Flexbox属性查询列表

　1.任何一个flexbox布局的第一步是需要创建一个flex容器。为此给元素设置display属性的值为flex。在Safari浏览器中，你依然需要添加前缀-webkit。

.flexcontainer {
    display: -webkit-flex;
    display: flex;
}
2.Flex项目是Flex容器的子元素。他们沿着主要轴和横轴定位。默认的是沿着水平轴排列一行。你可以通过flex-direction来改变主轴方向修改为column，其默认值是row。

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
}

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
}

3.将flex项目移动到顶部，取决于主轴的方向。如果它是垂直的方向通过align-items设置；如果它是水平的方向通过justify-content设置。

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-align-items: flex-start;
    align-items: flex-start;
}

4.flex项目称动到左边或右边也取决于主轴的方向。如果flex-direction设置为row，设置justify-content控制方向；如果设置为column，设置align-items控制方向。

4.1移动到左边

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: flex-start;
    justify-content: flex-start;
}

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: flex-start;
    align-items: flex-start;
}

4.2移动到右边

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: flex-end;
    justify-content: flex-end;
}

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: flex-end;
    align-items: flex-end;
}

5.水平垂直居中。通过设置justify-content或者align-items为center。另外根据主轴的方向设置flex-direction为row或column

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
}

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
}

6.相对于flex容器实现自动的伸缩，需要给每个flex项目设置flex属性设置需要伸缩的值。

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
}

.flexcontainer {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
}