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概述

 resize CSS 属性允许你控制一个元素的可调整大小性。

初始值none
适用元素elements with overflow other than visible, and optionally replaced elements representing images or videos, and iframes
是否是继承属性
适用媒体visual
计算值as specified
Animation typediscrete
正规顺序the unique non-ambiguous order defined by the formal grammar

语法

/* Keyword values */
resize: none;
resize: both;
resize: horizontal;
resize: vertical;
resize: block;
resize: inline;

/* Global values */
resize: inherit;
resize: initial;
resize: unset;

取值

none
元素不能被用户缩放。
both
允许用户在水平和垂直方向上调整元素的大小。
horizontal
允许用户在水平方向上调整元素的大小。
vertical
允许用户在垂直方向上调整元素的大小。
block
Depending on the writing-mode and direction value, the element displays a mechanism for allowing the user to resize the element either horizontally or vertically in block direction.
inline
Depending on the writing-mode and direction value, the element displays a mechanism for allowing the user to resize the element either horizontally or vertically in inline direction.
Note: 如果一个block元素的 overflow 属性被设置成了visible,那么resize属性对该元素无效。

标准语法

none | both | horizontal | vertical

例子

Disabling resizability of textareas

CSS

<textarea> 元素在Gecko 2.0 (Firefox 4)中默认是可以进行缩放的. 你可以通过下面的CSS代码来重写这种行为:

textarea.example {
  resize: none; /* disables resizability */
}

HTML

<textarea class="example">Type some text here.</textarea>

Result

Using resize with arbitrary elements

You can use the resize property to make any element resizable. In the example below, a resizable <div> box contains a resizable paragraph (<p> element):

CSS

.resizable {
  resize: both;
  overflow: scroll;
  border: 1px solid black;
}

div {
  height: 300px;
  width: 300px;
}

p {
  height: 200px;
  width: 200px;
}

HTML

<div class="resizable">
  <p class="resizable">
    This paragraph is resizable, because the CSS resize property is set to 'both' on this
    element.
  </p>
</div>

Result

Specifications

Specification Status Comment
CSS Logical Properties Level 1
resize
Editor's Draft Adds the values block and inline.
CSS Basic User Interface Module Level 3
resize
Candidate Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (on <textarea>) 1.0 4.0 (2.0)-moz 未实现 12.1 3.0 (522)
On any block-level and replaced element, table cell, and inline block element (unless overflow is visible) 4.0 5.0 (5.0)[1] 未实现 15 4.0
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support (on <textarea>) ? ? ? ? ?
On any block-level and replaced element, table cell, and inline block element (unless overflow is visible) ? ? ? ? ?

[1] resize doesn't have any effect on <iframe> (cf. bug 680823)

See also

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