html flex grow

1#content {
2  display: flex;
3
4  justify-content: space-around;
5  flex-flow: row wrap;
6  align-items: stretch;
7}
8
9.box {
10  flex-grow: 1;
11  border: 3px solid rgba(0,0,0,.2);
12}
13
14.box1 {
15  flex-grow: 2;
16  border: 3px solid rgba(0,0,0,.2);
17}
18

1<h4>This is a Flex-Grow</h4>
2<h5>A,B,C and F are flex-grow:1 . D and E are flex-grow:2 .</h5>
3<div id="content">
4  <div class="box" style="background-color:red;">A</div>
5  <div class="box" style="background-color:lightblue;">B</div>
6  <div class="box" style="background-color:yellow;">C</div>
7  <div class="box1" style="background-color:brown;">D</div>
8  <div class="box1" style="background-color:lightgreen;">E</div>
9  <div class="box" style="background-color:brown;">F</div>
10</div>
11

1flex-grow: <number>
2
3/*example*/
4.flex-item {
5  flex-grow: 2;
6}