How can I make a fieldset legend-style “background

问题:

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?

回答1:

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;
}

回答2:

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/​

回答3:

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.

回答4:

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

回答5:

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;
}

回答6:

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.

回答7:

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

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

回答8:

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)

回答9:

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.