bootstrap drop down menu transparent button - html

Question

$(document).ready(function(){
$('.dropdown > button').mousedown(function(){
$(this).addClass('redClass');
$('.dropdown').addClass('redClass');
});
$('.dropdown > button').mouseup(function(){
$(this).removeClass('redClass');
$('.dropdown').removeClass('redClass');
});
$('.dropdown > button').click(function(){
$(this).addClass('redClass');
$('.dropdown').addClass('redClass');
});
$('.dropdown > button').mouseleave(function(){
$(this).addClass('redClass');
$('.dropdown').addClass('redClass');
});
})
/* Latest compiled and minified CSS included as External Resource*/
/* Optional theme */
#import url('//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css');
body {
margin: 10px;
}
.redClass {
background: transparent;
border: 1px solid transparent;
}
.transparentClass{
background: transparent;
border: 1px solid transparent;
}
<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/3.2.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="styles.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
<div class="dropdown">
<button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Home
<span class="caret"></span></button>
<ul class="dropdown-menu">
<li>About us</li>
</ul>
</div>
</div>
I want to design a bootstrap drop down for my angular2 application.I am running into issues.I want a single drop down menu when the user clicks the caret only.But even if I click outside the caret the dropdown menu shows.Another issue is I want both the menu and sub menu to have transparent color whether hovered or clicked.I tried the below css for hover and active,it didn't work.
.dropdown > button {
background-color: transparent;
}
<div class="dropdown">
<button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Home
<span class="caret"></span></button>
<ul class="dropdown-menu">
<li>About us</li>
</ul>
</div>

Answer 1

I think there is no way to select parent of an element with css. You can use jQuery to do that:
$(document).ready(function(){
$('.dropdown > button').mousedown(function(){
$(this).addClass('redClass');
$('.dropdown').addClass('redClass');
});
$('.dropdown > button').mouseup(function(){
$(this).removeClass('redClass');
$('.dropdown').removeClass('redClass');
});
})
.redClass {
background: #f00;
}
.transparentClass{
background: transparent;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="dropdown">
<button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Home
<span class="caret"></span></button>
<ul class="dropdown-menu">
<li>About us</li>
</ul>
</div>