Question

我创建了一个网站。当身体长于页面以便显示滚动条时，身体会向左移动几个像素。这让我很困惑。是否有一些自动设置正在执行此操作？

如果你想看到它，这是我的CSS。

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, 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,
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: inherit;
  vertical-align: center;
}

#cohenImage{
    float:right;
    margin-left:1em;
    border: .2em solid #D3D3D3
}

.block {
    display:block;
}

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


/*******************************************************************************
Theme Styles
*******************************************************************************/


body {
    box-sizing: border-box;
    color:#373737;
    background: transparent;
    font-family: 'Myriad Pro', Calibri, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    width: 70%;
    margin-right:auto;
    margin-left:auto;
    padding: 3em;
    background-image:url('../Cohen-Background.jpg');
    background-color:#000000;
}

.inline{
    display:inline;
}

.title {
  margin: 0;
  color: #fff;
  font-size: 300%;
  font-weight: 700;
  text-shadow: #111 0px 0px 10px;
  padding-top:.8em;
  padding-bottom:.7em;
}



h1, h2, h3, h4, h5, h6 {
  margin: 10px 0;
  font-weight: 700;
  color:#222222;
  font-family:'Lucida Grande', 'Calibri', Helvetica, Arial, sans-serif;
  letter-spacing: -1px;
}

h1 {
  font-size: 250%;
  font-weight: 700;
}

h2 {
  padding-bottom: 10px;
  font-size: 250%;
}

h3 {
  font-size: 200%;
}

h4 {
  font-size: 170%;
}

h5 {
  font-size: 120%;
}

h6 {
  font-size: 110%;
}

p {
  font-size:105%;
}

b {
    font-weight:bold;
}

footer p {
  color: #f2f2f2;
}


ul.menu {
    margin: 0;
    padding: 0;
}

ul.menu {
    height: 80px;
    float:left;
}

ul.menu li {
    list-style: none;
    float:left;
    height: 2em;
    text-align: center;
    background : -webkit-gradient(linear, left top, left bottom, from(rgb(168,168,168)), to(rgb(69,69,69)));
    background : -moz-linear-gradient(top, rgb(168,168,168), rgb(69,69,69));
    background: -o-linear-gradient(top, rgb(100,170,255) 0%,rgb(69,69,69) 100%);
    background: -ms-linear-gradient(top, rgb(100,170,255) 0%,rgb(69,69,69) 100%)
}

ul.menu li a {
    display: block;
    padding: 0 20px;
    text-align: center;
    line-height: 2em;
    text-decoration:none;
    background : -webkit-gradient(linear, left top, left bottom, from(rgb(168,168,168)), to(rgb(69,69,69)));
    background : -moz-linear-gradient(top, rgb(168,168,168), rgb(69,69,69));
    background: -o-linear-gradient(top, rgb(168,168,168) 0%,rgb(69,69,69) 100%);
    background: -ms-linear-gradient(top, rgb(168,168,168) 0%,rgb(69,69,69) 100%);
    color:white;
    font-weight:bold;
}

ul.menu li a:hover {
    background: #919191;
}

ul li.active a{
    background : #9E9E9E;
}

.wrapper {
    width: 100%;
    height: 2.1em;
    background : #464646;
    background : -webkit-gradient(linear, left top, left bottom, from(rgb(168,168,168)), to(rgb(69,69,69)));
    background : -moz-linear-gradient(top, rgb(168,168,168), rgb(69,69,69));
    background: -o-linear-gradient(top, rgb(168,168,168) 0%,rgb(69,69,69) 100%);
    background: -ms-linear-gradient(top, rgb(168,168,168) 0%,rgb(69,69,69) 100%)
    position: relative;
}



.inner {
  position: relative;
  padding: 2em;
  margin: 0 auto;
  font-size:105%
}

.header{
  background:rgba(0, 0, 0, 0.9);
  border-top: .3em solid #2E2E2E;
  border-left: .3em solid #2E2E2E;
  border-right: .3em solid #2E2E2E;
  border-top-left-radius: 1em;
  border-top-right-radius: 1em;
  text-align:center;
  margin-right:auto;
  margin-left:auto;
  color:white;
}



#main_content_wrap {
  background: #FCFCFC;
  text-align:left;
  padding:0;
  margin:0;
}

#main_content {
  padding-top: 3em;
}

#footer_wrap {
  background:rgba(0, 0, 0, 0.9);
  border-top: .3em solid #2E2E2E;
  border-left: .3em solid #2E2E2E;
  border-right: .3em solid #2E2E2E;
  border-bottom-left-radius: 1em;
  border-bottom-right-radius: 1em;
  text-align:center;
  margin-right:auto;
  margin-left:auto;
  color:white;
}

table {
    background-color: #EEEEEE;
    border: 2px solid #D4D4D4;
    border-collapse: collapse;
    padding-left: 2px;
}
thead {
    color:black
}
th {
    background-color: #D4D4D4;
    padding-right: 4px;
}
tr, td, th {
    border: 2px solid #D4D4D4;
    padding-left: 4px;
}
dt {
    font-weight: bold;
}

/*******************************************************************************
Small Device Styles
*******************************************************************************/

/* Smartphones (portrait and landscape) ----------- */
@media only screen 
and (min-device-width : 320px) 
and (max-device-width : 480px) {
        body{
        width: 100%;
    }
}

/* Smartphones (landscape) ----------- */
@media only screen 
and (min-width : 321px) {
        body{
        width: 100%;
    }
}

/* Smartphones (portrait) ----------- */
@media only screen 
and (max-width : 320px) {
    body{
        width: 100%;
    }
}

/* iPads (portrait and landscape) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) {
    body{
        width: 100%;
    }
}

/* iPads (landscape) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : landscape) {
    body{
        width: 100%;
    }
}

/* iPads (portrait) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : portrait) {
    body{
        width: 100%;
    }
}

/* Desktops and laptops ----------- */
@media only screen 
and (min-width : 1224px) {
    body{
        width: 70%;
    }
}

/* Large screens ----------- */
@media only screen 
and (min-width : 1824px) {
    body{
        width: 70%;
    }
}

/* iPhone 4 ----------- */
@media

only screen and (-webkit-min-device-pixel-ratio : 1.5),
only screen and (min-device-pixel-ratio : 1.5) {
    body{
        width: 100%;
    }
}

Answer 1

这是几乎所有浏览器的功能。如果窗口的元素太高，则会出现垂直滚动条。此滚动条确实占用了以前可用于窗口的一些宽度。因此，如果您的css取决于窗口的宽度，例如width: 100%，则这些项目将更改大小。如果您希望不显示垂直滚动条而不占用任何屏幕宽度，请使用以下内容：overflow: hidden或overflow-y: hidden

Answer 2

浏览器必须为垂直滚动条腾出空间（并非所有浏览器，Safari和OS X上的Chrome可能会在内容上呈现滚动条，我没有长时间测试，所以我不确定）。
这是浏览器的软件UI的元素部分的预期行为：请参阅previous answer关于用户期望的原因，而不是我们的webdesigners和webdevelopers要解决的问题。

页面宽度在高度超过可视区域时更改

2 个答案: