Answers for "what is display flex"

css flex

.container {
  flex-flow: column wrap;
}

css flex

.item {
  order: 5; /* default is 0 */
}

flexbox css

.container {
  justify-content: flex-start | flex-end | center | space-between | space-around | space-evenly | start | end | left | right ... + safe | unsafe;
}

flex css

.container {
  flex-direction: row | row-reverse | column | column-reverse;
}

css flex

.item {
  flex-basis:  | auto; /* default auto */
}

display flex css

.class {
  display: flex;
}

/* use display: flex to turn CSS element into a flexbox */