删除正文和页脚 html 之间的怪异 space

Question

我是 HTML5 和 CSS3 的新手，对 flexbox 更是如此。请帮我删除正文和页脚之间不需要的 space。

我在 Whosebug 和 google 中四处查看，但没有任何效果。他们都建议检查我的保证金，我确实检查了所有这些但无济于事。已尝试为大多数 div 调整边距、填充和边框，但我仍然找不到问题所在。

Chrome:

index.html

<body>
    <div>
        <ul class="header flex-container">
            <li class="nav flex-item">About</li>
            <li class="nav flex-item">Links</li>
            <li class="nav flex-item">Contact</li>
        </ul>
    </div>


    <div class="content flex-container">
        <div class="sidebar flex-item">Sidebar</div>
        <div class="main flex-item">
        This is the content<br />
        This is the content<br />
        This is the content<br />
        This is the content<br />
        </div>
        <div class="sidebar flex-item">Sidebar</div>
    </div>
</body>
<footer>footer here</footer>

style.css

body{
    margin: 0px;
    font-family: sans-serif;
}

.flex-container{
    /* flexbox properties*/
    display: -webkit-flex;
    -webkit-flex-direction: row;
}

.flex-item{
    /*flexbox properties*/
    display: -webkit-flex;
    align-items: center;
    justify-content: center;
}

.header{
    height: 50px;
    background-color: tomato;
    margin: 0;
    border-bottom: 3px solid rgba(0,0,0,0.3);
}

ul{
    justify-content: flex-end;
}

.nav{
    flex-direction: row;
    margin: 2px;
    padding: 0 10px 0 10px;
    background-color: rgba(0,0,0,0.2);
    color: white;
}

.content{
    height: 300px;
    margin: 0;
}

.sidebar{
    background-color: grey;
    flex: 1;
}    

.main{
    background-color: lightgrey;
    flex: 2;
}

footer{
    height: 50px;
    border-top: 3px solid rgba(0,0,0,0.3);
    background-color: tomato;
}

Edit: This is what I get in Firefox. Also, moved the footer inside body tag, as suggested in one of the comments.

Edit 2: I copied my code to Codepen and saw these weird characters. When I deleted them, it solved my problem. But looking at my editor (I tried Sublime and Notepad++ already), there's no special characters!!! This is driving me crazy.

Answer 1

请试试这个。正文和页脚之间不需要 space，因为在 div 末尾可以看到一些虚线字符，即 (................)

body{
    margin: 0px;
    font-family: sans-serif;
}

.flex-container{
    /* flexbox properties*/
    display: -webkit-flex;
    -webkit-flex-direction: row;
}

.flex-item{
    /*flexbox properties*/
    display: -webkit-flex;
    align-items: center;
    justify-content: center;
}

.header{
    height: 50px;
    background-color: tomato;
    margin: 0;
    border-bottom: 3px solid rgba(0,0,0,0.3);
}

ul{
    justify-content: flex-end;
}

.nav{
    flex-direction: row;
    margin: 2px;
    padding: 0 10px 0 10px;
    background-color: rgba(0,0,0,0.2);
    color: white;
}

.content{
    height: 300px;
    margin: 0;
}

.sidebar{
    background-color: grey;
    flex: 1;
}    

.main{
    background-color: lightgrey;
    flex: 2;
}

footer{
    height: 50px;
    border-top: 3px solid rgba(0,0,0,0.3);
    background-color: tomato;
}

<body>
    <div>
        <ul class="header flex-container">
            <li class="nav flex-item">About</li>
            <li class="nav flex-item">Links</li>
            <li class="nav flex-item">Contact</li>
        </ul>
    </div>


    <div class="content flex-container">
        <div class="sidebar flex-item">Sidebar</div>
        <div class="main flex-item">
        This is the content<br />
        This is the content<br />
        This is the content<br />
        This is the content<br />
        </div>
        <div class="sidebar flex-item">Sidebar</div>
    </div>
</body>
<footer>footer here</footer>

Answer 2

这是您的 html 的问题 Look into this screenshot problem is with you html try using footer inside your body tag

Here is the working fiddle

<body>
    <div>
        <ul class="header flex-container">
            <li class="nav flex-item">About</li>
            <li class="nav flex-item">Links</li>
            <li class="nav flex-item">Contact</li>
        </ul>
    </div>


    <div class="content flex-container">
        <div class="sidebar flex-item">Sidebar</div>
        <div class="main flex-item">
        This is the content<br />
        This is the content<br />
        This is the content<br />
        This is the content<br />
        </div>
        <div class="sidebar flex-item">Sidebar</div>
    </div>
    <footer>footer here</footer>
</body>

删除正文和页脚 html 之间的怪异 space

remove weird space between body and footer html

html

css

header

margin

footer