javascript - “拉伸(stretch)”一个 div 到浏览器的边缘

Question

我正在尝试实现固定宽度的居中布局，其中的标题“延伸”到用户浏览器的边缘。像这样...

有什么办法可以实现吗？

Answer 1

这很好用。它可以进行一些改进，但这个想法非常可靠。

Live Demo ( edit )

CSS:

html, body {
    margin: 0;
    padding: 0;
    border: 0;
    overflow-x: hidden
}
body {
    background: #eee
}
#container {
    width: 80%;
    margin: 0 auto;
    background: #bbb;
}
#menu {
    overflow: auto
}
#menu li {
    float: left;
    width: 40px;
    margin: 5px;
    height: 24px;
    background: #fff
}
h1, h1 span, h2, h2 span {
    padding: 3px 0;
    height: 25px;
}
h1, h2 {
    position: relative;
    margin: 9px 0
}
h1 span, h2.left span {
    display: block;
    position: absolute;
    width: 100%;
    left: -100%;
    top: 0
}
h2.right span {
    display: block;
    position: absolute;
    width: 102%;
    left: 100%;
    top: 0
}

h1 {
    background: red;
    width: 80%
}
h1 span {
    background: blue /* blue for demonstration purposes */
}
h2.left {
    background: red;
    width: 30%;
    float: left
}
h2.left span {
    background: blue /* blue for demonstration purposes */
}
h2.right {
    background: red;
    width: 30%;
    float: right
}
h2.right span {
    background: blue /* blue for demonstration purposes */
}

#content {
    clear: both
}

HTML:

<div id="container">
    <h1><span></span>Heading</h1>
    <h2 class="left"><span></span>Sub-heading</h2>
    <h2 class="right">Sub-heading<span></span></h2>
    <div id="content">
        Hi!
    </div>
</div>