On the PC side, no matter whether the page is fully opened or not, keep the footer at the bottom (no positioning required)-CSS Tutorial-php.cn

On the PC side, no matter whether the page is fully opened or not, keep the footer at the bottom (no positioning required)

青灯夜游

Oct 10, 2018 pm 04:22 PM

cssflexboxlayoutflexbox

I was writing a project recently, and some pages did not take up one screen, and the footer, which is the bottom, was close to it. This affected the appearance, so I searched online. Here are my results

The best way to solve this problem is to use an advanced layout model provided by CSS3: flexbox, which can create an adaptable layout.

Let’s start the code below

<body>
		<p id="header">...</p>
		<p id="content">...</p>
		<p class="footer">...</p>
	</body>

html{
    height: 100%;
}

body{
    display: flex;
    flex-direction: column;
    height: 100%;
}

#header{
   /* 我们希望 header 采用固定的高度，只占用必须的空间 */
   /* 0 flex-grow, 0 flex-shrink, auto flex-basis */
   flex: 0 0 auto;
}

#content{
   /* 将 flex-grow 设置为1，该元素会占用全部可使用空间 
      而其他元素该属性值为0，因此不会得到多余的空间*/
   /* 1 flex-grow, 0 flex-shrink, auto flex-basis */
   flex: 1 0 auto;
}

#footer{
   /* 和 header 一样，footer 也采用固定高度*/
   /* 0 flex-grow, 0 flex-shrink, auto flex-basis */
   flex: 0 0 auto;
}

We use flex-deraction: column to arrange the page structure vertically (flex is arranged horizontally by default), and at the same time, change the height of the html and body elements Set to 100% so it fills the entire screen.

The three attributes included in flex are used above. Let me introduce their uses:

flex-grow: elements in the same container have allocable space. Allocation ratio, and expansion ratio
flex-shrink: If there is insufficient space, the shrinkage ratio of the element
flex-basis: The expansion basis of the element The value

means that the header and footer only occupy the space they should occupy, and all the remaining space is given to the main content area

Okay, here, regardless of the page Regardless of whether the content is large or small, the footer can be ensured to stay at the bottom obediently.

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study. For more related tutorials, please visit CSS Video Tutorial, CSS3 Video Tutorial!

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