如何自动调整图像大小以适合"div"容器? [英] How do I auto-resize an image to fit a 'div' container?

问题描述

您如何自动调整大图像的大小，以使其适合较小的div容器，同时保持其宽高比?

How do you auto-resize a large image so that it will fit into a smaller width div container whilst maintaining its width:height ratio?

示例:stackoverflow.com-当将图像插入到编辑器面板中且图像太大而无法容纳在页面上时，图像将自动调整大小.

Example: stackoverflow.com - when an image is inserted onto the editor panel and the image is too large to fit onto the page, the image is automatically resized.

推荐答案

请勿对图片标签应用明确的宽度或高度.相反，给它:

Do not apply an explicit width or height to the image tag. Instead, give it:

max-width:100%;
max-height:100%;

此外，如果仅想指定宽度，则为height: auto;.

Also, height: auto; if you want to specify a width only.

示例: http://jsfiddle.net/xwrvxser/1/

img {
    max-width: 100%;
    max-height: 100%;
}

.portrait {
    height: 80px;
    width: 30px;
}

.landscape {
    height: 30px;
    width: 80px;
}

.square {
    height: 75px;
    width: 75px;
}

Portrait Div
<div class="portrait">
    <img src="http://i.stack.imgur.com/xkF9Q.jpg">
</div>

Landscape Div
<div class="landscape">
    <img src="http://i.stack.imgur.com/xkF9Q.jpg">
</div>

Square Div
<div class="square">
    <img src="http://i.stack.imgur.com/xkF9Q.jpg">
</div>

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