使用CSS3变换后的溢出行为 [英] Overflow behavior after using CSS3 transform

问题描述

请检查

这里，我正在转换一个具有 .transformed 所以如果你看到，元素 transform 原始，但是下一个框不会向上移动，因为转换的元素占据流中的文字空间，它不会像 position：absolute; 但是，这是独立的概念。

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所以你需要使用 position：absolute; 或者你的 div 因此您会看到滚动条...

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Poopy IE兼容解决方案

正如你所说，好吧，是的，IE仍然会显示滚动条作为定位绝对的元素仍然存在于相同的维度，所以这里的锻炼是什么？




• 首先，你要转换的元素设置在父容器，因此第一个问题是如果你不需要 overflow 比为什么使用<$ c $> c> auto ？您可以使用隐藏。




• c>到父级，并且你期望将一些内容放在变换后的元素下面，而不是更好地将变换后的元素包裹在具有相同尺寸的另一个元素中设置为 overflow：hidden; ，并确保将 position：absolute; 属性移动到此块。 - 演示




• 如果仍然不开心吗？那么为什么 transform 整个元素？ transform 相关图片 - 演示

Please check the demo

I have two divs the first div is used for showing the scroll-bar and the second div is used for the rotation of inner contents of the div.

My question is why scroll-bar is showing even if there is no overflow of the inner contents.

Please check the demo and tell me what I am doing wrong here and how to overcome this issue or any alternative way to achieve this.

HTML

<div style="width: 1096px; height: 434px; overflow: auto; position: relative; border:solid 5px #555555">
    <div id="RotationDiv">
        <img style="left: 54px; top: 337px; width: 326px; height: 422px; position: absolute;" src="http://fc01.deviantart.net/fs70/f/2012/304/6/b/walfas_custom___vending_machine_2_by_grayfox5000-d5jljhe.png" />
    </div>
</div>

CSS

#RotationDiv {
    -ms-transform-origin: 539px 539px;
    -webkit-transform-origin: 539px 539px;
    width: 434px;
    height: 1096px;
    overflow: visible;
    -ms-transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    background-color:Red;
}

解决方案

You are using transform so it changes visual formatting model of an element.

From MDN:

The CSS transform property lets you modify the coordinate space of the CSS visual formatting model. Using it, elements can be translated, rotated, scaled, and skewed according to the values set.

A line again from MDN:

By modifying the coordinate space, CSS transforms change the position and shape of the affected content without disrupting the normal document flow. This guide provides an introduction to using transforms.

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From W3C : 2 Module Interactions

This module defines a set of CSS properties that affect the visual rendering of elements to which those properties are applied; these effects are applied after elements have been sized and positioned according to the Visual formatting model from [CSS21]. Some values of these properties result in the creation of a containing block, and/or the creation of a stacking context.

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So you have a parent element with the dimensions below.

width: 1096px; 
height: 434px;

Now you are transforming that element using

-webkit-transform: rotate(90deg);

So here, the element transforms visually, but not literally, in other words though you transform an element, it takes the space physically on a document just like a static element takes, it just visually transforms the element. I will share a diagram which will make you understand in a better way..

So though you transformed your element like this, but still the vertical space was taken up because of the height of your transformed element, which did transformed visually, but not literally...

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So, now what's the solution? Use position: absolute; on the child element, and anyways you are using position: relative; on the parent.

Demo

#RotationDiv {
    -ms-transform-origin: 539px 539px;
    -webkit-transform-origin: 539px 539px;
    width: 434px;
    height: 1096px;
    position: absolute;
    overflow: visible;
    -ms-transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    background-color:Red;
}

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Lets have a test case, I've the styles like below

.parent .transformed {
    height: 200px;
    width: 200px;
    background: #f00;
    -moz-transform: rotate(120deg);
    -webkit-transform: rotate(120deg);
    transform: rotate(120deg);
    -moz-transform-origin: 300px 300px;
    -webkit-transform-origin: 300px 300px;
    transform-origin: 300px 300px;
}

.parent .static {
    background: #00f;
    height: 200px;
    width: 200px;
}

Test Case

Here, I am transforming an element having class of .transformed so if you see, the element does transform and am also modifying the origin, but the next box won't move up, as the transformed element take up literal space in the flow, it doesn't get out of the flow like position: absolute; does, but well that's the separate concept.

So you need to use position: absolute; or your div will still take up space vertically and thus you see that scroll bar ...

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Poopy IE Compatible Solution

As you commented, well, yes, IE will still show the scroll bar as the element which is positioned absolute still exists in the same dimensions, so what's the workout here?

• Firstly, you are transforming the element to set in the parent container, also, you don't need the overflow so the first question is if you don't need overflow than why use auto? You can use hidden.

• If not hidden to the parent, and you are looking forward to place some content beneath the transformed element, than better you wrap the transformed element inside another element with the same dimensions set to overflow: hidden; and make sure you move the position: absolute; property to this block. - Demo

• If still not happy? Then why transform entire element? transform relevant image only - Demo

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