我给予个例子供大家参考：

function genTable() {
  let table = document.createElement("Table");
  let row = table.insertRow();
  let cell = row.insertCell();
  cell.innerHTML = "a";
  cell = row.insertCell();
  cell.innerHTML = "<button onclick='edit(this)'>Edit</button>";
  document.body.appendChild(table);
}

function edit(element) {
  let thisRow = element.parentNode.parentNode;
  for (let i = 0; i < thisRow.cells.length-1; i++) {
    let cell = thisRow.cells[i];
    cell.contentEditable = true;
  }
}

<button onclick="genTable()">
Generate a Table
</button>