table { empty-cells: hide;}
估计你从语义上已经猜出它的作用了。它是为HTML table服务的。它会告诉浏览器,当一个table单元格里没有东西时,就隐藏它。下面的演示里,你可以点击里面按钮,它会切换empty-cells的属性值,看看table的显示有什么变化。
HTML代码
<table cellspacing="0" id="table"> <tr> <th>Fruits</th> <th>Vegetables</th> <th>Rocks</th> </tr> <tr> <td></td> <td>Celery</td> <td>Granite</td> </tr> <tr> <td>Orange</td> <td></td> <td>Flint</td> </tr></table> <button id="b" data-ec="hide">切换EMPTY-CELLS</button>
CSS代码
body { text-align: center; padding-top: 20px; font-family: Arial, sans-serif;}table { border: solid 1px black; border-collapse: separate; border-spacing: 5px; width: 500px; margin: 0 auto; empty-cells: hide; background: lightblue;}th, td { text-align: center; border: solid 1px black; padding: 10px;}button { margin-top: 20px;}
js代码
var b = document.getElementById('b'), t = document.getElementById('table');b.onclick = function () { if (this.getAttribute('data-ec') === 'hide') { t.style.emptyCells = 'show'; this.setAttribute('data-ec', 'show'); } else { t.style.emptyCells = 'hide'; this.setAttribute('data-ec', 'hide'); }};