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HomeWeb Front-endHTML Tutorial文本溢出text-overflow和文本阴影text-shadow - 小火柴的蓝色理想

前面的话

  CSS3新增了一些关于文本的样式,其中text-overflow文本溢出和text-shadow文本阴影有些特别。因为它们有对应的overflow溢出属性和box-shadow盒子阴影属性。本文将详细介绍这两个作用在文本上的溢出和阴影属性

 

文本溢出

  一般地,人们一提到文本溢出,想到的就是文本溢出的经典代码

white-<span style="color: #000000;">space: nowrap;
overflow: hidden;
text</span>-overflow: ellipsis;

  但实际上,文本换行不一定非要使用white-space;overflow属性值也不一定非要使用hidden。

定义

text-overflow

  值: clip | ellipsis

  初始值: clip

  应用于: 块级元素、替换元素、表单元格

  继承性: 无

<span style="color: #000000;">clip: 不显示省略标记(...),只是简单的裁切,相当于无效果
ellipsis: 文本溢出时显示省略标记(...),省略标记插入的位置是最后一个字符</span>

  [注意]当文本溢出属性应用于表单元格时,需要设置table-layout:fixed

  [注意]该属性兼容性很好,兼容IE6+的主流浏览器及移动端iso和android

实现

【1】当存在长英文文本时,text-overflow属性起作用的前提是

overflow(或overflow-y或overflow-x):hidden | auto | scroll

【2】当文本为汉字时,text-overflow属性起作用的前提是

实现汉字不自动换行可使用word-<span style="color: #0000ff;">break</span>: keep-all; 或 white-<span style="color: #000000;">space: nowrap;
overflow(或overflow</span>-y或overflow-x):hidden | auto | scroll

 

文本阴影

  类似于盒子阴影,文本阴影也有x轴偏移、y轴偏移、模糊半径和阴影颜色这四个值,但是并没有阴影尺寸和内部阴影这两个值

定义

text-shadow

  值: none | (h-shadow v-shadow blur color)+

  初始值: none

  应用于: 所有元素

  继承性: 无

h-<span style="color: #000000;">shadow: 水平阴影位置(必须)
v</span>-<span style="color: #000000;">shadow: 垂直阴影位置(必须)
blur:     模糊距离(该值不能为负值,可选)
color:    阴影颜色,默认和文本颜色一致(可选) </span>

  [注意]该属性IE9-浏览器不支持

<span style="color: #008000;">//</span><span style="color: #008000;">多层阴影</span>
text-shadow: 1px 1px blue,5px 5px 5px red;

  [注意]不要加太多层阴影,会有性能问题

常见效果

【文字阴影代码查看】

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