flex-direction

概述

CSS flex-direction 属性指定了内部元素是如何在flex容器中布局的，定义了主轴的方向。（是正向的或是相反的）

Note that the value row and row-reverse are affected by the directionality of the flex container. If its dir attribute is ltr, row represents the horizontal axis oriented from the left to the right, and row-reverse from the right to the left; if the dir attribute is rtl, row represents the axis oriented from the right to the left, and row-reverse from the left to the right. 

See Using CSS flexible boxes for more properties and information.

语法

/* The direction text is laid out in a line */
flex-direction: row;

/* Like <row>, but reversed */
flex-direction: row-reverse;

/* The direction in which lines of text are stacked */
flex-direction: column;

/* Like <column>, but reversed */
flex-direction: column-reverse;

flex-direction: inherit

取值

The following values are accepted:

row

The flex container's main-axis is defined to be the same as the text direction. The main-start and main-end points are the same as the content direction.

row-reverse

Behaves the same as row but the main-start and main-end points are permuted.

column

The flex container's main-axis is the same as the block-axis. The main-start and main-end points are the same as the before and after points of the writing-mode.

column-reverse

Behaves the same as column but the main-start and main-end are permuted.

语法格式

row | row-reverse | column | column-reverse

例子

element { 
  flex-direction: row-reverse;
}

规范

浏览器兼容性

^[1] To activate flexbox support for Firefox 18 and 19, the user has to change the about:config preference "layout.css.flexbox.enabled" to true.

^[2] Multi-line flexbox are supported since Firefox 28.

参考

• Using CSS flexible boxes