- display: inline / inline-block
- 将父元素（容器）设定
text-align: center; - 就可左右置中
- 将父元素（容器）设定
- display: block
- 将元素本身的
margin-left与margin-right设定为auto，就可以左右置中。
- 将元素本身的
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Centering Elements</title>
<link rel="stylesheet" href="./style.css">
</head>
<body>
<div id="black"></div>
</body>/* -- Graphics For Demo -- */
html {
background: url(https://codingstartup.com/assets/centering-elements/dart.png) no-repeat center center;
background-size: 460px 460px;
min-height: 100vh;
margin: 0;
}
#black {
background: url(https://codingstartup.com/assets/centering-elements/black.png) no-repeat center;
background-size: cover;
width: 160px;
height: 160px;
}
/* -- Graphics For Demo -- */- 对齐元素本身
#black {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}- 对齐元素内容
body {
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
}- 对齐元素内容
<div class="cell">
<div id="black"></div>
</div>/* -- Graphics For Demo -- */
html {
background: url(https://codingstartup.com/assets/centering-elements/dart.png) no-repeat center center;
background-size: 460px 460px;
min-height: 100vh;
margin: 0;
}
#black {
background: url(https://codingstartup.com/assets/centering-elements/black.png) no-repeat center;
background-size: cover;
width: 160px;
height: 160px;
display: inline-block;
}
/* -- Graphics For Demo -- */
body {
display: table;
width: 100%;
min-height: 100vh;
margin: 0;
}
.cell {
display: table-cell;
vertical-align: middle;
text-align: center;
}