overflow:hidden not working when using tables_问答_开发者

I’m having issues with long strings of text stretching out my tables and overflow:hidden does not seem to be doing what I exect. Here’s the sample code I am using to test this effect:

<html>
    <head>
        <style type="text/css">
            td.scroll
            {
                background-color:#00FFFF;
                width:100px;
                height:100px;
                overflow:scroll;
            }
            td.hidden 
            {
                background-color:#00FF00;
                width:100px;
                height:100px;
                overflow:hidden;
            }
        </style>
    </head>
    <body>
        <table width="100%">
            <tr>
                <td>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
                <td>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
                <td>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
            </tr>
            <tr>
                <td class="scroll">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
                <td class="scroll">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
                <td class="scroll">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa开发者_如何学Goaaaaaaaaaaaaaaaa
                </td>
            </tr>
            <tr>
                <td class="hidden">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
                <td class="hidden">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
                <td class="hidden">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
                </td>
            </tr>
        </table>
    </body>
</html>

When loaded, the text will, regardless of the table width, stretch out to display all of the string. What I’m after is to have any part of the string that would go past the cell measurement not be display. Is this even possible with tables, and if so, what am I doing wrong?

Overflow only works on block level elements. Table elements aren't block elements. If you want to get those effects put a <div> inside the table cell and apply the effects to the <div>.

td.scroll div {
  background-color: #00FFFF;
  width: 100px;
  height: 100px;
  overflow: scroll;
}

td.hidden div {
  background-color: #00FF00;
  width: 100px;
  height: 100px;
  overflow: hidden;
}

with:

<table width="100%">
<tr>
  <td><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
  <td><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
  <td><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
</tr>

<tr>
  <td class="scroll"><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
  <td class="scroll"><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
  <td class="scroll"><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
</tr>

<tr>
  <td class="hidden"><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
  <td class="hidden"><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
  <td class="hidden"><div>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div></td>
</tr>
</table>

By default the auto-table-layout mechanism expands the table width to fit the minimum cell content width. Tell it not to do that with the table-layout property:

<table width="100%" style="table-layout: fixed">

and your example works as expected. You should probably also remove the width: 100px from the table cells, since that makes no sense in combination with a 100%-width table. (Although with fixed table layout it doesn't matter, as only the first row of cells or <col>s has any bearing on the column widths.)

Note overflow: scroll or auto doesn't work for table cells in most browsers. (It does in WebKit.)

<html>
<head>
<style>
td { width: 33%; height: 2em; }
td div { width:100%;height:100%;overflow:hidden }
</style>

</head>

<body>

<table border="1" style="width:300px;">
<tr><td>x</td><td><div>y</div></td><td>z</td></tr>
<tr><td>x</td><td><div>this is going to be hidden because it is too long</div></td><td>z</td></tr>
<tr><td>x</td><td><div>y</div></td><td>z</td></tr>
</table>

</body>

</html>

Not sure if it isn't supposed to be working for table cells, but ideally you don't really want to hide them anyway. I suggest you hyphenate long words, which you can do easily with the following lib (only take few lines of js to implement):

http://code.google.com/p/hyphenator/

Example:

http://hyphenator.googlecode.com/svn/tags/Version%202.2.0/WorkingExample.html