[英]Crop centered image inside div
I have a div containing an image (img) element, which extends for 100% width inside it. 我有一个包含图像(img)元素的div,它在其内部延伸100%宽度。 I would like to specify a maximum height for the div, and hide the parts of the image exceeding this height.
我想指定div的最大高度,并隐藏超过此高度的图像部分。 But I also want to keep this image centered vertically inside the div to show only its central part.
但我也想让这个图像垂直居中于div内,只显示它的中心部分。
For example, if browser width is 1200px and image aspect ratio is 4:3, image should display (1200x900)px. 例如,如果浏览器宽度为1200像素且图像宽高比为4:3,则应显示图像(1200x900)px。 But if we want to crop height to 300px only and center vertically, image should position at -300px inside the div (and the div should hide 0-300 and 600-900 of the image height).
但是如果我们想要将高度裁剪为仅300px并垂直居中,则图像应位于div内的-300px处(并且div应隐藏图像高度的0-300和600-900)。 Similar thoughts can be done for other widhts.
其他想法也可以做类似的想法。
I'm pretty sure this can be easily done with javascript, but I would like to know if there is a way to do it with CSS too. 我很确定这可以通过javascript轻松完成,但我想知道是否有办法用CSS也可以。 Thanks in advance!
提前致谢!
My take on this: http://codepen.io/vsync/pen/DpmnK 我对此的看法: http : //codepen.io/vsync/pen/DpmnK
<div class='box'>
<img src="http://www.biztalk360.com/Events/BizTalk-Innovation-day-2014-Norway/images/banner.jpg">
</div>
.box{
// this is the image container distentions
width:100%;
height:100px;
// The magic
> img{
position:absolute;
z-index:-1;
top:50%;
left:50%;
width:100%;
transform:translate(-50%, -50%);
&.max{ width:auto; height:100%; }
}
}
var photo = document.images[0],
container = document.querySelector('.box');
$(window).on('resize.coverPhoto', function(){
requestAnimationFrame(checkRatio);
});
function checkRatio(){
var state = photo.clientHeight <= container.clientHeight &&
photo.clientWidth >= container.clientWidth;
photo.classList[state ? 'add' : 'remove']('max');
}
You may want to look at this question : Resizeing an oversized image using overflow:hidden and keep the aspect ratio 您可能需要查看以下问题: 使用overflow:hidden调整超大图像的大小并保持纵横比
http://codepen.io/gcyrillus/pen/Grbxg http://codepen.io/gcyrillus/pen/Grbxg
.grid_3 { width:260px; margin:0 20px; float:left; text-align:center;
overflow:hidden;background:rgba(255,255,255,0.02);}
.grid_3 a {
display:block;
height:171px; border:solid 2px #FFFFFF;
line-height:168px;
overflow:hidden;
margin-bottom:10px;
}
.max-img-border { width:100%; margin:-100% 0;vertical-align:middle;
}
here is another pen , exploring this , vertical-align:middle and an image with virtually no height in the flux. 这是另一支笔,探索这个,垂直对齐:中间和一个几乎没有高度的图像。 http://codepen.io/gc-nomade/pen/DxCgv
http://codepen.io/gc-nomade/pen/DxCgv
Of course , image set in background center is easy if it has no meaning in your content. 当然,如果在您的内容中没有任何意义,在背景中心设置的图像很容易。
So you want the div to function as a viewing window for your image? 因此,您是否希望div用作图像的查看窗口? This sounds like image sprites (a large pic of icons put together where each icon is displayed individually) but with a larger image:
这听起来像图像精灵(每个图标单独显示的大图片放在一起),但图像更大:
http://www.w3schools.com/css/css_image_sprites.asp http://www.w3schools.com/css/css_image_sprites.asp
If you provide a JSFiddle, I can give you something more specific. 如果你提供一个JSFiddle,我可以给你一些更具体的东西。
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