Menú de acordeón multinivel con HTML simple & CSS

Vista prévia

Descripción

Un enfoque simple de HTML5/CSS3 para hacer un menú de acordeón deslizante multinivel a partir de listas HTML anidadas. Utiliza casillas de verificación + etiquetas para alternar los menús jerárquicos y varias propiedades CSS3 para efectos deslizantes suaves.

Funcionamiento

Incluye el Font awesome 4 para los iconos de alternancia de menú.

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">

Cree un menú de acordeón de 3 niveles siguiendo la estructura de marcado como esta:

<nav class="nav" role="navigation">

<ul class="nav__list">


<li>



<input id="group-1" type="checkbox" hidden />



<label for="group-1"><span class="fa fa-angle-right"></span> First level</label>



<ul class="group-list">




<li><a href="#">1st level item</a></li>




<li>





<input id="sub-group-1" type="checkbox" hidden />





<label for="sub-group-1"><span class="fa fa-angle-right"></span> Second level</label>





<ul class="sub-group-list">






<li><a href="#">2nd level nav item</a></li>






<li><a href="#">2nd level nav item</a></li>






<li><a href="#">2nd level nav item</a></li>






<li>







<input id="sub-sub-group-1" type="checkbox" hidden />







<label for="sub-sub-group-1"><span class="fa fa-angle-right"></span> Third level</label>







<ul class="sub-sub-group-list">








<li><a href="#">3rd level nav item</a></li>








<li><a href="#">3rd level nav item</a></li>








<li><a href="#">3rd level nav item</a></li>







</ul>






</li>





</ul>




</li>



</ul>


</li>


<li>



<input id="group-2" type="checkbox" hidden />



<label for="group-2"><span class="fa fa-angle-right"></span> First level</label>



<ul class="group-list">




<li>





<li><a href="#">1st level item</a></li>





<li><a href="#">1st level item</a></li>





<input id="sub-group-2" type="checkbox" hidden />





<label for="sub-group-2"><span class="fa fa-angle-right"></span> Second level</label>





<ul class="sub-group-list">






<li><a href="#">2nd level nav item</a></li>






<li><a href="#">2nd level nav item</a></li>






<li>







<input id="sub-sub-group-2" type="checkbox" hidden />







<label for="sub-sub-group-2"><span class="fa fa-angle-right"></span> Third level</label>







<ul class="sub-sub-group-list">








<li><a href="#">3rd level nav item</a></li>







</ul>






</li>





</ul>




</li>



</ul>


</li>


<li>



<input id="group-3" type="checkbox" hidden />



<label for="group-3"><span class="fa fa-angle-right"></span> First level</label>



<ul class="group-list">




<li>





<li><a href="#">1st level item</a></li>





<li><a href="#">1st level item</a></li>





<input id="sub-group-3" type="checkbox" hidden />





<label for="sub-group-3"><span class="fa fa-angle-right"></span> Second level</label>





<ul class="sub-group-list">






<li><a href="#">2nd level nav item</a></li>






<li><a href="#">2nd level nav item</a></li>






<li><a href="#">2nd level nav item</a></li>






<li>







<input id="sub-sub-group-3" type="checkbox" hidden />







<label for="sub-sub-group-3"><span class="fa fa-angle-right"></span> Third level</label>







<ul class="sub-sub-group-list">








<li><a href="#">3rd level nav item</a></li>








<li><a href="#">3rd level nav item</a></li>








<li><a href="#">3rd level nav item</a></li>







</ul>






</li>





</ul>




</li>



</ul>


</li>


<li>



<input id="group-4" type="checkbox" hidden />



<label for="group-4"><span class="fa fa-angle-right"></span> First level</label>



<ul class="group-list">




<li>





<li><a href="#">1st level item</a></li>





<input id="sub-group-4" type="checkbox" hidden />





<label for="sub-group-4"><span class="fa fa-angle-right"></span> Second level</label>





<ul class="sub-group-list">






<li><a href="#">2nd level nav item</a></li>






<li><a href="#">2nd level nav item</a></li>





</ul>




</li>



</ul>


</li>

</ul>
</nav>

Estilo de los elementos de menú de nivel superior.

.nav a, .nav label {

display: block;

padding: .85rem;

color: #fff;

background-color: #151515;

box-shadow: inset 0 -1px #1d1d1d;

-webkit-transition: all .25s ease-in;

transition: all .25s ease-in;
}

.nav a:focus, .nav a:hover, .nav label:focus, .nav label:hover {

color: rgba(255, 255, 255, 0.5);

background: #030303;
}

.nav label { cursor: pointer; }

Estilo de elementos de submenú.

/**
 * Styling first level lists items
 */

.group-list a, .group-list label {

padding-left: 2rem;

background: #252525;

box-shadow: inset 0 -1px #373737;
}

.group-list a:focus, .group-list a:hover, .group-list label:focus, .group-list label:hover { background: #131313; }

/**
 * Styling second level list items
 */

.sub-group-list a, .sub-group-list label {

padding-left: 4rem;

background: #353535;

box-shadow: inset 0 -1px #474747;
}

.sub-group-list a:focus, .sub-group-list a:hover, .sub-group-list label:focus, .sub-group-list label:hover { background: #232323; }

/**
 * Styling third level list items
 */

.sub-sub-group-list a, .sub-sub-group-list label {

padding-left: 6rem;

background: #454545;

box-shadow: inset 0 -1px #575757;
}

.sub-sub-group-list a:focus, .sub-sub-group-list a:hover, .sub-sub-group-list label:focus, .sub-sub-group-list label:hover { background: #333333; }

/**
 * Hide nested lists
 */

.group-list, .sub-group-list, .sub-sub-group-list {

height: 100%;

max-height: 0;

overflow: hidden;

-webkit-transition: max-height .5s ease-in-out;

transition: max-height .5s ease-in-out;
}

.nav__list input[type=checkbox]:checked + label + ul { /* reset the height when checkbox is checked */
max-height: 1000px; }

Icono de Chevron giratorio en la palanca.

label > span {

float: right;

-webkit-transition: -webkit-transform .65s ease;

transition: transform .65s ease;
}

.nav__list input[type=checkbox]:checked + label > span {

-webkit-transform: rotate(90deg);

-ms-transform: rotate(90deg);

transform: rotate(90deg);
}