Set the table column width constant regardless of the amount of text in its cells?

In my table I set the width of the first cell in a column to be 100px.
However, when the text in one of the cell in this column is too long, the width of the column becomes more than 100px. How could I disable this expansion?

I played with it for a bit because I had trouble figuring it out.

You need to set the cell width (either th or td worked, I set both) AND set the table-layout to fixed. For some reason, the cell width seems to only stay fixed if the table width is set, too (I think that's silly but whatev).

Also, it is useful to set the overflow property to hidden to prevent any extra text from coming out of the table.

You should make sure to leave all of the bordering and sizing for CSS, too.

Ok so here's what I have:

table {
  border: 1px solid black;
  table-layout: fixed;
  width: 200px;
}

th,
td {
  border: 1px solid black;
  width: 100px;
  overflow: hidden;
}

<table>
  <tr>
    <th>header 1</th>
    <th>header 234567895678657</th>
  </tr>
  <tr>
    <td>data asdfasdfasdfasdfasdf</td>
    <td>data 2</td>
  </tr>
</table>

Here it is in JSFiddle

This guy had a similar problem: Table cell widths - fixing width, wrapping/truncating long words

See: http://www.html5-tutorials.org/tables/changing-column-width/

After the table tag, use the col element. you don't need a closing tag.

For example, if you had three columns:

<table>
  <colgroup>
    <col style="width:40%">
    <col style="width:30%">
    <col style="width:30%">
  </colgroup>  
  <tbody>
    ...
  </tbody>
</table>

Just add <div> tag inside <td> or <th> define width inside <div>. This will help you. Nothing else works.

eg.

<td><div style="width: 50px" >...............</div></td>

If you need one ore more fixed-width columns while other columns should resize, try setting both min-width and max-width to the same value.