what does display flex property? code example

Example 1: css all flex properties

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

Example 2: css flex

.item {
  align-self: auto | flex-start | flex-end | center | baseline | stretch;
}