CSS

flex-flow

/* Flex-flow combines flex-wrap and flex-direction because they were used 
together so often, and devs wanted to simplify it.*/

/*Normal*/

* {
flex-direction: column-reverse;
flex-wrap: wrap;
}

/*Flex-flow*/

* {
flex-flow: column-reverse wrap;
}

flex flow

.container{
      flex-flow: (flex-direction) (flex-wrap);
}