我制作了一个fiddle，它使用了 FlexBox，还会为您提供不同样式的 HR（双线、线中心的符号、阴影、插入、虚线等）。
CSS
button {
padding: 8px;
border-radius: 4px;
background-color: #fff;
border: 1px solid #ccc;
margin: 2px;
}
button:hover {
cursor: pointer;
}
button.active {
background-color: rgb(34, 179, 247);
color: #fff;
}
.codeBlock {
display: none;
}
.htmlCode, .cssCode {
background-color: rgba(34, 179, 247, 0.5);
width: 100%;
padding: 10px;
}
.divider {
display: flex;
flex-direction: row;
flex-flow: row;
width: 100%;
}
.divider.fixed {
width: 400px;
}
.divider > label {
align-self: baseline;
flex-grow: 2;
white-space: nowrap;
}
.divider > hr {
margin-top: 10px;
width: 100%;
border: 0;
height: 1px;
background: #666;
}
.divider.left > label {
order: 1;
padding-right: 5px;
}
.divider.left > hr {
order: 2
}
.divider.right > label {
padding-left: 5px;
}
/* hr bars with centered text */
/* first HR in a centered version */
.divider.center >:first-child {
margin-right: 5px;
}
/* second HR in a centered version */
.divider.center >:last-child {
margin-left: 5px;
}
/** HR style variations **/
hr.gradient {
background: transparent;
background-image: linear-gradient(to right, #f00, #333, #f00);
}
hr.gradient2 {
background: transparent;
background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(255, 0, 0, 0.5), rgba(0, 0, 0, 0));
}
hr.dashed {
background: transparent;
border: 0;
border-top: 1px dashed #666;
}
hr.dropshadow {
background: transparent;
height: 12px;
border: 0;
box-shadow: inset 0 12px 12px -12px rgba(0, 0, 0, 0.5);
}
hr.blur {
background: transparent;
border: 0;
height: 0;
/* Firefox... */
box-shadow: 0 0 10px 1px black;
}
hr.blur:after {
background: transparent;
/* Not really supposed to work, but does */
content: "\00a0";
/* Prevent margin collapse */
}
hr.inset {
background: transparent;
border: 0;
height: 0;
border-top: 1px solid rgba(0, 0, 0, 0.1);
border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}
hr.flared {
background: transparent;
overflow: visible;
/* For IE */
height: 30px;
border-style: solid;
border-color: black;
border-width: 1px 0 0 0;
border-radius: 20px;
}
hr.flared:before {
background: transparent;
display: block;
content: "";
height: 30px;
margin-top: -31px;
border-style: solid;
border-color: black;
border-width: 0 0 1px 0;
border-radius: 20px;
}
hr.double {
background: transparent;
overflow: visible;
/* For IE */
padding: 0;
border: none;
border-top: medium double #333;
color: #333;
text-align: center;
}
hr.double:after {
background: transparent;
content: "§";
display: inline-block;
position: relative;
top: -0.7em;
font-size: 1.5em;
padding: 0 0.25em;
}
HTML
<div class="divider left">
<hr />
<label>Welcome!</label>
</div>
<p> </p>
<div class="divider right">
<hr />
<label>Welcome!</label>
</div>
<p> </p>
<div class="divider center">
<hr />
<label>Welcome!</label>
<hr />
</div>
<p> </p>
<div class="divider left fixed">
<hr />
<label>Welcome!</label>
</div>
<p> </p>
<div class="divider right fixed">
<hr />
<label>Welcome!</label>
</div>
<p> </p>
<div class="divider center fixed">
<hr />
<label>Welcome!</label>
<hr />
</div>
或者这里是一个交互式 Fiddle：http://jsfiddle.net/mpyszenj/439/