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<table class="orders" border="1">

<template class="item">
    <th class="id"></th>
    <td class="title"></td>




                // 取得模板,透過取得 HTML 以後複製一份
var getTemplate = function (){
  var html = $("template.item").html();
  return $(html).clone();

// 假設這是 AJAX 取得的資料
var ajaxData = function (){
  return [{
    id: 1,
    title: '蔬菜'
  }, {
    id: 2,
    title: '水果'

$(function (){
  // 開始
  var data = ajaxData()
  var temp = getTemplate()
  // 準備一個用來組合的 html 編碼的變數
  var mix = '';
  // 批次組合
  $.each(data, function (key, ele){
    // 必須要使用 outerHTML 才能取得根節點 <tr>
    mix += temp[0].outerHTML
  // 迴圈結合後再一次寫入 html 可以減少效能負擔