懸停時更改背景顏色

Question

我正在嘗試創建一個導航菜單，當我將鼠標懸停在某個項目上時，它將類似於下圖。 現在，盒子只用白色填充一半，但我想用白色填充整個li 。 我在油漆上畫了白線以顯示我要填充的內容

圖片http://oi63.tinypic.com/2wp2jix.jpg

CSS

.lefttabs {
    background-color: #1E1E1E;
    color: white;
    font-family: calibri;
    font-weight: bold;
    font-size: medium;
    width: 300px; 
    height: 100%;
    z-index: 1; /* Stay on top */
    padding-top: 60px; 
    /* Place content 60px from the top */
    transition: 0.5s; /* 0.5 second transition effect to slide in the sidenav */
}

.lefttabs a {
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s;
    font-size: medium;
    color: white;
    width: 133px;
    margin-left: 0;
    padding: 8px;
    text-decoration: none;
    line-height: 24px; 
}

.lefttabs ul {
    list-style: none;
    margin: 0 20px 0 0;
    border: 1px solid;
}

.lefttabs li {
    list-style: none; 
}

.lefttabs li a {
    list-style: none;
    display: block;
    padding: 0 0 30px 0;
    padding-left: 10px;
    padding-top: 10px; 
} 

.lefttabs a:hover {
    background-color: white;
    color: black;
}

.imga {
    width: 40px;
    height: 30px;
    margin-left: -21px;
    margin-right: 20px;
}

.lefttabs a imga {
    margin: 0 8px 0 0;
    vertical-align: middle;  /* needed */
}

HTML

<div class="lefttabs">
    <ul>
        <li>
            <a href=""><img class="imga" alt="dashboard" src="images/eve.bmp" border="0" />DASHBOARD</a>
        </li>
        <li>
            <a href=""><img class="imga" alt="Events" src="images/eve.bmp" border="0" />EVENTS</a>
        </li>
        <li> 
            <a href=""><img class="imga" alt="Vehicles" src="images/ve.bmp" border="0" />VEHICLES</a>
        </li>
    </ul>
</div>

Answer 1

嘗試這個

 .lefttabs { background-color: #1E1E1E; color: White; font-family: Calibri; font-weight: bold; font-size: medium; width: 300px; height: 100%; z-index: 1; /* Stay on top */ padding-top: 60px; /* Place content 60px from the top */ transition: 0.5s; /* 0.5 second transition effect to slide in the sidenav */ } .lefttabs a { font-size: 25px; color: #818181; display: block; transition: 0.3s; font-size: medium; color: White; width: 133px; margin-left: 0px; padding: 8px; text-decoration: none; line-height: 24px; } .lefttabs ul { list-style: none; margin: 0px; border: 1px solid; /* not border:1 px solid*/ padding: 0; /* add this*/ } .lefttabs li { list-style: none; } .lefttabs li a { list-style: none; display: block; padding: 10px 0px 30px 10px; /*padding-left: 10px;*/ /*padding-top: 10px;*/ width: 100%; /*add this*/ } .lefttabs a:hover { background-color: White; color: Black; } .imga { width: 40px; height: 30px; float: left; margin-right: 20px; } .lefttabs a imga { margin: 0 8px 0 0; vertical-align: middle; /* needed */ } 

 <div class="lefttabs"> <ul> <li> <a href=""> <img class="imga" alt="dashboard" src="images/eve.bmp" border="0" />DASHBOARD </a> </li> <li> <a href=""> <img class="imga" alt="Events" src="images/eve.bmp" border="0" />EVENTS </a> </li> <li> <a href=""> <img class="imga" alt="Vehicles" src="images/ve.bmp" border="0" />VEHICLES </a> </li> </ul> </div> 

Answer 2

如果您希望元素采用全角格式，則需要將其設置為display: block在CSS中display: block （如果它還不是block元素）。 此外，在ul上通常會使用默認margin並且在大多數瀏覽器中也會應用padding ，您也需要清除這些padding 。 以下是經過修改的CSS，包括其他一些更改...

  .lefttabs { background-color: #1e1e1e; color: white; font-family: Calibri; font-weight: bold; font-size: medium; width: 300px; height: 100%; z-index:1; /* Stay on top */ padding-top: 60px; /* Place content 60px from the top */ transition: 0.5s; /* 0.5 second transition effect to slide in the sidenav */ } .lefttabs a { font-size: 25px; color: #818181; display: block; transition: 0.3s; font-size:medium; color:White; margin-left: 0; padding: 8px; text-decoration: none; line-height: 24px; } .lefttabs ul { list-style:none; margin:0; border: 1px solid; padding: 0; } .lefttabs li { list-style:none; } .lefttabs li a { list-style:none; display:block; padding: 15px 20px; display: block; } .lefttabs a:hover { background-color: white; color: black; } .imga { display: inline-block; vertical-align: top; width: 40px; height: 30px; margin-right: 20px; margin-top: -3px; } .lefttabs a imga { margin: 0 8px 0 0; vertical-align: middle; /* needed */ } 

 <div class="lefttabs"> <ul > <li> <a href=""><img class="imga" alt="dashboard" src="images/eve.bmp" border="0" />DASHBOARD</a> </li> <li> <a href=""> <img class="imga" alt="Events" src="images/eve.bmp" border="0" />EVENTS</a> </li> <li> <a href=""> <img class="imga" alt="Vehicles" src="images/ve.bmp" border="0" />VEHICLES</a> </li> <ul> </div>