Demo
HTML :
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Demo</title>
</head>
<body>
<div class="wrapper basic">
<div class="element a">Element 1</div>
<div class="element b">Element 2</div>
<div class="element c">Element 3</div>
<div class="element d">Element 4</div>
</div>
<br>
<div class="wrapper justify-content">
<div class="element a">Element 1</div>
<div class="element b">Element 2</div>
<div class="element c">Element 3</div>
<div class="element d">Element 4</div>
</div>
<br>
<div class="wrapper full-centered">
<div class="element a">Element 1</div>
<div class="element b">Element 2</div>
<div class="element c">Element 3</div>
<div class="element d">Element 4</div>
</div>
<br>
<div class="wrapper align-lines">
<div class="element a">Element 1</div>
<div class="element b">Element 2</div>
<div class="element c">Element 3</div>
<div class="element d">Element 4</div>
</div>
</body>
</html>
CSS :
.wrapper {
display:flex;
}
.basic {
flex-direction: row;
flex-wrap: wrap; /* Line break */
}
.justify-content {
flex-direction: row;
justify-content: space-around;
}
.full-centered {
height: 100px;
background-color: grey;
flex-direction: row;
justify-content: center;
align-items: center;
}
.wrapper.align-lines {
height: 75px;
flex-wrap: wrap;
background-color: grey;
flex-direction: column;
align-content: flex-end;
}
.wrapper.align-lines .element {
width: 500px;
}
.wrapper.full-centered .element {
margin:auto;
}
.wrapper.basic .element {
width: 500px;
}
.element.a {
background-color: yellow;
}
.element.b {
background-color: blue;
}
.element.c {
background-color: green;
}
.element.d {
background-color: red;
}