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源代碼:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>Wfuyu教程(wfuyu.com)</title> 
<style>
.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 16px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}

.button1 {
    background-color: white; 
    color: black; 
    border: 2px solid #4CAF50;
}

.button1:hover {
    background-color: #4CAF50;
    color: white;
}

.button2 {
    background-color: white; 
    color: black; 
    border: 2px solid #008CBA;
}

.button2:hover {
    background-color: #008CBA;
    color: white;
}

.button3 {
    background-color: white; 
    color: black; 
    border: 2px solid #f44336;
}

.button3:hover {
    background-color: #f44336;
    color: white;
}

.button4 {
    background-color: white;
    color: black;
    border: 2px solid #e7e7e7;
}

.button4:hover {background-color: #e7e7e7;}

.button5 {
    background-color: white;
    color: black;
    border: 2px solid #555555;
}

.button5:hover {
    background-color: #555555;
    color: white;
}
</style>
</head>
<body>

<h2>鼠標懸停按鈕</h2>
<p>我們可以使用 :hover 選擇器來修改鼠標懸停在按鈕上的樣式。</p>
<p><strong>提示:</strong> 我們可以使用 <code>transition-duration</code> 屬性來設置 "hover" 效果的速度:</p>

<button class="button button1">Green</button>
<button class="button button2">Blue</button>
<button class="button button3">Red</button>
<button class="button button4">Gray</button>
<button class="button button5">Black</button>

</body>
</html>

運行結果：

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