I'm attempting to style heading text similar to how your default legend text appears in fieldsets; that is to say, I'd like a strikethrough-like line to come up to, but not through, the text. I can't seem to find any information on how I might accomplish this, and since on numerous other questions Google's always directed me to Stack Overflow for answers, I thought someone here may be able to give me advice.

For greater clarity. I'm attempting to get this effect on header text:

Centered Header Text

Is there any way to do this?

See: http://jsfiddle.net/thirtydot/jm4VQ/

If the text needs to wrap, this won't work. In IE7, there will be no line.

HTML:

<h2><span>Centered Header Text</span></h2>

CSS:

h2 {
    text-align: center;
    display: table;
    width: 100%;
}
h2 > span, h2:before, h2:after {
    display: table-cell;
}
h2:before, h2:after {
    background: url(http://dummyimage.com/2x1/f0f/fff&text=+) repeat-x center;
    width: 50%;
    content: ' ';
}
h2 > span {
    white-space: nowrap;
    padding: 0 9px;
}

I came up with a quick, image-less solution that seems to work pretty well in IE 8+ and other browsers, whilst gracefully degrading in IE 6/7:

<h1>CSS 2.1 EXAMPLE</h1>

h1 { position: relative; text-align: center; }
h1:first-line { background-color: white; }
h1:before {
    position: absolute;
    z-index: -1;
    content: '';
    left: 0px;
    right: 0px;
    height: 1px;
    top: 50%;
    background-color: black;
}

It does come with the following limitations, though:

The text must match the overall background colour exactly, otherwise it will look weird.
If you want any kind of padding on the text, you need to use non-breaking spaces at either side of the text (see demo).
Heading text must always be on one line (works best if fixed width).

Here's a demo: http://jsfiddle.net/AndyE/3tFQJ/

Edit:

<h2><strike>&nbsp;&nbsp;&nbsp;&nbsp;</strike>Your Text Here<strike>&nbsp;&nbsp;&nbsp;&nbsp;</strike></h2>

Here's how you can do it with a few simple tags and non-breaking spaces.

I'd use an image and call it a day, but this seemed to work for me:

CSS

  fieldset {
    border-right: 0px;
    border-left: 0px;
    border-bottom: 0px;
    width: 200px;
  }
  legend {
    margin: 0 25%;
  }

HTML

<fieldset>
  <legend>My Text Here</legend>
</fieldset>

That's the only way I could figure out how to do it with css. Note the width is fixed. Once again I wouldn't do this myself.

Here is what I am using on a client's site: http://jsfiddle.net/TPgE4/

Pros:

No images needed - renders instantly
Uses padding to control space on both sides of text
Text can be center aligned, or left/right aligned — just add, e.g., margin-left: 8px or margin-right: 8px on h2 span style definition to make it look good

Cons:

Requires use of additional tag such as <span>...</span> inside heading tag
Text must fit on one line for good appearance
Background color on <span> element must match surrounding background color, so if you have a non-solid background image, gradient or pattern it won't match perfectly

Kind of late to the party, but this is my solution: https://jsfiddle.net/g43pt908/

Requires no images, and doesn't depend on a background color.

HTML

<div class="hr-text">
    <span>Some text</span>
</div>

CSS

.hr-text {
    border-top: 1px solid #999;
    text-align: center;
    background-color: inherit;
}

.hr-text span {
    display: inline-block;
    position: relative;
    height: 14px;
    top: -12px;
    font-size: 14px;
    font-style: italic;
    color: #666;
    background-color: inherit;
    padding: 0 10px;
}

With flexbox being supported by all the latest browsers out there, and it being five years since the IE8 requirement was mentioned by the author, I wanted to have some fun building a new solution using that.

A variety of examples getting more complicated:

https://jsfiddle.net/0mL79b4h/1/

https://jsfiddle.net/0mL79b4h/2/

CSS

div {
  display: flex;
  align-items: center;
}

div:before,
div:after {
  border: 1px solid #000000;
  border-radius: 2px;
  height: 2px;

  display: block;

  content: "";
  flex: 1;

  width: 100%;
}

h1 {
  text-align: center;

  margin: 8px;
}

HTML

<div>
  <h1>Example Text</h1>
</div>

<div>
  <h1>Multi-Line<br>Example Text</h1>
</div>

Pros:

Uses flexbox!
Super simple HTML.
Left and right sides can be adjusted for asymmetry.
Zero background issues, no inheriting colors, etc.
Fluid width.
Multi-Line support.
Left/Center/Right/Custom Alignment: Just adjust the flex property separately for the before and after elements, higher numbers will dedicate more space to that side. Remove one entirely to left or right align it.
Interesting effects by playing with the border style (I actually chose a round border in this example). Set height to 0px and use border-top instead for a generic line.

Cons:

Uses flexbox. Call me lazy, but I didn't build in any backward compatibility in this example so it'll look odd on a browser that supports psuedo elements but doesn't support flexbox, although last I checked that was Chrome (Firefox, etc), which are all automatically updated anyway. Might want to use some Modernizr.

I'm not sure if this would suit your need...

h1:before, h1:after {
 content: " ------------- ";
}

This doesn't feel like a very good answer, but I'm posting it anyway.

See: http://jsfiddle.net/rFmQg/

<h2><span>Centered Header Text</span></h2>

h2 {
    background: url(http://dummyimage.com/2x1/f0f/fff&text=+) repeat-x center;
    text-align: center
}
h2 span {
    background: #fff;
    padding: 0 9px
}

I don't like it because:

You have to use an image.
This. (it only works if the backgrounds match)

body { padding-top: 100px; }

div.parent {
    text-align: center;
    border-top: 1px solid #ccc;
}

div.parent div {
    display: inline-block;
    margin-top: -0.8em;
    padding: 0 0.5em;
    background: #fff;
}

<body>
    <div class="parent">
        <div>My Text Here</div>
    </div>
</body>

This is a fluid-width solution that matches your design and should be ok in IE7 (though I'll admit I didn't check). There are a couple of downsides:

You lose the fieldset/legend semantics.
You can't put a transparent background on the text.

If you don't need it to be fluid-width, onteria_'s solution is probably your best bet.

来源：https://stackoverflow.com/questions/5985009/how-can-i-make-a-fieldset-legend-style-background-line-on-heading-text

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css

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legend

fieldset

How can I make a fieldset legend-style “background line” on heading text?

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