将最大宽度应用于相对定位 Div 内的固定定位 Div?
Applying Max-Width to a Fixed-Positioned Div Within a Relative-Positioned Div?
将相对 div 中的固定 div 向右对齐,同时仍保留继承的 max-width
的最佳方法是什么?
更新(2018 年 1 月 24 日): 我已经用解决方案回答了这个问题。参见 。
请参阅以下代码片段以供进一步参考:
body {
margin: 0;
padding: 0;
border: 0;
}
.container {
width: 100%;
}
.max-width {
margin: 0 auto;
max-width: 500px;
height: 1000px;
position: relative;
box-sizing: border-box;
background-color: lightgrey;
}
.box {
max-width: inherit;
width: 20%;
height: 20px;
position: fixed;
background: blue;
float: right;
color: white;
text-align: center;
right: 0;
}
<div class="container">
<div class="max-width">
<div class="box">fix to right?</div>
</div>
</div>
固定元素的位置总是相对于 viewport/window,从不相对于任何其他元素。
您唯一可以做的(使用 CSS)是使用 right: calc(50% - 250px);
作为其位置,使其与 500 像素宽居中 "parent" 元素的右边界右对齐,但这仅在屏幕更宽或等于 "parent" 元素的 max-width
时有效。
评论后添加:另外为宽度低于 500px 的屏幕添加媒体查询right: 0
(感谢@MrLister)
body {
margin: 0;
padding: 0;
border: 0;
}
.container {
width: 100%;
}
.max-width {
margin: 0 auto;
max-width: 500px;
height: 1000px;
position: relative;
box-sizing: border-box;
background-color: lightgrey;
}
.box {
max-width: inherit;
width: 20%;
height: 20px;
position: fixed;
top: 0;
right: calc(50% - 250px);
background: blue;
float: right;
color: white;
text-align: center;
}
@media (max-width: 500px) {
.box {
right: 0px;
}
}
<div class="container">
<div class="max-width">
<div class="box">fix to right?</div>
</div>
</div>
如果你这样做会怎样:
Css
body {
margin: 0;
padding: 0;
border: 0;
}
.container {
width: 100%;
}
.max-width {
margin: 0 auto;
max-width: 500px;
height: 1000px;
position: relative;
box-sizing: border-box;
background-color: lightgrey;
}
.box {
max-width: inherit;
width: 20%;
height: 20px;
position: fixed;
top: 0;
right: calc(50% - 250px);
background: blue;
float: right;
color: white;
text-align: center;
}
@media screen and (max-width: 500px) {
.box {
right: 0;
}
}
@media screen and (min-width: 501px) {
.box {
width: 100px; /* 100px is 20% of the max-width */
}
}
Html
<div class="container">
<div class="max-width">
<div class="box">fix to right?</div>
</div>
</div>
想出了一些办法。毕竟可以做到!
body {
margin: 0;
padding: 0;
border: 0;
width: 100%;
}
.max-width {
max-width: 500px;
height: 2000px;
margin: auto;
background-color: lightgrey;
position: relative;
}
.box1 {
position: relative;
width: 20%;
height: 100px;
background-color: yellow;
text-align: center;
}
.container {
position: absolute;
width: 60%;
background-color: purple;
height: 100%;
margin: 0 auto;
left: 0;
right: 0;
top: 0;
text-align: center;
}
.wrap-box {
position: fixed;
max-width: 500px;
width: 100%;
height: 100%;
left: 50%;
transform: translateX(-50%);
top: 0;
}
.wrap-box > div.box2 {
width: 20%;
height: 100px;
background-color: blue;
position: absolute;
top: 0;
right: 0;
text-align: center;
}
.wrap-box > div.box3 {
width: 20%;
height: 100px;
background-color: green;
position: absolute;
bottom: 0;
right: 0;
text-align: center;
}
<div class="max-width">
<div class="box1">position: relative, width: 20%</div>
<div class="container">
position: absolute, width: 60%
<div class="wrap-box">
<div class="box2">position: fixed (top), width: 20%</div>
<div class="box3">position: fixed (bottom), width: 20%</div>
</div>
</div>
</div>
将相对 div 中的固定 div 向右对齐,同时仍保留继承的 max-width
的最佳方法是什么?
更新(2018 年 1 月 24 日): 我已经用解决方案回答了这个问题。参见
请参阅以下代码片段以供进一步参考:
body {
margin: 0;
padding: 0;
border: 0;
}
.container {
width: 100%;
}
.max-width {
margin: 0 auto;
max-width: 500px;
height: 1000px;
position: relative;
box-sizing: border-box;
background-color: lightgrey;
}
.box {
max-width: inherit;
width: 20%;
height: 20px;
position: fixed;
background: blue;
float: right;
color: white;
text-align: center;
right: 0;
}
<div class="container">
<div class="max-width">
<div class="box">fix to right?</div>
</div>
</div>
固定元素的位置总是相对于 viewport/window,从不相对于任何其他元素。
您唯一可以做的(使用 CSS)是使用 right: calc(50% - 250px);
作为其位置,使其与 500 像素宽居中 "parent" 元素的右边界右对齐,但这仅在屏幕更宽或等于 "parent" 元素的 max-width
时有效。
评论后添加:另外为宽度低于 500px 的屏幕添加媒体查询right: 0
(感谢@MrLister)
body {
margin: 0;
padding: 0;
border: 0;
}
.container {
width: 100%;
}
.max-width {
margin: 0 auto;
max-width: 500px;
height: 1000px;
position: relative;
box-sizing: border-box;
background-color: lightgrey;
}
.box {
max-width: inherit;
width: 20%;
height: 20px;
position: fixed;
top: 0;
right: calc(50% - 250px);
background: blue;
float: right;
color: white;
text-align: center;
}
@media (max-width: 500px) {
.box {
right: 0px;
}
}
<div class="container">
<div class="max-width">
<div class="box">fix to right?</div>
</div>
</div>
如果你这样做会怎样:
Css
body {
margin: 0;
padding: 0;
border: 0;
}
.container {
width: 100%;
}
.max-width {
margin: 0 auto;
max-width: 500px;
height: 1000px;
position: relative;
box-sizing: border-box;
background-color: lightgrey;
}
.box {
max-width: inherit;
width: 20%;
height: 20px;
position: fixed;
top: 0;
right: calc(50% - 250px);
background: blue;
float: right;
color: white;
text-align: center;
}
@media screen and (max-width: 500px) {
.box {
right: 0;
}
}
@media screen and (min-width: 501px) {
.box {
width: 100px; /* 100px is 20% of the max-width */
}
}
Html
<div class="container">
<div class="max-width">
<div class="box">fix to right?</div>
</div>
</div>
想出了一些办法。毕竟可以做到!
body {
margin: 0;
padding: 0;
border: 0;
width: 100%;
}
.max-width {
max-width: 500px;
height: 2000px;
margin: auto;
background-color: lightgrey;
position: relative;
}
.box1 {
position: relative;
width: 20%;
height: 100px;
background-color: yellow;
text-align: center;
}
.container {
position: absolute;
width: 60%;
background-color: purple;
height: 100%;
margin: 0 auto;
left: 0;
right: 0;
top: 0;
text-align: center;
}
.wrap-box {
position: fixed;
max-width: 500px;
width: 100%;
height: 100%;
left: 50%;
transform: translateX(-50%);
top: 0;
}
.wrap-box > div.box2 {
width: 20%;
height: 100px;
background-color: blue;
position: absolute;
top: 0;
right: 0;
text-align: center;
}
.wrap-box > div.box3 {
width: 20%;
height: 100px;
background-color: green;
position: absolute;
bottom: 0;
right: 0;
text-align: center;
}
<div class="max-width">
<div class="box1">position: relative, width: 20%</div>
<div class="container">
position: absolute, width: 60%
<div class="wrap-box">
<div class="box2">position: fixed (top), width: 20%</div>
<div class="box3">position: fixed (bottom), width: 20%</div>
</div>
</div>
</div>