css--about visibility Setting the "collapse" value problem

1, may have used visibility on the times, the most commonly used is visible and hidden, used to make the element display or hide.

There is also a third rarely used value is collapse, except in the table row, the column uses the difference, he and hidden role is equivalent.

Let's take a look at the table elements, the collapse is how to work, but the premise is that table border-collapse need to be set to separate will have effect Oh!

Directly below the demo:

The main () code is as follows:

<table cellspacing= "0" class= "table" >  <tbody><tr>    <th>Fruits</th>    < th>vegetables</th>    <th>Rocks</th>  </tr>  <tr>    <td>apple </td>    <td>Celery</td>    <td>Granite</td>  </tr>  <tr>    <td>Orange</td>    <td>Cabbage</td>    <td>Flint</td>  </ Tr></tbody></table>

The 2.js files are as follows:

var btns = document.getelementsbytagname (' button '),    rows = document.getElementsByTagName (' tr '); Btns[0]. AddEventListener (' click ', Function () {  rows[1].classname = ' <a href= ' http://www.php1.cn/' >vc</a> ';} , false); Btns[1].addeventlistener (' click ', Function () {  rows[1].classname = ' vh ';}, False); Btns[2].addeventlistener (' Click ', function () {  rows[1].classname = ';}, False);

3. css files are as follows:

body {  text-align:center;  padding-top:20px;  Font-family:arial, Sans-serif;} Table {  border-collapse:separate;  border-spacing:5px;  Border:solid 1px black;  width:500px;  margin:0 Auto;} Th, TD {  text-align:center;  Border:solid 1px black;  padding:10px;} . VC {  visibility:collapse;}. VH {  Visibility:hidden;} button {  margin-top:5px;}

The default output is:

When you click Collapse ROW1, the following is displayed:

When you click Hide ROW1, the following is displayed:

Although collapse has hidden characteristics, the form of expression differs greatly from that of hidden; now you can make a choice according to your needs.

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