将div的高度设置为基于可见区域

Question

在以下HTML中，我手动将中间div的高度设置为200px。如何自动调整高度以使div的高度等于浏览器中可见区域的高度？这可以用纯CSS完成还是需要JavaScript？

<p>Scroll Up and Down this page to see the parallax scrolling effect.</p> 

<div class="parallax"></div> 

<div class="red"> 
Scroll Up and Down this page to see the parallax scrolling effect. 
This div is just here to enable scrolling. 
Tip: Try to remove the background-attachment property to remove the scrolling effect. 
</div> 

而CSS：

.parallax { 
    /* The image used */ 
    background-image: url("http://az-themes.bluxart.netdna-cdn.com/ibuki/wp-content/uploads/2014/06/blog-img.jpg"); 

    /* Set a specific height */ 
    height: 200px; 

    /* Create the parallax scrolling effect */ 
    background-attachment: fixed; 
    background-position: center; 
    background-repeat: no-repeat; 
    background-size: cover; 

} 

.red { 
    height:1000px; 
    background-color:red; 
    color:white; 
    font-size: 40px; 
} 

工作呢例子可以发现here。

Answer 1

为此使用vh单位 - 因此200px变为100vh以填充屏幕的整个高度。

但请确保您包含min-height，对于您的内容超过视口可以显示的时间。

至于此兼容性：

http://caniuse.com/#feat=viewport-units

火狐：因为火狐19（2013）

铬支持：由于部分地支持，因为铬20（2012）中，由于铬26总支持（2013）

Safari：自从Safari 6（2012）以来的部分支持，自Safari 6.1（2013）以来的全面支持

IE：因为IE 9（2011年）的部分支持

封边：封边以来12（2015）

当我说的部分支持，在所有这些情况下，他们不支持vmax，部分支持，无论如何，你并没有使用它。

.parallax { 
 
    /* The image used */ 
 
    background-image: url("http://az-themes.bluxart.netdna-cdn.com/ibuki/wp-content/uploads/2014/06/blog-img.jpg"); 
 
    /* Set a specific height */ 
 
    height: 100vh; 
 
    /* Create the parallax scrolling effect */ 
 
    background-attachment: fixed; 
 
    background-position: center; 
 
    background-repeat: no-repeat; 
 
    background-size: cover; 
 
} 
 
.red { 
 
    height: 1000px; 
 
    background-color: red; 
 
    color: white; 
 
    font-size: 40px; 
 
}

<p>Scroll Up and Down this page to see the parallax scrolling effect.</p> 
 

 
<div class="parallax"></div> 
 

 
<div class="red"> 
 
    Scroll Up and Down this page to see the parallax scrolling effect. This div is just here to enable scrolling. Tip: Try to remove the background-attachment property to remove the scrolling effect. 
 
</div>

你也可以做到这一点使用jQuery，使用.height()得到窗口的高度。

$(document).ready(function() { 
 

 
    wh = $(window).height(); 
 

 
    $(".parallax").css({ 
 
    "height": wh 
 
    }); 
 

 
});

.parallax { 
 
    /* The image used */ 
 
    background-image: url("http://az-themes.bluxart.netdna-cdn.com/ibuki/wp-content/uploads/2014/06/blog-img.jpg"); 
 
    /* Set a specific height */ 
 
    height: 100vh; 
 
    /* Create the parallax scrolling effect */ 
 
    background-attachment: fixed; 
 
    background-position: center; 
 
    background-repeat: no-repeat; 
 
    background-size: cover; 
 
} 
 
.red { 
 
    height: 1000px; 
 
    background-color: red; 
 
    color: white; 
 
    font-size: 40px; 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<p>Scroll Up and Down this page to see the parallax scrolling effect.</p> 
 

 
<div class="parallax"></div> 
 

 
<div class="red"> 
 
    Scroll Up and Down this page to see the parallax scrolling effect. This div is just here to enable scrolling. Tip: Try to remove the background-attachment property to remove the scrolling effect. 
 
</div>