Move a column to the next row using Flex Box

Question

I have three columns, of the order of 1,2,3.

HTML

<div class="flex-container">
    <div class="item first">1</div>
    <div class="item second">2</div>
    <div class="item third">3</div>
</div>

CSS

.flex-container {
    display: flex;
}
.item {
    background: orange;
    padding: 10px auto;
    color: #fff;
    font-family: arial;
    flex-grow: 100;
    flex-shrink: 50;
    text-align: center;
}
.first {
    order: 1;
}
.second {
    order: 2;
}
.third {
    order: 3;
}

What I want, when I switch to the columns of the mobile screen, should be displayed as follows:

1 3
2 

Media request

/* Too narrow to support three columns */
 @media all and (max-width: 640px) {
    .second {
        order: 3;
        /* And go to second line */
    }
    .third {
        order: 2;
    }
}

Column two should go to the next row.

Fiddle

Any help? thank

Answer 1

flex-direction - row, column flex-wrap:wrap ( flex-flow:column wrap). , .flex-container , .first .second , , 3 . , .third expand/strecth ( ). flex-grow:0 flex-basis:50%. :

@media all and (max-width: 640px) {
  .flex-container {
    flex-flow:column wrap;  
    height:40px;   
  }    
  .third {
    flex-grow:0;
    flex-basis:50%;
  }
}

, flex-box, .

2