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+<!DOCTYPE html>
+<html lang="zh">
+<head>
+<meta charset="UTF-8" />
+<title>主子表分页编辑 Demo</title>
+<style>
+  body {
+    font-family: Arial;
+    padding: 20px;
+    background: #f5f6f8;
+  }
+
+  .container {
+    background: #fff;
+    padding: 16px;
+    border-radius: 10px;
+  }
+
+  h2 {
+    margin: 10px 0;
+  }
+
+  /* 主表 */
+  .form-row {
+    display: flex;
+    gap: 10px;
+    margin-bottom: 10px;
+  }
+
+  input {
+    padding: 6px;
+    flex: 1;
+  }
+
+  /* 表格 */
+  table {
+    width: 100%;
+    border-collapse: collapse;
+    margin-top: 10px;
+  }
+
+  th, td {
+    border: 1px solid #ddd;
+    padding: 6px;
+    text-align: left;
+  }
+
+  td input {
+    width: 100%;
+    border: none;
+    outline: none;
+  }
+
+  /* 分页 */
+  .pager {
+    margin-top: 10px;
+    display: flex;
+    gap: 10px;
+    align-items: center;
+  }
+
+  button {
+    padding: 5px 10px;
+    cursor: pointer;
+  }
+
+  .tag {
+    font-size: 12px;
+    padding: 2px 6px;
+    background: #ffecb3;
+    border-radius: 4px;
+  }
+
+  .deleted {
+    background: #ffe5e5;
+    text-decoration: line-through;
+  }
+
+  .toolbar {
+    margin-top: 10px;
+    display: flex;
+    gap: 10px;
+  }
+</style>
+</head>
+
+<body>
+
+<div class="container">
+
+  <h2>主表</h2>
+  <div class="form-row">
+    <input id="mainName" placeholder="主表名称" />
+    <input id="mainCode" placeholder="主表编码" />
+  </div>
+
+  <h2>子表（分页编辑）</h2>
+
+  <div class="toolbar">
+    <button onclick="addRow()">新增行</button>
+    <button onclick="submitAll()">提交全部</button>
+  </div>
+
+  <table>
+    <thead>
+      <tr>
+        <th>ID</th>
+        <th>名称</th>
+        <th>数量</th>
+        <th>操作</th>
+      </tr>
+    </thead>
+    <tbody id="tbody"></tbody>
+  </table>
+
+  <div class="pager">
+    <button onclick="prevPage()">上一页</button>
+    <span id="pageInfo"></span>
+    <button onclick="nextPage()">下一页</button>
+  </div>
+
+</div>
+
+<script>
+/**
+ * =========================
+ * 模拟后端数据
+ * =========================
+ */
+const serverData = [];
+for (let i = 1; i <= 50; i++) {
+  serverData.push({
+    id: i,
+    name: "物料-" + i,
+    qty: Math.floor(Math.random() * 100)
+  });
+}
+
+/**
+ * =========================
+ * 核心状态
+ * =========================
+ */
+let page = 1;
+const pageSize = 5;
+
+// ⭐ 子表缓存（核心）
+const cache = new Map();
+
+/**
+ * =========================
+ * 拉取数据（模拟分页接口）
+ * =========================
+ */
+function fetchPageData(page) {
+  const start = (page - 1) * pageSize;
+  const list = serverData.slice(start, start + pageSize);
+
+  return list.map(item => {
+    const cached = cache.get(item.id);
+    return cached ? { ...item, ...cached } : item;
+  });
+}
+
+/**
+ * =========================
+ * 渲染表格
+ * =========================
+ */
+function render() {
+  const data = fetchPageData(page);
+  const tbody = document.getElementById("tbody");
+
+  tbody.innerHTML = "";
+
+  data.forEach(row => {
+    if (row._deleted) return;
+
+    const tr = document.createElement("tr");
+
+    if (row.isNew) tr.classList.add("deleted");
+
+    tr.innerHTML = `
+      <td>${row.id}</td>
+      <td>
+        <input value="${row.name || ""}" 
+          onchange="onEdit(${row.id}, 'name', this.value)" />
+      </td>
+      <td>
+        <input value="${row.qty || 0}" 
+          onchange="onEdit(${row.id}, 'qty', this.value)" />
+      </td>
+      <td>
+        ${row.isNew ? '<span class="tag">新增</span>' : ''}
+        <button onclick="removeRow(${row.id})">删除</button>
+      </td>
+    `;
+
+    tbody.appendChild(tr);
+  });
+
+  document.getElementById("pageInfo").innerText =
+    `第 ${page} / ${Math.ceil(serverData.length / pageSize)} 页`;
+}
+
+/**
+ * =========================
+ * 编辑缓存
+ * =========================
+ */
+function onEdit(id, field, value) {
+  const old = cache.get(id) || { id };
+  const updated = { ...old, [field]: value, isDirty: true };
+  cache.set(id, updated);
+}
+
+/**
+ * =========================
+ * 新增
+ * =========================
+ */
+function addRow() {
+  const tempId = "tmp_" + Date.now();
+
+  const newRow = {
+    id: tempId,
+    name: "",
+    qty: 0,
+    isNew: true
+  };
+
+  cache.set(tempId, newRow);
+  serverData.unshift(newRow); // 模拟插入数据源
+  render();
+}
+
+/**
+ * =========================
+ * 删除（逻辑删除）
+ * =========================
+ */
+function removeRow(id) {
+  const row = cache.get(id) || { id };
+  cache.set(id, { ...row, _deleted: true });
+  render();
+}
+
+/**
+ * =========================
+ * 分页
+ * =========================
+ */
+function prevPage() {
+  if (page > 1) {
+    page--;
+    render();
+  }
+}
+
+function nextPage() {
+  if (page < Math.ceil(serverData.length / pageSize)) {
+    page++;
+    render();
+  }
+}
+
+/**
+ * =========================
+ * 提交全部（核心）
+ * =========================
+ */
+function submitAll() {
+  const all = Array.from(cache.values());
+
+  const inserted = all.filter(i => i.isNew);
+  const updated = all.filter(i => i.isDirty && !i.isNew);
+  const deleted = all.filter(i => i._deleted);
+
+  console.log("主表：", {
+    name: document.getElementById("mainName").value,
+    code: document.getElementById("mainCode").value
+  });
+
+  console.log("新增：", inserted);
+  console.log("修改：", updated);
+  console.log("删除：", deleted);
+
+  alert("数据已输出到控制台（F12查看）");
+}
+
+/**
+ * init
+ */
+render();
+</script>
+
+</body>
+</html>
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