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htmlcssmegamenu

auto resize height of <ul> to fit contents

I want to create a mega menu that list items are left and when hover contents show right side. I use below html and css codes. html code:

<ul class="mega-menu">
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">laptop</span>digital</a>
        <ul class="mega-submenu">
            <li><a href="">phone</a></li>
            <li><a href="">mobile accessory</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
        </ul>
    </li>
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">home</span>home requirement</a>
        <ul class="mega-submenu">
            <li><a href="">tv</a></li>
            <li><a href="">Furniture</a></li>
            <li><a href="">Refrigerator</a></li>
        </ul>
    </li>
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">work</span>clothes</a>
        <ul class="mega-submenu">
            <li><a href="">Shirt</a></li>
            <li><a href="">T-shirt</a></li>
            <li><a href="">jacket</a></li>
        </ul>
    </li>
</ul>

css code:

ul{
    list-style: none;
}
a{
    text-decoration: none;
    color: black;
}
.mega-menu{
    position: relative;
    padding: 0;
    background-color: #e5e7f7;
    /*border: 1px solid red;*/
}
.has-mega-menu>a{
    display: block;
    width: 250px;
    padding: 0.6rem 0.5rem;
    color: #3c3227;
    box-sizing: border-box;
}
.has-mega-menu>a .icon{
    vertical-align: -4px;
    margin-right: 4px;
}
.mega-submenu{
    display:none;
    position: absolute;
    top: 0;
    /*bottom: 0;*/
    min-height: 100%;
    left:250px;
    right: 0;
    background-color: #ecf1f7;
    /*border: 1px solid green;*/
}
.has-mega-menu:hover .mega-submenu{
    display: block;
}

my problem is when one of the mega submenu has many content left items height is less than right contents. which css and html code i should add to set height of mega-menu base on it's contents?

Solution

  • Is this what you need?

    $( "li.has-mega-menu" ).hover(
  function() {
    var menuhight = $( this ).find( ".mega-submenu" ).height();
    console.log(menuhight);
    $( "#menu" ).css( "min-height", menuhight+"px" );
  }, function() {
     $( "#menu" ).css( "min-height", "100%");
  }
);
    ul{
    list-style: none;
}
a{
    text-decoration: none;
    color: black;
}

#menu {
background-color: #e5e7f7;
}
.mega-menu{
    position: relative;
    padding: 0;
    background-color: #e5e7f7;
    /*border: 1px solid red;*/

}
.has-mega-menu>a{
    display: block;
    width: 250px;
    padding: 0.6rem 0.5rem;
    color: #3c3227;
    box-sizing: border-box;
}
.has-mega-menu>a .icon{
    vertical-align: -4px;
    margin-right: 4px;
}
.mega-submenu{
    display:none;
    position: absolute;
    top: 0;
    /*bottom: 0;*/
    min-height: 100%;
    left:250px;
    right: 0;
    background-color: #ecf1f7;
    /*border: 1px solid green;*/
}
.has-mega-menu:hover .mega-submenu{
    display: block;
}
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="menu">
<ul class="mega-menu">
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">laptop</span>digital</a>
        <ul class="mega-submenu">
            <li><a href="">phone</a></li>
            <li><a href="">mobile accessory</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
        </ul>
    </li>
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">home</span>home requirement</a>
        <ul class="mega-submenu">
            <li><a href="">tv</a></li>
            <li><a href="">Furniture</a></li>
            <li><a href="">Refrigerator</a></li>
        </ul>
    </li>
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">work</span>clothes</a>
        <ul class="mega-submenu">
            <li><a href="">Shirt</a></li>
            <li><a href="">T-shirt</a></li>
            <li><a href="">jacket</a></li>
        </ul>
    </li>
</ul>
</div>

    $( "li.has-mega-menu" ).hover(
  function() {
    var menuhight = $( this ).find( ".mega-submenu" ).height();
    //console.log(menuhight);
    $( "#menu" ).css( "min-height", menuhight+"px" );
  }, function() {
     $( "#menu" ).css( "min-height", "100%");
  }
);
    ul{
    list-style: none;
}
a{
    text-decoration: none;
    color: black;
}

#menu {
background-color: #e5e7f7;
}
.mega-menu{
    position: relative;
    padding: 0;
    background-color: #e5e7f7;
    /*border: 1px solid red;*/

}
.has-mega-menu>a{
    display: block;
    width: 250px;
    padding: 0.6rem 0.5rem;
    color: #3c3227;
    box-sizing: border-box;
}
.has-mega-menu>a .icon{
    vertical-align: -4px;
    margin-right: 4px;
}
.mega-submenu{
    display:none;
    position: absolute;
    top: 0;
    /*bottom: 0;*/
    min-height: 100%;
    left:250px;
    right: 0;
    background-color: #ecf1f7;
    /*border: 1px solid green;*/
}
.has-mega-menu:hover .mega-submenu{
    display: block;
}
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="menu">
<ul class="mega-menu">
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">laptop</span>digital</a>
        <ul class="mega-submenu">
            <li><a href="">phone</a></li>
            <li><a href="">mobile accessory</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
            <li><a href="">computer</a></li>
        </ul>
    </li>
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">home</span>home requirement</a>
        <ul class="mega-submenu">
            <li><a href="">tv</a></li>
            <li><a href="">Furniture</a></li>
            <li><a href="">Refrigerator</a></li>
        </ul>
    </li>
    <li class="has-mega-menu"><a href=""><span class="material-icons icon">work</span>clothes</a>
        <ul class="mega-submenu">
            <li><a href="">Shirt</a></li>
            <li><a href="">T-shirt</a></li>
            <li><a href="">jacket</a></li>
        </ul>
    </li>
</ul>
</div>