what does flex do in css code example

Example 1: css flexbox syntax

Display: flex 
Flex-direction: row | row-reverse | column | column-reverse
align-self: flex-start | flex-end | center | baseline | stretch
justify-content: start |  center | space-between | space-around | space-evenly

Example 2: flex box in css

<!--basic--flex--layout-->
<html>
	<head>
		<style>
			.parent{
              display:  flex or inline-flex;
              flex-direction: row  or column;
              flex-wrap: wrap or wrap-reverse;
 			}
		</style>
	</head>
	<body>
		<div class="parent">
			<div class="child-1"></div>
			.
			.
			.
		</div>
	</body>
</html>

Example 3: 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 4: display flex

.container {
  display: flex; /* or inline-flex */
}

Example 5: css flex property

flex: none                                            /* value 'none' case */
flex: <'flex-grow'>                                   /* One value syntax, variation 1 */
flex: <'flex-basis'>                                  /* One value syntax, variation 2 */
flex: <'flex-grow'> <'flex-basis'>                    /* Two values syntax, variation 1 */
flex: <'flex-grow'> <'flex-shrink'>                   /* Two values syntax, variation 2 */
flex: <'flex-grow'> <'flex-shrink'> <'flex-basis'>    /* Three values syntax */
flex: inherit

Example 6: css flex

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