-2 mt-lg-0 mx-auto">
<li class="nav-item">
<a class="nav-link" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Repliky</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Unikáty</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Instalace</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Kontakt</a>
</li>
</ul>
</div>
</nav>
<main class="container-fluid p-0">
<div class="row align-items-center no-gutters">
<div class="col-4">
<img class="image" width="auto" src="./images/bridge.jpg" alt="Bridge">
</div>
<div class="col-4">
<img class="image" width="auto" src="./images/park.jpg" alt="Park">
</div>
<div class="col-4">
<img class="image" width="auto" src="./images/tunnel.jpg" alt="Tunnel">
</div>
</div>
<div class="row align-items-center no-gutters">
<div class="col-4">
<img class="image" width="auto" src="./images/bridge.jpg" alt="Bridge">
</div>
<div class="col-4">
<img class="image" width="auto" src="./images/park.jpg" alt="Park">
</div>
<div class="col-4">
<img class="image" width="auto" src="./images/tunnel.jpg" alt="Tunnel">
</div>
</div>
</main>
And CSS
/*INSERT*/
#import url('https://fonts.googleapis.com/css?family=Cinzel+Decorative');
#import url('https://fonts.googleapis.com/css?family=Cinzel');
/*ALL*/
html, body, main {
height: 100% !important;
max-width: 100% !important;
}
body {
background: grey !important;
}
/*Header*/
header {
height: 15%;
}
.logo {
display: inline-block;
padding: 1rem 0 .5rem 0 !important;
}
/*Images*/
.row {
height: 30% !important;
}
/* NavBar */
nav {
font-size: 13pt;
font-family: 'Cinzel', sans-serif;
padding: .3rem 0 .3rem 0 !important;
text-transform: capitalize;
}
.nav-link {
color: #fff !important;
margin: 0 25% 0 25%;
}
.nav-link:hover {
font-style: underline;
}

For future, you can use the http://shoelace.io/
That being said, your html code should look like this:
<div class="container">
<div class="row Logo">
<div class="col-sm-3">
<!-- This is where you should put your logo image -->
</div>
</div>
<div class="row Menu">
<div class="col-sm-12">
<!-- this is where your menu goes in -->
</div>
</div>
<div class="row Images">
<div class="col-sm-4">
<!-- your first image -->
</div>
<div class="col-sm-4">
<!-- your second image -->
</div>
<div class="col-sm-4">
<!-- your third image -->
</div>
<div class="col-sm-4">
<!-- your forth image -->
</div>
<div class="col-sm-4">
<!-- your fifth image -->
</div>
<div class="col-sm-4">
<!-- your last image -->
</div>
</div>
</div>
Also, have a look at the bootstrap layout page https://getbootstrap.com/docs/4.0/layout/grid/

How to change glyph icon color on hover inside div tag?

I want to show different color to glyph icon on hover.
This is my code:
<div class="col-xs-3 col-lg-3 text-center span-hover" style="height:50px;border-right: 1px solid #fff;" data-target="#myCarousel" data-slide-to="1">
<span class="glyphicon glyphicon-globe"></span>
<span class="hidden-xs"> TRADING</span>
</div>
css
.span-hover:hover {
background-color: rgba(0,0,0,0.4);
color:white;
}
.glyphicon
{
font-size: 25px;
color:red;
}
.glyphicon:hover
{
color:#44c5ff;
}
When user place the cursor on div tag,Now it's only changing text color.But I want to change text color:white and at the same time glyph icon color:#44c5ff;
.glyphicon:hover it's working when user exactyly place cursor on glyphicon. But not in div tag.
Thanks

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<style>
.glyphicon:hover{
color:#44c5ff;
font-size:30px;
}
</style>
</head>
<body>
<div class="container">
<h2>Glyphicon Examples</h2>
<p>Envelope icon: <span class="glyphicon glyphicon-envelope"></span></p>
<p>Envelope icon as a link:
<a href="#">
<span class="glyphicon glyphicon-envelope"></span>
</a>
</p>
<p>Search icon: <span class="glyphicon glyphicon-search"></span></p>
<p>Search icon on a button:
<button type="button" class="btn btn-default">
<span class="glyphicon glyphicon-search"></span> Search
</button>
</p>
<p>Search icon on a styled button:
<button type="button" class="btn btn-info">
<span class="glyphicon glyphicon-search"></span> Search
</button>
</p>
<p>Print icon: <span class="glyphicon glyphicon-print"></span></p>
<p>Print icon on a styled link button:
<a href="#" class="btn btn-success btn-lg">
<span class="glyphicon glyphicon-print"></span> Print
</a>
</p>
</div>
</body>
</html>
Try It Once

.span-hover:hover {
background-color: rgba(0,0,0,0.4);
color:white;
}
.glyphicon
{
font-size: 25px;
color:red;
}
.glyphicon:hover
{
color:#44c5ff;
}
.span-hover:hover .glyphicon{
color:#44c5ff;
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<div class="col-xs-3 col-lg-3 text-center span-hover" style="height:50px;border-right: 1px solid #fff;" data-target="#myCarousel" data-slide-to="1">
<span class="glyphicon glyphicon-globe"></span>
<span class="hidden-xs"> TRADING</span>
</div>
try this snippet. and you can use this type of hover
.span-hover:hover .glyphicon{
color:#44c5ff;
}