diff --git a/README.md b/README.md
index bbc5fb8..6d77d98 100644
--- a/README.md
+++ b/README.md
@@ -577,6 +577,7 @@ The [`demos` directory](demos/) includes sample projects for:
 - [`Headless Browsers`](demos/headless/)
 - [`canvas-datagrid`](demos/datagrid/)
 - [`x-spreadsheet`](demos/xspreadsheet/)
+- [`react-data-grid`](demos/react/modify/)
 - [`Swift JSC and other engines`](demos/altjs/)
 - [`"serverless" functions`](demos/function/)
 - [`internet explorer`](demos/oldie/)
diff --git a/demos/README.md b/demos/README.md
index 78f2963..eca6fd0 100644
--- a/demos/README.md
+++ b/demos/README.md
@@ -49,6 +49,7 @@ can be installed with Bash on Windows or with `cygwin`.
 - [`Headless Browsers`](headless/)
 - [`canvas-datagrid`](datagrid/)
 - [`x-spreadsheet`](xspreadsheet/)
+- [`react-data-grid`](react/modify/)
 - [`Swift JSC and other engines`](altjs/)
 - [`"serverless" functions`](function/)
 - [`internet explorer`](oldie/)
diff --git a/demos/react/README.md b/demos/react/README.md
index 5320a8b..df18f2f 100644
--- a/demos/react/README.md
+++ b/demos/react/README.md
@@ -10,16 +10,18 @@ into web pages with script tags:
 The library can also be imported directly from JSX code with:
 
 ```js
-import XLSX from 'xlsx';
+import { read, utils, writeFileXLSX } from 'xlsx';
 ```
 
 This demo shows a simple React component transpiled in the browser using Babel
 standalone library.  Since there is no standard React table model, this demo
 settles on the array of arrays approach.
 
+
 Other scripts in this demo show:
 - server-rendered React component (with `next.js`)
 - `react-native` deployment for iOS and android
+- [`react-data-grid` reading, modifying, and writing files](modify/)
 
 ## How to run
 
diff --git a/demos/react/modify/.gitignore b/demos/react/modify/.gitignore
new file mode 100644
index 0000000..4d29575
--- /dev/null
+++ b/demos/react/modify/.gitignore
@@ -0,0 +1,23 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
diff --git a/demos/react/modify/README.md b/demos/react/modify/README.md
new file mode 100644
index 0000000..97180e0
--- /dev/null
+++ b/demos/react/modify/README.md
@@ -0,0 +1,10 @@
+# react-modify
+
+This demo shows import and export with the `react-data-grid` table component.
+
+In the project directory, you can run:
+
+```bash
+$ npm install
+$ npm start
+```
diff --git a/demos/react/modify/package.json b/demos/react/modify/package.json
new file mode 100644
index 0000000..c25d145
--- /dev/null
+++ b/demos/react/modify/package.json
@@ -0,0 +1,36 @@
+{
+  "name": "react-modify-demo",
+  "dependencies": {
+    "@types/react": "^17.0.0",
+    "@types/react-dom": "^17.0.0",
+    "react": "^17.0.2",
+    "react-data-grid": "^7.0.0-beta.11",
+    "react-dom": "^17.0.2",
+    "react-scripts": "4.0.3",
+    "typescript": "^4.1.2",
+    "xlsx": "^0.18.3"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "react-app/jest"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}
diff --git a/demos/react/modify/src/components/App.tsx b/demos/react/modify/src/components/App.tsx
new file mode 100644
index 0000000..7e979d5
--- /dev/null
+++ b/demos/react/modify/src/components/App.tsx
@@ -0,0 +1,107 @@
+import React, { useState, ChangeEvent } from "react";
+import DataGrid, { TextEditor } from "react-data-grid";
+import { read, utils, WorkSheet, writeFile } from "xlsx";
+
+import "../styles/App.css";
+
+type Row = any[]; /*{
+  [index: string]: string | number;
+};*/
+
+type Column = {
+  key: string;
+  name: string;
+  editor: typeof TextEditor;
+};
+
+type DataSet = {
+  [index: string]: WorkSheet;
+};
+
+function getRowsCols(
+  data: DataSet,
+  sheetName: string
+): {
+  rows: Row[];
+  columns: Column[];
+} {
+  const rows: Row[] = utils.sheet_to_json(data[sheetName], {header:1});
+  let columns: Column[] = [];
+
+  for (let row of rows) {
+    const keys: string[] = Object.keys(row);
+
+    if (keys.length > columns.length) {
+      columns = keys.map((key) => {
+        return { key, name: utils.encode_col(+key), editor: TextEditor };
+      });
+    }
+  }
+
+  return { rows, columns };
+}
+
+export default function App() {
+  const [rows, setRows] = useState<Row[]>([]);
+  const [columns, setColumns] = useState<Column[]>([]);
+  const [workBook, setWorkBook] = useState<DataSet>({} as DataSet);
+  const [sheets, setSheets] = useState<string[]>([]);
+  const [current, setCurrent] = useState<string>("");
+
+  const exportTypes = ["xlsx", "xlsb", "csv", "html"];
+
+  function selectSheet(name: string, reset = true) {
+    if(reset) workBook[current] = utils.json_to_sheet(rows, {
+      header: columns.map((col: Column) => col.key),
+      skipHeader: true
+    });
+
+    const { rows: new_rows, columns: new_columns } = getRowsCols(workBook, name);
+
+    setRows(new_rows);
+    setColumns(new_columns);
+    setCurrent(name);
+  }
+
+  async function handleFile(ev: ChangeEvent<HTMLInputElement>): Promise<void> {
+    const file = await ev.target.files?.[0]?.arrayBuffer();
+    const data = read(file);
+
+    setWorkBook(data.Sheets);
+    setSheets(data.SheetNames);
+  }
+
+  function saveFile(ext: string): void {
+    const wb = utils.book_new();
+
+    sheets.forEach((n) => {
+      utils.book_append_sheet(wb, workBook[n], n);
+    });
+
+    writeFile(wb, "sheet." + ext);
+  }
+
+  return (
+    <>
+      <input type="file" onChange={handleFile} />
+      <div className="flex-cont">
+        {sheets.map((sheet) => (
+          <button key={sheet} onClick={(e) => selectSheet(sheet)}>
+            {sheet}
+          </button>
+        ))}
+      </div>
+      <div className="flex-cont">
+        <b>Current Sheet: {current}</b>
+      </div>
+      <DataGrid columns={columns} rows={rows} onRowsChange={setRows} />
+      <div className="flex-cont">
+        {exportTypes.map((ext) => (
+          <button key={ext} onClick={() => saveFile(ext)}>
+            export [.{ext}]
+          </button>
+        ))}
+      </div>
+    </>
+  );
+}
diff --git a/demos/react/modify/src/index.tsx b/demos/react/modify/src/index.tsx
new file mode 100644
index 0000000..270ed1a
--- /dev/null
+++ b/demos/react/modify/src/index.tsx
@@ -0,0 +1,12 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './components/App';
+
+import './styles/index.css';
+
+ReactDOM.render(
+  <React.StrictMode>
+    <App/>
+  </React.StrictMode>,
+  document.getElementById('root')
+);
diff --git a/demos/react/modify/src/react-app-env.d.ts b/demos/react/modify/src/react-app-env.d.ts
new file mode 100644
index 0000000..6431bc5
--- /dev/null
+++ b/demos/react/modify/src/react-app-env.d.ts
@@ -0,0 +1 @@
+/// <reference types="react-scripts" />
diff --git a/demos/react/modify/src/styles/App.css b/demos/react/modify/src/styles/App.css
new file mode 100644
index 0000000..28b9df9
--- /dev/null
+++ b/demos/react/modify/src/styles/App.css
@@ -0,0 +1,14 @@
+input {
+  margin: 0.5rem;
+}
+
+.flex-cont {
+  display: flex;
+  margin: 0.5rem;
+  justify-content: center;
+}
+
+.flex-cont button {
+    margin: 0.3rem;
+    padding: 0.2rem;
+}
diff --git a/demos/react/modify/src/styles/index.css b/demos/react/modify/src/styles/index.css
new file mode 100644
index 0000000..1532074
--- /dev/null
+++ b/demos/react/modify/src/styles/index.css
@@ -0,0 +1,8 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
diff --git a/demos/react/modify/tsconfig.json b/demos/react/modify/tsconfig.json
new file mode 100644
index 0000000..5136b52
--- /dev/null
+++ b/demos/react/modify/tsconfig.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noFallthroughCasesInSwitch": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx"
+  },
+  "include": [
+    "src"
+  ]
+}
diff --git a/docbits/16_demos.md b/docbits/16_demos.md
index b06eb08..b9b5629 100644
--- a/docbits/16_demos.md
+++ b/docbits/16_demos.md
@@ -34,6 +34,7 @@ The [`demos` directory](demos/) includes sample projects for:
 - [`Headless Browsers`](demos/headless/)
 - [`canvas-datagrid`](demos/datagrid/)
 - [`x-spreadsheet`](demos/xspreadsheet/)
+- [`react-data-grid`](demos/react/modify/)
 - [`Swift JSC and other engines`](demos/altjs/)
 - [`"serverless" functions`](demos/function/)
 - [`internet explorer`](demos/oldie/)