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CSS implements first-level navigation bar

Mar 22, 2018 pm 01:04 PM

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This time I will bring you CSS to implement a first-level navigation bar. What are the precautions for implementing a first-level navigation bar with CSS? The following is a practical case, let’s take a look.

Step one: Introduce the css style sheet, create a new layer with the id nav, and use the <ul>, <li>, <a> tags to create the complete effect.

&lt;!DOCTYPE html&gt;
&lt;html&gt;
    &lt;head&gt;
        &lt;meta charset=&quot;UTF-8&quot;&gt;
        &lt;title&gt;&lt;/title&gt;
        &lt;link rel=&quot;stylesheet&quot; type=&quot;text/css&quot; href=&quot;css/yiji.css&quot;/&gt;
    &lt;/head&gt;
    &lt;body&gt;
        &lt;p id=&quot;nav&quot;&gt;
            &lt;ul&gt;
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
            &lt;/ul&gt;
        &lt;/p&gt;
    &lt;/body&gt;
&lt;/html&gt;

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The second step is to set the CSS style:

1. Set the attributes of nav

#nav{
    width: 500px;
    height: 50px;
    border: 1px solid red;
}

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The display effect is as follows:

##2. Clear the dot in front of the <ul> tag

#nav ul{
    list-style: none;
}

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3. Set the properties of the <a> tag contained under <ul>

#nav ul li a{
    width: 98px;
    height: 50px;
    float: left;
    border: 1px solid red;
    text-align: center;
    line-height: 50px;
    text-decoration: none;
}

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4 .Set the mouse over effect

#nav ul li a:hover{
    background-color: #ABCDEF;
}

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Final effect:

Complete HTML code part ：

&lt;!DOCTYPE html&gt;
&lt;html&gt;
    &lt;head&gt;
        &lt;meta charset=&quot;UTF-8&quot;&gt;
        &lt;title&gt;&lt;/title&gt;
        &lt;link rel=&quot;stylesheet&quot; type=&quot;text/css&quot; href=&quot;css/yiji.css&quot;/&gt;
    &lt;/head&gt;
    &lt;body&gt;
        &lt;p id=&quot;nav&quot;&gt;
            &lt;ul&gt;
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                 
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                 
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                 
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
                 
                &lt;li&gt;&lt;a href=&quot;&quot;&gt;首页&lt;/a&gt;&lt;/li&gt;
            &lt;/ul&gt;
        &lt;/p&gt;
    &lt;/body&gt;
&lt;/html&gt;

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Complete the CSS style code part:

*{
    margin: 0;
    padding: 0;
}
#nav{
    width: 500px;
    height: 50px;
    border: 1px solid red;
    margin: 30px;
}
#nav ul{
    list-style: none;
}
#nav ul li a{
    width: 98px;
    height: 50px;
    float: left;
    border: 1px solid red;
    text-align: center;
    line-height: 50px;
    text-decoration: none;
}
#nav ul li a:hover{
    background-color: #ABCDEF;
}

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other php Chinese websites related articles!