Add webform demo app to /examples

examples/web-form-with-express/.env.example

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+NOTION_KEY=<your-notion-api-key>
+NOTION_PAGE_ID=<notion-page-id>

examples/web-form-with-express/README.md

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+# Notion internal integration full-stack example
+
+## Use web forms to create new databases, pages, page content, and comments
+
+### About the integration
+
+This demo shows how to build an internal integration that allows users to fill out a web form to create new Notion databases, pages, blocks (page content), and comments.
+
+![Database form submitted successfully](./public/assets/home-screen.png)
+
+This demo is referenced in the [Create an integration guide](https://developers.notion.com/docs/create-a-notion-integration) -- an introductory guide to building internal integrations and working with Notion's public API.
+
+The goal of this integration is to show how to build a full-stack app where user interactions on the frontend will trigger public API requests, and, as a result, make the corresponding updates in your Notion workspace.
+
+### File structure
+
+On the frontend, this demo includes:
+
+- `views/index.html`, which represents the app's webpage content. Users will interact with the HTML elements in this page.
+- `public/client.js`, the client-side JavaScript added to handle HTML form `submit` events.
+- `public/style.css` contains the styles for `views/index.html`.
+
+On the backend, this demo includes:
+
+- `server.js`, which serves `index.html` and defines the endpoints used in the client-side JS code. All Notion public API usage (Notion SDK for JavaScript) is included in this file.
+
+#### Notion endpoints used
+
+This demo includes the following Notion endpoint usage:
+
+- [Create a database](https://developers.notion.com/reference/create-a-database)
+- [Create a page](https://developers.notion.com/reference/post-page)
+- [Append block children](https://developers.notion.com/reference/patch-block-children)
+- [Create a comment](https://developers.notion.com/reference/create-a-comment)
+
+This demo can be expanded further to test other endpoints, as well. For example, you could add a button retrieve all database pages or to delete existing pages.
+
+Some "real-world" applications include expanding this demo to be a blog and using a Notion workspace as a CMS. Additionally, the functionality could also be repurposed to receive app feedback from users.
+
+---
+
+### Running locally
+
+#### 1. Set up your local project
+
+```zsh
+# Clone this repository locally
+git clone https://github.com/makenotion/notion-sdk-js.git
+
+# Switch into this project
+cd notion-sdk-js/examples/web-form-with-express/
+
+# Install the dependencies
+npm install
+```
+
+#### 2. Set your environment variables in a `.env` file
+
+A `.env.example` file has been included and can be renamed `.env`. Update the environment variables below:
+
+```zsh
+NOTION_KEY=<your-notion-api-key>
+NOTION_PAGE_ID=<notion-page-id>
+```
+
+`NOTION_KEY`: Create a new integration in the [integrations dashboard](https://www.notion.com/my-integrations) and retrieve the API key from the integration's `Secrets` page.
+
+`NOTION_PAGE_ID`: Use the ID of any Notion page you want to add databases to. This page will be the parent of all content created through this integration.
+
+The page ID is the 32 character string at the end of any page URL.
+![A Notion page URL with the ID highlighted](./public/assets//page_id.png)
+
+#### 3. Give the integration access to your page
+
+Your Notion integration will need permission to create new databases, etc. To provide access, do the following:
+
+1. Go to the page in your workspace.
+2. Click the `•••` (more menu) on the top-right corner of the page.
+3. Scroll to the bottom of the menu and click `Add connections`.
+4. Search for and select your integration in the `Search for connections...` menu.
+
+Once selected, your integration will have permission to read/write content on the page.
+
+**Note**: For the `Add a comment` form to work, you must give your integration permission to read/write comments. To update integration capabilities, visit the `Capabilities` tab in the [integrations dashboard](https://www.notion.com/my-integrations).
+
+#### 4. Run code
+
+Run the following command:
+
+```zsh
+node server.js
+```
+
+Check the terminal response to see which port to use when viewing the app locally in your browser of choice (`localhost:<port>`).
+
+Keep the browser console open to see API responses, including errors.
+
+### Using this app
+
+To use this demo app, start by creating a new database via the database form:
+![Database form UI](./public/assets/home-screen.png)
+
+The ID of the new database can be used in the next form to create a new page:
+![Page form UI](./public/assets/page-form.png)
+
+The blocks and comment forms will accept the page ID that is returned from the page form to create new page content (blocks) and comments.
+![Blocks form UI](./public/assets/blocks-form.png)
+![Comments form UI](./public/assets/comment-form.png)
+
+If you have the IDs for other databases/pages, you can use them as long as you have shared the target databases/pages with the internal integration.
+
+To learn more about this demo, read the [Create an integration guide](https://developers.notion.com/docs/create-a-notion-integration), which steps through how this code works.
+
+(Thanks to [Glitch](https://glitch.com/) for the starter app used while creating this demo!)

examples/web-form-with-express/package.json

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+{
+  "name": "web-form-with-express-example",
+  "version": "1.0.0",
+  "description": "Internal Notion intergration demo app using Express.js for a server.",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "@notionhq/client": "^2.2.7",
+    "dotenv": "^16.3.1",
+    "express": "^4.18.2"
+  },
+  "engines": {
+    "node": "14.x"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/makenotion/notion-sdk-js.git"
+  },
+  "author": "Jess Mitchell",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/makenotion/notion-sdk-js/issues"
+  },
+  "keywords": [
+    "node",
+    "notion",
+    "express"
+  ]
+}

examples/web-form-with-express/public/client.js

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+// This file is run by the browser each time your view template is loaded
+
+/**
+ * Define variables that reference elements included in /views/index.html:
+ */
+
+// Forms
+const dbForm = document.getElementById("databaseForm")
+const pageForm = document.getElementById("pageForm")
+const blocksForm = document.getElementById("blocksForm")
+const commentForm = document.getElementById("commentForm")
+
+// Table cells where API responses will be appended
+const dbResponseEl = document.getElementById("dbResponse")
+const pageResponseEl = document.getElementById("pageResponse")
+const blocksResponseEl = document.getElementById("blocksResponse")
+const commentResponseEl = document.getElementById("commentResponse")
+
+/**
+ * Functions to handle appending new content to /views/index.html
+ */
+
+// Appends the API response to the UI
+const appendApiResponse = function (apiResponse, el) {
+  console.log(apiResponse)
+
+  // Add success message to UI
+  const newParagraphSuccessMsg = document.createElement("p")
+  newParagraphSuccessMsg.innerHTML = "Result: " + apiResponse.message
+  el.appendChild(newParagraphSuccessMsg)
+  // See browser console for more information
+  if (apiResponse.message === "error") return
+
+  // Add ID of Notion item (db, page, comment) to UI
+  const newParagraphId = document.createElement("p")
+  newParagraphId.innerHTML = "ID: " + apiResponse.data.id
+  el.appendChild(newParagraphId)
+
+  // Add URL of Notion item (db, page) to UI
+  if (apiResponse.data.url) {
+    const newAnchorTag = document.createElement("a")
+    newAnchorTag.setAttribute("href", apiResponse.data.url)
+    newAnchorTag.innerText = apiResponse.data.url
+    el.appendChild(newAnchorTag)
+  }
+}
+
+// Appends the blocks API response to the UI
+const appendBlocksResponse = function (apiResponse, el) {
+  console.log(apiResponse)
+
+  // Add success message to UI
+  const newParagraphSuccessMsg = document.createElement("p")
+  newParagraphSuccessMsg.innerHTML = "Result: " + apiResponse.message
+  el.appendChild(newParagraphSuccessMsg)
+
+  // Add block ID to UI
+  const newParagraphId = document.createElement("p")
+  newParagraphId.innerHTML = "ID: " + apiResponse.data.results[0].id
+  el.appendChild(newParagraphId)
+}
+
+/**
+ * Attach submit event handlers to each form included in /views/index.html
+ */
+
+// Attach submit event to each form
+dbForm.onsubmit = async function (event) {
+  event.preventDefault()
+
+  const dbName = event.target.dbName.value
+  const body = JSON.stringify({ dbName })
+
+  const newDBResponse = await fetch("/databases", {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body,
+  })
+  const newDBData = await newDBResponse.json()
+
+  appendApiResponse(newDBData, dbResponseEl)
+}
+
+pageForm.onsubmit = async function (event) {
+  event.preventDefault()
+
+  const dbID = event.target.newPageDB.value
+  const pageName = event.target.newPageName.value
+  const header = event.target.header.value
+  const body = JSON.stringify({ dbID, pageName, header })
+
+  const newPageResponse = await fetch("/pages", {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body,
+  })
+
+  const newPageData = await newPageResponse.json()
+  appendApiResponse(newPageData, pageResponseEl)
+}
+
+blocksForm.onsubmit = async function (event) {
+  event.preventDefault()
+
+  const pageID = event.target.pageID.value
+  const content = event.target.content.value
+  const body = JSON.stringify({ pageID, content })
+
+  const newBlockResponse = await fetch("/blocks", {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body,
+  })
+
+  const newBlockData = await newBlockResponse.json()
+  appendBlocksResponse(newBlockData, blocksResponseEl)
+}
+
+commentForm.onsubmit = async function (event) {
+  event.preventDefault()
+
+  const pageID = event.target.pageIDComment.value
+  const comment = event.target.comment.value
+  const body = JSON.stringify({ pageID, comment })
+
+  const newCommentResponse = await fetch("/comments", {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body,
+  })
+
+  const newCommentData = await newCommentResponse.json()
+  appendApiResponse(newCommentData, commentResponseEl)
+}

examples/web-form-with-express/public/style.css

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+/* this file is loaded by index.html and styles the page */
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  font-family: sans-serif;
+  margin: 2em 1em;
+  line-height: 1.5em;
+}
+
+h1 {
+  color: #7171d1;
+  max-width: calc(100% - 5rem);
+  line-height: 1.1;
+}
+
+table {
+  width: 100%;
+}
+
+th {
+  text-align: left;
+}
+
+td {
+  width: 50%;
+  word-break: break-all;
+}
+
+form {
+  background-color: #eee;
+  display: grid;
+  grid-gap: 1em;
+  padding: 1em;
+  max-width: 40ch;
+}
+
+input {
+  border: 1px solid silver;
+  display: block;
+  font-size: 16px;
+  margin-bottom: 10px;
+  padding: 5px;
+  width: 100%;
+}
+
+form input[type="submit"] {
+  background-color: #bbbbf2;
+  border: 2px solid currentColor;
+  border-radius: 0.25em;
+  cursor: pointer;
+  font-size: inherit;
+  line-height: 1.4em;
+  padding: 0.25em 1em;
+  max-width: 20ch;
+  cursor: pointer;
+  margin-left: auto;
+}
+
+form input[type="submit"]:hover {
+  background-color: #9292d3;
+}
+
+form input[type="submit"]:active {
+  background-color: #b2b2d5;
+}
+
+footer {
+  margin-top: 3em;
+  padding-top: 1.5em;
+  border-top: 1px solid lightgrey;
+}