Ce sunt dropdown-urile?

Meniurile derulante sunt utilizate în CSS pentru a ascunde o listă predefinită într-un buton.

Exemple:

<div class="dropdown">
  <button class="dropbtn">Name</button>
  <div class="dropdownContent">
    <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#">One</a>
    <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#">Two</a>
    <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#">Three</a>
  </div>
</div>

Apoi, ar trebui să personalizați clasele în CSS astfel:

.dropdown {
  position: relative;
  display: inline-block;
}

.dropbtn {
  background-color: red;
  padding: 10px;
}

.dropdown-content {
  display: none;
  position: absolute;
}

.dropdown:hover .dropdown-content {
  display:block;
}

Aveți nevoie de clasele div separate pentru a crea butonul și de un alt div pentru a separa lista conținutului butonului.

Un exemplu

<div id="container">
  
        <div id="myNav1" class="overlay">
  
            <div class="overlay-content" id="myNav1-content">
  
                <div>
                    <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#" id="list1_obj1" class="list1" >Content 1</a>
                </div>
                <div>
                    <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#" id="list1_obj2" class="list1" >Content 2</a>
                </div>
  
            </div>
  
         </div>
  
         <div id="myNav2" class="overlay">
  
             <a href="javascript:void(10)" class="closebtn" onclick="closeNav()">&times</a>
            <div class="overlay-content" id="myNav2-content">
  
                <div>
                    <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#" id="list2_obj1" class="list2" >Content 3</a>
                </div>
                <div>
                   <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#" id="list2_obj2" class="list2" >Content 4</a>
                </div>
                <div>
                  <a href="https://www.freecodecamp.org/news/css-dropdown-guide-how-to-make-a-dropdown-menu-in-css/#" id="list2_obj3" class="list2" >Content 5</a>
                </div>
  
            </div>
  
         </div>
  
 </div>
#myNav1 {
    height: 0;
    width: 50%;
    position: fixed;
    z-index: 6;
    top: 0;
    left: 0;
    background-color: #ffff;
    overflow: hidden;
    transition: 0.3s;
    opacity: 0.85;
}

#myNav2 {
    height: 0;
    width: 50%;
    position: fixed;
    z-index: 6;
    bottom: 0;
    right: 0;
    background-color: #ffff;
    overflow: hidden;
    transition: 0.3s;
    opacity: 0.85;
}

.overlay-content {
    position: relative;
    width: 100%;
    text-align: center;
    margin-top: 30px;
}

#myNav1-content{
    top: 12%;
    left: 5%;
    display: none;
}

#myNav2-content{
    top: 12%;
    right: 10%;
    display: none;   
}

Mai multe informații despre meniurile drop-down CSS:

  • Cum se creează un meniu derulant cu CSS și JavaScript