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flexLayout

flex 布局

容器的6个属性:
  flex-direction
  flex-wrap
  flex-flow
  justify-content
  align-items
  align-content


flex-direction:
    row(默认):主轴为水平方向,起点在左端
    row-reverse:主轴在水平方向,起点在右端
    column:主轴为垂直方向,起点在上沿
    column-reverse:主轴为垂直方向,起点在下沿
    
flex-wrap:
    nowrap(默认):不换行
    wrap:换行,第一行在上方
    wrap-reverse:换行,第一行在下方
    
flex-flow:flex-direction和flex-wrap的简写形式,flex-flow: <flex-direction> || <flex-wrap>;

justify-content:定义项目在主轴上的对其方式
    flex-start(默认):左对齐
    flex-end:右对齐
    center:居中
    space-between:两端对齐,项目之间的间隔相等
    space-around:每个项目两侧的间隔相等。项目与项目间的间隔,是,项目与边框间的间隔的两倍
    
align-items:定义项目在交叉轴上如何对齐
    flex-start:交叉轴的起点对齐
    flex-end:交叉轴的终点对齐
    center:交叉轴的中点对齐
    baseline:项目的第一行文字的基线对齐
    stretch(默认):如果项目未设置高度或设为auto,则将占满整个容器
    
align-content:定义了多根轴线的对齐方式。如果只有一根轴线,则该属性不起作用
    flex-start:交叉轴的起点对齐
    flex-end:交叉轴的终点对齐
    center:交叉轴的中点对齐
    space-between:与交叉轴的两端对齐,轴线之间的间隔平均分布
    space-around:每根轴线两侧的间隔相等
    stretch:轴线占满整个交叉轴
    
项目的6个属性:
order:定义项目的排列顺序。数值越小,排列越靠前,默认为0
flex-grow:定义项目的放大比例。默认为0
flex-shrink:定义项目的缩小比例。默认为0
flex-basis:定义在分配多余空间之前,项目占主轴空间。默认为auto
flex:flex-grow/shrink/basis的缩写,flex: none | [flex-grow] [flex-shrink]? || [flex-basis]。两个快捷值:auto(1,1,auto),none(0,0,auto)
align-self:允许单个项目有与其它项目不一样的对齐方式,可覆盖align-items属性。默认值为auto,表示继承父元素align-items属性

平时项目对flex经常使用的做了简要编写:

.flexbox {
    display: -webkit-box !important;
    display: -ms-flexbox !important;
    display: flex !important;

    & > .cell {
        -webkit-box-flex: 1;
        -ms-flex: 1;
        flex: 1;
        flex-basis: auto;
        display: block !important;
        flex-basis: 1px;
        display: -webkit-box !important;
        -webkit-box-align: center;
        -webkit-box-pack: center;
        display: -ms-flexbox !important;
        -ms-flex-pack: center;
        -ms-flex-align: center;
        -webkit-box-orient: vertical;
        -ms-flex-orient: vertical;
        position: relative;

        &.left {
            -webkit-box-align: start;
        }

        &.right {
            -webkit-box-align: end;
        }

        &.top {
            -webkit-box-pack: start;
        }

        &.bottom {
            -webkit-box-pack: end;
        }

        &.ng-hide:not(.ng-hide-animate) {
            display: none !important;
        }

        &.hide {
            display: none !important;
        }
    }

    & > .fixed {
        position: relative;
    }

    &.hide, &.ng-hide:not(.ng-hide-animate) {
        display: none !important;
    }
}

详解来自http://www.ruanyifeng.com/blog/2015/07/flex-grammar.html?utm_source=tuicool

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