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vertical-centering

发布于 2023-08-19 19:14:40 字数 2676 浏览 0 评论 0 收藏 0

vertical-centering

base on absolute position

main {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -3em; /* 6/2 = 3 */
    margin-left: -9em; /* 18/2 = 9 */
    width: 18em;
    height: 6em;
}

Or use calc() function:

main {
    position: absolute;
    top: calc(50% - 3em);
    left: calc(50% - 9em);
    width: 18em;
    height: 6em;
}

Disadvantage:

require element's width and height are both fixed value.

Or use transform feature:

main {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

Disadvantage:

sometimes we can't use absolute position
element will be clipped if it's height is larger than viewport's.
cause element seem to look like fuzzy if it's putted in 0.5px when in some browsers. (use transform-style: preserve-3d to fix)

base on vh

<style>
    main {
        width: 18em;
        padding: 1em 1.5em;
        margin: 50vh auto 0;
        transform: translateY(-50%);
        box-sizing: border-box;
        background: #655;
        color: white;
        text-align: center;
    }

    h1 {
        margin: 0 0 .2em;
        font-size: 150%;
    }

    p {
        margin: 0;
    }

    body {
        background: #fb3;
        font: 100%/1.5 sans-serif;
    }
</style>
<main>
    <h1>Am I centered yet?</h1>
    <p>Center me, please!</p>
</main>

Link: one line to implement full screen area
.section { height: 100vh; }

base on flexbox

<style>
    body {
        display: flex;
        min-height: 100vh;

        background: #fb3;
        font: 100%/1.5 sans-serif;
    }

    main {
        padding: 1em 2em;
        margin: auto;
        box-sizing: border-box;
        background: #655;
        color: white;
        text-align: center;
    }

    h1 {
        margin-bottom: .2em;
        font-size: 150%;
    }
</style>
<body>
<main>
    <h1>Am I centered yet?</h1>
    <p>Center me, please!</p>
</main>
</body>

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vertical-centering

base on absolute position

base on vh

base on flexbox

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。