如何让这个菜单占据剩余空间的所有宽度？
有一个菜单：
<div id="divmenuppal"> // this the menu
<ul class="dropdown">
<li class="menuppal"><a href="#">Administration</a>
<ul>
<li><a href="#">Artificial Turf</a></li>
<li>
<a href="#">Batting Cages</a>
<ul>
<li><a href="#">Indoor</a>
<ul>
<li><a href="#">Garden</a></li>
</ul>
</li>
<li><a href="#">Outdoor</a></li>
</ul>
</li>
<li><a href="#">Benches & Bleachers</a></li>
<li><a href="#">Communication Devices</a></li>
<li><a href="#">Dugouts</a></li>
<li><a href="#">Fencing & Windscreen</a></li>
<li><hr></li>
<li><a href="#">Floor Protectors</a></li>
<li><a href="#">Foul Poles</a></li>
<li><a href="#">Netting</a></li>
<li><a href="#">Outdoor Furniture</a></li>
<li><a href="#">Outdoor Signs</a></li>
<li><hr></li>
<li><a href="#">Padding</a></li>
<li><a href="#">Scoreboards</a></li>
<li><a href="#">Shade Structures</a></li>
<li><a href="#"> - VIEW ALL - </a></li>
</ul>
</li>
<li class="menuppal"><a href="#">Structure</a>
<ul>
<li><a href="#">All-in-One Team Cart</a></li>
<li><a href="#">Air & Electrical Reels</a></li>
<li><a href="#">Field Drags</a></li>
<li>
<a href="#">Field Marking Equipment</a>
<ul>
<li><a href="#">Batter's Box Templates</a></li>
<li><a href="#">Dryline Markers</a></li>
<li><a href="#">Field Paint</a>
<ul>
<li><a href="#">Garden</a></li>
</ul>
</li>
<li><a href="#">Field Sprayers</a></li>
<li><a href="#">Stencils</a></li>
</ul>
</li>
<li>
<a href="#">Field Tarps</a>
<ul>
<li><a href="#">Area Tarps</a></li>
<li><a href="#">Growth Covers / Protectors</a></li>
<li><a href="#">Infield Tarps</a></li>
<li><a href="#">Tarp Accessories</a></li>
</ul>
</li>
<li><a href="#">Hand Tools</a></li>
<li>
<a href="#">Irrigation, Hoses, Nozzles</a>
<ul>
<li><a href="#">Hoses & Hose Reels</a></li>
<li><a href="#">Irrigation</a></li>
<li><a href="#">Nozzles</a></li>
</ul>
</li>
<li><a href="#">Layout Tools</a></li>
<li><a href="#">Moisture Removal</a></li>
<li><hr></li>
<li><a href="#">Mound Fortification</a></li>
<li><a href="#">Mowers & Stripers</a></li>
<li><a href="#">Soil Management</a></li>
<li><a href="#">Soil Amendments</a></li>
<li><a href="#">Spreaders & Sweepers</a></li>
<li><a href="#"> - VIEW ALL - </a></li>
</ul>
</li>
<li class="menuppal"><a href="#">Exercice</a>
<ul>
<li>
<a href="#">Baseball - Softball</a>
<ul>
<li><a href="#">Base Accessories</a></li>
<li><a href="#">Bases & Home Plates</a></li>
<li><a href="#">Game Accessories</a></li>
<li><a href="#">Pitching Rubbers</a></li>
</ul>
</li>
<li>
<a href="#">Batting Practice Equipment</a>
<ul>
<li><a href="#">Backstops</a></li>
<li><a href="#">Infield Screens</a></li>
<li><a href="#">Jugs Pitching Machines</a></li>
<li><a href="#">Turf Mats</a></li>
<li><a href="#">Turf Protectors</a></li>
<li><a href="#">Replacement Accessories</a></li>
</ul>
</li>
<li>
<a href="#">Batting Cages</a>
<ul>
<li><a href="#">Indoor</a></li>
<li><a href="#">Outdoor</a></li>
</ul>
</li>
<li>
<a href="#">Portable Mounds</a>
<ul>
<li><a href="#">Batting Practice Mounds</a></li>
<li><a href="#">Game Mounds</a></li>
<li><a href="#">Practice Mounds</a></li>
</ul>
</li>
<li>
<a href="#">Football</a>
<ul>
<li><a href="#">First Down Markers</a></li>
<li><a href="#">Football Accessories</a></li>
<li><a href="#">Football Goalposts</a></li>
</ul>
</li>
<li>
<a href="#">Soccer</a>
<ul>
<li><a href="#">Soccer Goals</a></li>
<li><a href="#">Soccer Accessories</a></li>
</ul>
</li>
<li><a href="#"> - VIEW ALL - </a></li>
</ul>
</li>
<li class="menuppal"><a href="#">Contribuables et biens</a>
<ul>
<li><a href="#">Ladders & Sticks</a></li>
<li><a href="#">Hurdles</a></li>
<li><a href="#">Training Accessories</a></li>
<li><a href="#">Smart-Cart Training System</a></li>
<li><a href="#">Smart-Hurdle Collection</a></li>
<li><a href="#"> - VIEW ALL - </a></li>
</ul>
</li>
<li class="menuppal"><a href="#">Recettes</a>
<ul>
<li><a href="#">Field Design</a></li>
<li><a href="#">Turf Management</a></li>
<li><a href="#">Training</a></li>
<li><a href="#"> - VIEW ALL - </a></li>
</ul>
</li>
<li class="menuppal"><a href="#">Edition</a>
<ul>
<li><a href="#">Field Design</a></li>
<li><a href="#">Turf Management</a></li>
<li><a href="#">Training</a></li>
<li><a href="#"> - VIEW ALL - </a></li>
</ul>
</li>
<li class="menuppal"><a href="#">Outils</a>
<ul>
<li><a href="#">Field Design</a></li>
<li><a href="#">Turf Management</a></li>
<li><a href="#">Training</a></li>
<li><a href="#"> - VIEW ALL - </a></li>
</ul>
</li>
</ul>
</div>
<div class="breadcrumbs" style="clear:left;"> // this is the breadcrumbs
<div class="container-fluid">
<ul class="bread">
<li><a href="http://localhost/impots/index.php?action=Accueil" target="_self">Accueil</a></li><li><a href="http://localhost/impots/contribuable.php?action=ContriGererContribuable" target="_self">Gestion des contribuables</a></li><li><a>Fiche d'un contribuable</a></li>
</ul>
<ul class="bread pull-right">
<li style="color: #000;padding: 5px;font-size: 11px;font-weight: bold;">Fiche d'un contribuable</li>
</ul>
</div>
</div>
菜单的CSS：
* {
margin: 0;
padding: 0;
}
body {
font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
}
a {
text-decoration: none;
font-size: 11px;
font-weight: 100;
width: 100%;
box-sizing: border-box;
}
ul {
list-style: none;
}
ul.dropdown ul {
width: 220px;
visibility: hidden;
position: absolute;
background-color: #40617C;
}
ul.dropdown li:not(.menuppal):not(:first-child):not(:last-child)
{
margin-top: 8px;
margin-bottom: 8px;
}
hr {
margin-left: 6px;
margin-right: 8px;
border-top: 0;
}
/*
LEVEL ONE : MAIN MENU
*/
ul.dropdown {
position: relative;
}
ul.dropdown li.menuppal {
float: left;
zoom: 1;
background: #000 url(../images/menuLight.png) repeat-x top left;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-left: 1px solid #222;
}
ul.dropdown li.menuppal a {
display: block;
padding: 4px 8px;
color: #000000;
}
/* Doesn't work in IE */
ul.dropdown li.menuppal:hover {
background: #ccc url('../images/menuDark.png') repeat-x 50% 50%;
position: relative;
}
/*
FIN LEVEL ONE
*/
/*
LEVEL TWO
*/
ul.dropdown ul {
top: 100%;
left: 0;
}
ul.dropdown ul li {
float: none;
position: relative;
}
/* IE 6 & 7 Needs Inline Block */
ul.dropdown li.menuppal ul li a {
border-right: none;
color: #FFF;
display: inline-block;
}
ul.dropdown li.menuppal ul li a:hover {
background: #07243a;
}
ul.dropdown li.menuppal ul li a:visited {
word-break: break-all;
}
/*
LEVEL THREE
*/
ul.dropdown ul ul {
left: 100%;
top:0!important;
}
/*
LEVEL FOUR
*/
ul.dropdown ul ul ul {
left: 100%;
top:0!important;
}
ul.dropdown li:hover > ul {
visibility: visible;
}
在运行时，菜单不占用所有水平空间：
那么如何使菜单填充剩余的空间，如下图所示：
3 个答案:
答案 0 :(得分：1)
ul.dropdown {
background: #000 url(../images/menuLight.png) repeat-x top left;
}
答案 1 :(得分：0)
使用flex布局。我将以下代码添加到CSS的底部，它就是这样做的：
#divmenuppal > .dropdown {
display: flex;
}
.dropdown .menuppal:last-child {
flex-grow: 1;
}
答案 2 :(得分：0)
好的，我是从@SunilDalal的回答中找到的：
ul.dropdown {
position: relative;
float: left;
width: 100%;
background: #000 url('menuLight.png') repeat-x top left;
}
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