Can a background image be larger than the div itse

2019-01-31 02:40发布

I have a footer div with 100% width. It's about 50px high, depending on its content.

Is it possible to give that #footer a background image that kind of overflows this div?

The image is about 800x600px, and I want it to be positioned in the left bottom corner of the footer. It should work sort of like a background image for my website, but I've already set a background image on my body. I need another image positioned at the bottom left corner of my website and the #footer div would be perfect for that.

#footer {
    clear: both;
    width: 100%;
    margin: 0;
    padding: 30px 0 0;
    background:#eee url(images/bodybgbottomleft.png) no-repeat left bottom fixed;
}

The image is set to the footer, however it doesn't overflow the div. Is it possible to make that happen?

overflow:visible doesn't do the job!

9条回答
爷的心禁止访问
2楼-- · 2019-01-31 02:50

There is a very easy trick. Set padding of that div to a positive number and margin to negativ

#wrapper {
     background: url(xxx.jpeg);
     padding-left: 10px;
     margin-left: -10px;
}
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家丑人穷心不美
3楼-- · 2019-01-31 02:53

Use trasform: scale(1.1) property to make bg image bigger, move it up with position: relative; top: -10px;

<div class="home-hero">
    <div class="home-hero__img"></div>
</div>

.home-hero__img{
 position:relative;
    top:-10px;
    transform: scale(1.1);
    background: {
        size: contain;
        image: url('image.svg');
    }
}
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▲ chillily
4楼-- · 2019-01-31 02:56

Not really - the background image is bounded by the element it's applied to, and the overflow properties only apply to the content (i.e. markup) within an element.

You can add another div into your footer div and apply the background image to that, though, and have that overflow instead.

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Animai°情兽
5楼-- · 2019-01-31 03:03

You can use a css3 psuedo element as shown in this article

https://www.exratione.com/2011/09/how-to-overflow-a-background-image-using-css3/

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甜甜的少女心
6楼-- · 2019-01-31 03:05

You mention already having a background image on body.

You could set that background image on html, and the new one on body. This will of course depend upon your layout, but you wouldn't need to use your footer for it.

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干净又极端
7楼-- · 2019-01-31 03:06

No, you can't.

But as a solid workaround, I would suggest to classify that first div as position:relative and use div::before to create an underlying element containing your image. Classified as position:absolute you can move it anywhere relative to your initial div.

Don't forget to add content to that new element. Here's some example:

div {
  position: relative;
}    

div::before {
  content: ""; /* empty but necessary */
  position: absolute;
  background: ...
}

Note: if you want it to be 'on top' of the parent div, use div::after instead.

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