设置是否使用JavaScript将表格边框折叠为单个边框？

若要设置是否折叠表格边框，请使用 borderCollapse属性并将其设置为折叠。您可以尝试运行以下代码来将表格边框设置为折叠-

示例

<!DOCTYPE html>
<html>
   <body>
      <table id="newTable" border="2">
         <tr>
            <th>EmpID</th>
            <th>EmpName</th>
            <th>EmpDept</th>
         </tr>
         <tr>
            <td>001</td>
            <td>Amit</td>
            <td>IT</td>
         </tr>
         <tr>
            <td>002</td>
            <td>John</td>
            <td>Finance</td>
         </tr>
         <tr>
            <td>003</td>
            <td>David</td>
            <td>Marketing</td>
         </tr>
      </table>
      <br>
      <button onclick="display()">Click to collapse</button>
      <script>
         function display() {
            document.getElementById("newTable").style.borderCollapse = "collapse";
         }
      </script>
   </body>
</html>

基础教程