如何使用 JavaScript 实现动态生成表格功能？

<div id="tableContainer"></div>

var tableData = [
  { name: '张三', age: 20, gender: '男' },
  { name: '李四', age: 25, gender: '女' },
  { name: '王五', age: 30, gender: '男' }
];

function generateTable(tableData) {
  var container = document.getElementById('tableContainer');
  var table = document.createElement('table');
  var thead = document.createElement('thead');
  var tbody = document.createElement('tbody');

  // 生成表头
  var theadRow = document.createElement('tr');
  for (var key in tableData[0]) {
    var th = document.createElement('th');
    th.appendChild(document.createTextNode(key));
    theadRow.appendChild(th);
  }
  thead.appendChild(theadRow);
  table.appendChild(thead);

  // 生成表格内容
  for (var i = 0; i < tableData.length; i++) {
    var tbodyRow = document.createElement('tr');
    for (var key in tableData[i]) {
      var td = document.createElement('td');
      td.appendChild(document.createTextNode(tableData[i][key]));
      tbodyRow.appendChild(td);
    }
    tbody.appendChild(tbodyRow);
  }
  table.appendChild(tbody);

  container.appendChild(table);
}

window.onload = function() {
  generateTable(tableData);
};