CSS 表格樣式 - 表格中心邊框之間的間距

Question

我想要在“a 的測量”右側邊框和“下載 b 的”左側邊框之間沿着該邊框列留一個空格，但我不確定需要什么，因為我只知道border-collapse 。 我只想要一個 2px-5px 的差距，足以告訴那里不一樣的測量。

JavaScript：

innerHTML = '<table class="tableRes" id="tableRes">\
    <thead><tr><th colspan="4">Test</th></tr></thead>\
    <tr><td>upload a</td><td>a's measurement</td><td>download b</td><td>b's measurement</td></tr>\
    <tr><td>upload c</td><td>c's measurement</td><td>download d</td><td>d's measurement</td></tr>\
    <tr><td>upload e</td><td>e's measurement</td><td>download f</td><td>f's measurement</td></tr>\
    <tr><td>upload g</td><td>g's measurement</td><td>download h</td><td>h's measurement</td></tr>\
    </table>';

CSS：

.tableRes {
  border: 1px solid black;
  border-collapse: collapse;
  background-color: #ADD8E6;
  margin-left: auto;
  margin-right: auto;
}
.th, td {
  border: 1px solid black;
}

Answer 1

您可以在每一行中插入一個空的td作為第三個單元格，並通過 css ( :nth-child(3) ) 解決該問題，使其沒有邊框和一定的寬度：

 .tableRes { border: 1px solid black; border-collapse: collapse; background-color: #ADD8E6; margin-left: auto; margin-right: auto; } th, td { border: 1px solid black; } td:nth-child(3) { width: 15px; border: none; }

 <table class= "tableRes"> <thead> <tr> <th colspan="5">Test</th> </tr> </thead> <tr> <td>upload a</td> <td>a's measurement</td> <td></td> <td>download b</td> <td>b's measurement</td> </tr> <tr> <td>upload c</td> <td>c's measurement</td> <td></td> <td>download d</td> <td>d's measurement</td> </tr> <tr> <td>upload e</td> <td>e's measurement</td> <td></td> <td>download f</td> <td>f's measurement</td> </tr> <tr> <td>upload g</td> <td>g's measurement</td> <td></td> <td>download h</td> <td>h's measurement</td> </tr> </table>

Answer 2

td {
    padding: 2px 6px; //table elements doesn't get affected by margin
}