center element in div
/* html */
<h1>Centering with CSS</h1>
<h3>Text-Align Method</h3>
<div class="blue-square-container">
<div class="blue-square"></div>
</div>
<h3>Margin Auto Method</h3>
<div class="yellow-square"></div>
<h3>Absolute Positioning Method</h3>
<div class="green-square"></div>
/* css */
h1,
h3 {
text-align: center;
}
.blue-square-container {
text-align: center;
}
.blue-square {
background-color: #0074D9;
width: 100px;
height: 100px;
display: inline-block;
}