該方案增加了表行for each客戶端和內(nèi)部的table row，一個(gè)td客戶端的每一個(gè)值（如姓名，IP，值等）。這些值和客戶端設(shè)置在一個(gè)key/value object或dictionary稱為clientel.我已將程序設(shè)置如下：let clientel = {  socket101: ['Rick', '192.590.49.1', 'Win10', 'Norway', '15:49.00'],  socket102: ['Anthony', '192.90.897.0', 'Win7', 'Negritine', '19:19:38']};function man_table() {  const table = document.getElementById('table-body');  for (let i, client in clientel) {    let row = table.insertRow(i);    let index = row.insertCell(0);    let name = row.insertCell(1);    let ip = row.insertCell(2);    let os = row.insertCell(3);    let country = row.insertCell(4);    let timee = row.insertCell(5);    index.innerHTML = i;    name.innerHTML = client[0];    ip.innerHTML = client[1];    os.innerHTML = client[2];    country.innerHTML = client[3];    timee.innerHTML = client[4];  }};function roomba() {  for (let client in clientel) {    console.log(client)  }};我有按 em' 時(shí)執(zhí)行功能的按鈕，但出于某種原因，它說(shuō)clientel未定義？