CSS 100% 高度不起作用但 body 是 100% 高度？

Question

我正在开发我的新站点，我有 4 个部分 header、导航、主要部分和页脚。

如果您将垂直方向的 window 变小，导航栏高度将正常工作。

但是如果你把window横向的变小，那么内容就会变小。

我不明白为什么导航栏不再是 100%？ body 是 100%，导航栏应该有相同的高度，但事实并非如此？

我尝试了 100vh，但它也不起作用，我认为 100% 应该可以吗？

Answer 1

让你的 <nav> 位置 fixed.

使用：

nav {
  position: fixed;
}

而不是：

nav {
  position: absolute;
}

希望对您有所帮助！

Answer 2

试一试：-

html {
  height: 100%;
}
body {
  min-height: 100%;
}

Answer 3

您尝试过添加页面包装器吗？像这样

<body>
    <div class="page-wrapper">
        <header></header>
        <nav></nav>
        <main>
            <p>...</p>
        </main>
        <footer></footer>
    </div>
</body>

.page-wrapper {
    postion:relative;
    display: block;
    width: 100%;
    height: 100%;
}

Answer 4

要在 body 上获得 100% 的高度 HTML 需要先有 100% 的高度，首先让你的 HTML 身高 100%;

 html {
      height:100%;
}

然后 body :

body {
height:100%;
}

最后一个元素你希望它是 100% 高度

nav {
height:100%;
}

Answer 5

制作导航 position: fixed;

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline; }

/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
  display: block; }

body {
  line-height: 1; }

ol, ul {
  list-style: none; }

blockquote, q {
  quotes: none; }

blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none; }

table {
  border-collapse: collapse;
  border-spacing: 0; }

html, body {
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: #f9f9f9; }

body {
  position: relative; }

header {
  width: 100%;
  height: 55px;
  background-color: #47aadd;
  position: relative;
  z-index: 101; }

nav {
  width: 100px;
  height: 100%;
  background-color: #363636;
  float: left;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100; }

footer {
  width: 100%;
  height: 35px;
  background-color: #47aadd;
  float: left;
  position: relative; }

main {
  max-width: calc(100% - 100px);
  min-height: calc(100% - 90px);
  padding: 25px;
  float: right;
  position: relative;
  overflow:auto;

}

*, *:before, *:after {
  box-sizing: border-box; }

<html lang="en"><head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>

</head>
<body>
    <header></header>
    <nav></nav>
    <main>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum commodo dignissim risus, at mollis dui fringilla vitae. Vestibulum cursus consectetur nunc, ut aliquam urna rutrum a. Proin sem nunc, semper a sem et, blandit commodo diam. Nam rhoncus lobortis ligula quis eleifend. Aliquam facilisis tempor lorem, nec tristique mi condimentum nec. Ut in semper odio, in fermentum nibh. Aenean feugiat massa risus, vel tempor leo feugiat non. Cras a iaculis orci.

            Sed maximus nunc eu gravida sagittis. Ut et justo ut est aliquam posuere. Nullam nisi neque, laoreet vel velit vel, scelerisque condimentum lectus. Nam dolor nisl, consequat vitae elementum eget, eleifend quis felis. Nullam vel accumsan ex, eget elementum magna. Sed ut erat fermentum, efficitur nibh tempus, mollis nibh. Vivamus interdum nisi sem, ac sollicitudin sem faucibus eget. Nunc ut leo eget enim posuere luctus. In hac habitasse platea dictumst. Ut condimentum tincidunt lorem, eget eleifend mi malesuada eu. Nam porttitor mi a augue rutrum mattis. Sed pellentesque vitae tortor ut pulvinar. Nam eget tortor tellus.

            Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Nam tristique eros nisl, quis commodo augue gravida nec. Aenean vel ornare quam. Donec commodo purus et suscipit fringilla. Sed ultrices justo vitae lacus egestas malesuada. Vivamus ante dui, consectetur sit amet fringilla vitae, interdum dictum enim. In congue sem diam. Suspendisse eros ligula, porta vel tincidunt vitae, condimentum a nisl. Vestibulum eget tristique quam, ut mollis nisl. Integer condimentum tincidunt est, in viverra ipsum ullamcorper ut. Morbi molestie, lectus sit amet finibus varius, libero nunc vestibulum neque, id luctus sapien ante ut justo. Suspendisse nisl orci, ultrices in magna et, dictum congue nisl. In at vestibulum velit. Nulla sed diam ex. Pellentesque a posuere nibh, sit amet vulputate sem.

            Duis id mollis est. Duis tellus odio, aliquet at nibh eu, tristique consequat nunc. Nullam consequat sapien eget odio tempor, vel sagittis turpis aliquet. Maecenas id nisl euismod, feugiat dui at, vestibulum tortor. Phasellus at sem commodo ligula semper gravida. Duis sapien orci, blandit id viverra quis, venenatis sed est. Duis urna magna, hendrerit id quam pellentesque, posuere suscipit metus. Donec laoreet commodo odio sit amet consequat.

            Pellentesque sem dolor, fringilla ac eros nec, commodo maximus turpis. Proin posuere ut metus mollis porttitor. Pellentesque pellentesque pulvinar lobortis. Curabitur mollis dolor eu sapien ullamcorper, et tristique felis tempus. Cras vulputate neque eget tristique imperdiet. Proin lobortis luctus sem, ac ullamcorper sem eleifend nec. Aliquam vehicula ante non enim sodales, id volutpat libero dapibus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis accumsan dolor nec felis viverra vehicula. Nam ut aliquam mauris. Maecenas vitae purus ligula.</p>
    </main>
    <footer></footer>

</body></html>

CSS 100% 高度不起作用但 body 是 100% 高度？

CSS 100% height not working but body is 100% height?

html

css

height