Is there any way to have a fieldset width only be as wide as the controls in them?

It seems that fieldset defaults to 100% width of its container. Is there any way that you ca开发者_如何学运维n have the field set just be as big as the widest control inside the fieldset?

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Use display: inline-block, though you need to wrap it inside a DIV to keep it from actually displaying inline. Tested in Safari.

<style type="text/css">
    .fieldset-auto-width {
         display: inline-block;
    }
</style>
<div>
  <fieldset class="fieldset-auto-width">
      <legend>Blah</legend>
      ...
  </fieldset>
</div>

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fieldset {display:inline} or fieldset {display:inline-block}

If you want to separate two fieldsets vertically, use a single <br/> between them. This is semantically correct and no harder than it has to be.

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You could float it, then it will only be as wide as its contents, but you'll have to make sure you clear those floats.

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This also works. 

fieldset {
  width:0px;
}

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Unfortunately neither display:inline-block nor width:0px works in Internet Explorer up to version 8. I have not tried Internet Explorer 9. Much as I would like to ignore Internet Explorer, I can't.

The only option that works on Firefox and Internet Explorer 8 is float:left. The only slight drawback is that you have to remember to use clear:both on the element that follows the form. Of course, it will be very obvious if you forget ;-)

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try this

<fieldset>
   <legend style="max-width: max-content;" >Blah</legend>
</fieldset>

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You can always use CSS to constrain the width of the fieldset, which would also constrain the controls inside.

I find that I often have to constrain the width of select controls, or else really long option text will make it totally unmanageable.

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 fieldset {

    min-width: 0;

    max-width: 100%;

    width: 100%;
 }

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i fixed my issue by override legend style as Below

.ui-fieldset-legend
{
  font-size: 1.2em;
  font-weight: bold;
  display: inline-block;
  width: auto;`enter code here`
}

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Going further of Mihai solution, cross-browser left aligned:

<TABLE>
  <TR>
    <TD>
      <FORM>
        <FIELDSET>
          ...
        </FIELDSET>
      </FORM>
    </TD>
  </TR>
</TABLE>

Cross-browser right aligned:

<TABLE>
  <TR>
    <TD WIDTH=100%></TD>
    <TD>
      <FORM>
        <FIELDSET>
          ...
        </FIELDSET>
      </FORM>
    </TD>
  </TR>
</TABLE>

---

            <table style="position: relative; top: -0px; left: 0px;">
                <tr>
                    <td>
                        <div>   
                            <fieldset style="width:0px">
                                <legend>A legend</legend>
                                <br/>
                                <table cellspacing="0" align="left">
                                    <tbody>
                                        <tr>
                                            <td align='left' style="white-space: nowrap;">
                                            </td>
                                        </tr>
                                    </tbody>
                                </table>
                            </fieldset>
                        </div>
                    </td>
                </tr>
            </table>

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You can also put the fieldset inside a table, like so:

<table>
    <tr>
       <td>
           <fieldset>
           .......
           </fieldset>
       </td>
    </tr>
</table>