Html
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center h1 in the middle of screen（示例提问）
How can I center horizontally and vertically a text? I don't want to use position absolute because I try with it and my other div getting worse. Is there another way to do that ?div {
height: 400px;
width: 800px;
background: red;
}<div>
<h1>This is title</h1>
</div>