CSS文本方向_html/css_WEB-ITnose
× 目录 [1]text-align [2]writing-mode [3]dir [4]direction [5]unicode-bidi
前面的话
一般地，正常网页文本方向都是从上到下，从左到右。实际上，有多种设置文本方向的属性，前面已经详细介绍过text-align，HTML全局属性中有一个"dir"属性就是专门用来设置文本方向的，设置文本方向的CSS样式有direction、unicode-bidi和writing-mode。本文将详细介绍网页文本方向的设置方法
text-align
水平对齐实现上影响的是一个元素中的文本的水平对齐方式，关于text-align的详细信息移步至此
值: left | center | right | justify | inherit
初始值: left
应用于: 块级元素(包括block和inline-block)
继承性: 有
//left: 1 23 456//right: 1 23 456
writing-mode
writing-mode原先是IE的私有属性，原先的属性是lr-tb(左-右，上-下)和tb-rl(上-下，右-左)。其中writing-mode:tb-rl常用于触发haslayout。但W3C将writing-mode属性标准化后，其属性值也发生了变化
值: horizontal-tb | vertical-rl | vertical-lr
初始值: horizontal-tb
应用于: 除表格类元素之外的所有元素
继承性: 有
[注意]safari和移动端IOS和android需要添加-webkit-前缀；IE浏览器只支持自己的私有属性值
[注意]设置writing-mode时，text-align属性失效
dir
dir是HTML的全局属性，专门用来设置文本的方向
值: ltr | rtl | auto
//ltr: 1 23 456//rtl: 456 23 1
direction
direction是设置文本方向的CSS样式
值: ltr | rtl | inherit
初始值: ltr
应用于: 所有元素
继承性: 有
[注意]想让direction样式在inline元素上起作用，需要unicode-bidi样式的相关设置
[注意]设置direction样式时，HTML元素的全局属性dir无效
ltr: 从左到右(left to right)rtl: 从右到左(right to left)
//ltr: 1 23 456//rtl: 456 23 1
unicode-bidi
unicode-bidi是一种更健壮的处理文本方向的方式
值: normal | embed | bidi-override | isolate | isolate-override | plaintext | inherit
初始值: normal
应用于: 所有元素
继承性: 无
[注意]unicode-bidi属性应用于flex弹性盒模型上有问题，除非伸缩容器只包含一个匿名伸缩项目时有效，其余情况都无效
[注意]isolate、isolate-override、plaintext是实验属性值，几乎没有浏览器支持
//display:inline-block/blocknormal/embed: 456 23 1bidi-override: 654 32 1//display:inlinenormal:1 23 456embed: 456 23 1bidi-override: 654 32 1
[注意]只有当dir为rtl或direction为rtl时，unicode-bidi属性才起作用
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