diff --git a/simple-mind-map/bin/server.mjs b/simple-mind-map/bin/server.mjs
new file mode 100644
index 00000000..23efb3a7
--- /dev/null
+++ b/simple-mind-map/bin/server.mjs
@@ -0,0 +1,152 @@
+#!/usr/bin/env node
+
+import ws from 'ws'
+import http from 'http'
+import * as map from 'lib0/map'
+
+const wsReadyStateConnecting = 0
+const wsReadyStateOpen = 1
+const wsReadyStateClosing = 2 // eslint-disable-line
+const wsReadyStateClosed = 3 // eslint-disable-line
+
+const pingTimeout = 30000
+
+const port = process.env.PORT || 4444
+// @ts-ignore
+const wss = new ws.Server({ noServer: true })
+
+const server = http.createServer((request, response) => {
+  response.writeHead(200, { 'Content-Type': 'text/plain' })
+  response.end('okay')
+})
+
+/**
+ * Map froms topic-name to set of subscribed clients.
+ * @type {Map<string, Set<any>>}
+ */
+const topics = new Map()
+
+/**
+ * @param {any} conn
+ * @param {object} message
+ */
+const send = (conn, message) => {
+  if (
+    conn.readyState !== wsReadyStateConnecting &&
+    conn.readyState !== wsReadyStateOpen
+  ) {
+    conn.close()
+  }
+  try {
+    conn.send(JSON.stringify(message))
+  } catch (e) {
+    conn.close()
+  }
+}
+
+/**
+ * Setup a new client
+ * @param {any} conn
+ */
+const onconnection = conn => {
+  /**
+   * @type {Set<string>}
+   */
+  const subscribedTopics = new Set()
+  let closed = false
+  // Check if connection is still alive
+  let pongReceived = true
+  const pingInterval = setInterval(() => {
+    if (!pongReceived) {
+      conn.close()
+      clearInterval(pingInterval)
+    } else {
+      pongReceived = false
+      try {
+        conn.ping()
+      } catch (e) {
+        conn.close()
+      }
+    }
+  }, pingTimeout)
+  conn.on('pong', () => {
+    pongReceived = true
+  })
+  conn.on('close', () => {
+    subscribedTopics.forEach(topicName => {
+      const subs = topics.get(topicName) || new Set()
+      subs.delete(conn)
+      if (subs.size === 0) {
+        topics.delete(topicName)
+      }
+    })
+    subscribedTopics.clear()
+    closed = true
+  })
+  conn.on(
+    'message',
+    /** @param {object} message */ message => {
+      if (typeof message === 'string') {
+        message = JSON.parse(message)
+      }
+      if (message && message.type && !closed) {
+        switch (message.type) {
+          case 'subscribe':
+            /** @type {Array<string>} */ ;(message.topics || []).forEach(
+              topicName => {
+                if (typeof topicName === 'string') {
+                  // add conn to topic
+                  const topic = map.setIfUndefined(
+                    topics,
+                    topicName,
+                    () => new Set()
+                  )
+                  topic.add(conn)
+                  // add topic to conn
+                  subscribedTopics.add(topicName)
+                }
+              }
+            )
+            break
+          case 'unsubscribe':
+            /** @type {Array<string>} */ ;(message.topics || []).forEach(
+              topicName => {
+                const subs = topics.get(topicName)
+                if (subs) {
+                  subs.delete(conn)
+                }
+              }
+            )
+            break
+          case 'publish':
+            if (message.topic) {
+              const receivers = topics.get(message.topic)
+              if (receivers) {
+                message.clients = receivers.size
+                receivers.forEach(receiver => send(receiver, message))
+              }
+            }
+            break
+          case 'ping':
+            send(conn, { type: 'pong' })
+        }
+      }
+    }
+  )
+}
+wss.on('connection', onconnection)
+
+server.on('upgrade', (request, socket, head) => {
+  // You may check auth of request here..
+  /**
+   * @param {any} ws
+   */
+  const handleAuth = ws => {
+    wss.emit('connection', ws, request)
+  }
+  wss.handleUpgrade(request, socket, head, handleAuth)
+})
+
+server.listen(port)
+
+console.log('Signaling server running on localhost:', port)
diff --git a/simple-mind-map/package-lock.json b/simple-mind-map/package-lock.json
index 5efac16e..f3e0ec0b 100644
--- a/simple-mind-map/package-lock.json
+++ b/simple-mind-map/package-lock.json
@@ -18,7 +18,9 @@
         "quill": "^1.3.6",
         "tern": "^0.24.3",
         "uuid": "^9.0.0",
-        "xml-js": "^1.6.11"
+        "xml-js": "^1.6.11",
+        "y-webrtc": "^10.2.5",
+        "yjs": "^13.6.8"
       },
       "devDependencies": {
         "eslint": "^8.25.0",
@@ -290,6 +292,25 @@
         "node": ">= 0.6.0"
       }
     },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -310,6 +331,29 @@
         "node": ">= 0.4.0"
       }
     },
+    "node_modules/buffer": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
+      "integrity": "sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.2.1"
+      }
+    },
     "node_modules/call-bind": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.2.tgz",
@@ -574,6 +618,11 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/err-code": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/err-code/-/err-code-3.0.1.tgz",
+      "integrity": "sha512-GiaH0KJUewYok+eeY05IIgjtAe4Yltygk9Wqp1V5yVWLdhf0hYZchRjNIT9bb0mSwRcIusT3cx7PJUf3zEIfUA=="
+    },
     "node_modules/errno": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/errno/-/errno-0.1.8.tgz",
@@ -873,6 +922,11 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/get-browser-rtc": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/get-browser-rtc/-/get-browser-rtc-1.1.0.tgz",
+      "integrity": "sha512-MghbMJ61EJrRsDe7w1Bvqt3ZsBuqhce5nrn/XAwgwOXhcsz53/ltdxOse1h/8eKXj5slzxdsz56g5rzOFSGwfQ=="
+    },
     "node_modules/get-intrinsic": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.0.tgz",
@@ -1012,6 +1066,25 @@
         "node": ">=8.0.0"
       }
     },
+    "node_modules/ieee754": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
+      "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/ignore": {
       "version": "5.2.4",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.2.4.tgz",
@@ -1150,6 +1223,15 @@
       "integrity": "sha512-RHxMLp9lnKHGHRng9QFhRCMbYAcVpn69smSGcq3f36xjgVVWThj4qqLbTLlq7Ssj8B+fIQ1EuCEGI2lKsyQeIw==",
       "dev": true
     },
+    "node_modules/isomorphic.js": {
+      "version": "0.2.5",
+      "resolved": "https://registry.npmjs.org/isomorphic.js/-/isomorphic.js-0.2.5.tgz",
+      "integrity": "sha512-PIeMbHqMt4DnUP3MA/Flc0HElYjMXArsw1qwJZcm9sqR8mq3l8NYizFMty0pWwE/tzIGH3EKK5+jes5mAr85yw==",
+      "funding": {
+        "type": "GitHub Sponsors ❤",
+        "url": "https://github.com/sponsors/dmonad"
+      }
+    },
     "node_modules/js-sdsl": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/js-sdsl/-/js-sdsl-4.2.0.tgz",
@@ -1248,6 +1330,25 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/lib0": {
+      "version": "0.2.86",
+      "resolved": "https://registry.npmjs.org/lib0/-/lib0-0.2.86.tgz",
+      "integrity": "sha512-kxigQTM4Q7NwJkEgdqQvU21qiR37twcqqLmh+/SbiGbRLfPlLVbHyY9sWp7PwXh0Xus9ELDSjsUOwcrdt5yZ4w==",
+      "dependencies": {
+        "isomorphic.js": "^0.2.4"
+      },
+      "bin": {
+        "0gentesthtml": "bin/gentesthtml.js",
+        "0serve": "bin/0serve.js"
+      },
+      "engines": {
+        "node": ">=16"
+      },
+      "funding": {
+        "type": "GitHub Sponsors ❤",
+        "url": "https://github.com/sponsors/dmonad"
+      }
+    },
     "node_modules/lie": {
       "version": "3.3.0",
       "resolved": "https://registry.npmjs.org/lie/-/lie-3.3.0.tgz",
@@ -1960,7 +2061,6 @@
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz",
       "integrity": "sha512-NuaNSa6flKT5JaSYQzJok04JzTL1CA6aGhv5rfLW3PgqA+M2ChpZQnAC8h8i4ZFkBS8X5RqkDBHA7r4hej3K9A==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -2016,6 +2116,14 @@
         "performance-now": "^2.1.0"
       }
     },
+    "node_modules/randombytes": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/randombytes/-/randombytes-2.1.0.tgz",
+      "integrity": "sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==",
+      "dependencies": {
+        "safe-buffer": "^5.1.0"
+      }
+    },
     "node_modules/readable-stream": {
       "version": "2.3.7",
       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
@@ -2176,6 +2284,47 @@
         "node": ">=8"
       }
     },
+    "node_modules/simple-peer": {
+      "version": "9.11.1",
+      "resolved": "https://registry.npmjs.org/simple-peer/-/simple-peer-9.11.1.tgz",
+      "integrity": "sha512-D1SaWpOW8afq1CZGWB8xTfrT3FekjQmPValrqncJMX7QFl8YwhrPTZvMCANLtgBwwdS+7zURyqxDDEmY558tTw==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "dependencies": {
+        "buffer": "^6.0.3",
+        "debug": "^4.3.2",
+        "err-code": "^3.0.1",
+        "get-browser-rtc": "^1.1.0",
+        "queue-microtask": "^1.2.3",
+        "randombytes": "^2.1.0",
+        "readable-stream": "^3.6.0"
+      }
+    },
+    "node_modules/simple-peer/node_modules/readable-stream": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/stackblur-canvas": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/stackblur-canvas/-/stackblur-canvas-2.5.0.tgz",
@@ -2410,6 +2559,27 @@
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
     },
+    "node_modules/ws": {
+      "version": "7.5.9",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.9.tgz",
+      "integrity": "sha512-F+P9Jil7UiSKSkppIiD94dN07AwvFixvLIj1Og1Rl9GGMuNipJnV9JzjD6XuqmAeiswGvUmNLjr5cFuXwNS77Q==",
+      "optional": true,
+      "engines": {
+        "node": ">=8.3.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/xml-js": {
       "version": "1.6.11",
       "resolved": "https://registry.npmjs.org/xml-js/-/xml-js-1.6.11.tgz",
@@ -2421,6 +2591,65 @@
         "xml-js": "bin/cli.js"
       }
     },
+    "node_modules/y-protocols": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/y-protocols/-/y-protocols-1.0.6.tgz",
+      "integrity": "sha512-vHRF2L6iT3rwj1jub/K5tYcTT/mEYDUppgNPXwp8fmLpui9f7Yeq3OEtTLVF012j39QnV+KEQpNqoN7CWU7Y9Q==",
+      "license": "MIT",
+      "dependencies": {
+        "lib0": "^0.2.85"
+      },
+      "engines": {
+        "node": ">=16.0.0",
+        "npm": ">=8.0.0"
+      },
+      "funding": {
+        "type": "GitHub Sponsors ❤",
+        "url": "https://github.com/sponsors/dmonad"
+      },
+      "peerDependencies": {
+        "yjs": "^13.0.0"
+      }
+    },
+    "node_modules/y-webrtc": {
+      "version": "10.2.5",
+      "resolved": "https://registry.npmjs.org/y-webrtc/-/y-webrtc-10.2.5.tgz",
+      "integrity": "sha512-ZyBNvTI5L28sQ2PQI0T/JvyWgvuTq05L21vGkIlcvNLNSJqAaLCBJRe3FHEqXoaogqWmRcEAKGfII4ErNXMnNw==",
+      "dependencies": {
+        "lib0": "^0.2.42",
+        "simple-peer": "^9.11.0",
+        "y-protocols": "^1.0.5"
+      },
+      "bin": {
+        "y-webrtc-signaling": "bin/server.js"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "type": "GitHub Sponsors ❤",
+        "url": "https://github.com/sponsors/dmonad"
+      },
+      "optionalDependencies": {
+        "ws": "^7.2.0"
+      }
+    },
+    "node_modules/yjs": {
+      "version": "13.6.8",
+      "resolved": "https://registry.npmjs.org/yjs/-/yjs-13.6.8.tgz",
+      "integrity": "sha512-ZPq0hpJQb6f59B++Ngg4cKexDJTvfOgeiv0sBc4sUm8CaBWH7OQC4kcCgrqbjJ/B2+6vO49exvTmYfdlPtcjbg==",
+      "dependencies": {
+        "lib0": "^0.2.74"
+      },
+      "engines": {
+        "node": ">=16.0.0",
+        "npm": ">=8.0.0"
+      },
+      "funding": {
+        "type": "GitHub Sponsors ❤",
+        "url": "https://github.com/sponsors/dmonad"
+      }
+    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
@@ -2628,6 +2857,11 @@
       "integrity": "sha512-I3yl4r9QB5ZRY3XuJVEPfc2XhZO6YweFPI+UovAzn+8/hb3oJ6lnysaFcjVpkCPfVWFUDvoZ8kmVDP7WyRtYtQ==",
       "optional": true
     },
+    "base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA=="
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -2642,6 +2876,15 @@
       "resolved": "https://registry.npmjs.org/btoa/-/btoa-1.2.1.tgz",
       "integrity": "sha512-SB4/MIGlsiVkMcHmT+pSmIPoNDoHg+7cMzmt3Uxt628MTz2487DKSqK/fuhFBrkuqrYv5UCEnACpF4dTFNKc/g=="
     },
+    "buffer": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
+      "integrity": "sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==",
+      "requires": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.2.1"
+      }
+    },
     "call-bind": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.2.tgz",
@@ -2834,6 +3077,11 @@
         "tapable": "^0.2.3"
       }
     },
+    "err-code": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/err-code/-/err-code-3.0.1.tgz",
+      "integrity": "sha512-GiaH0KJUewYok+eeY05IIgjtAe4Yltygk9Wqp1V5yVWLdhf0hYZchRjNIT9bb0mSwRcIusT3cx7PJUf3zEIfUA=="
+    },
     "errno": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/errno/-/errno-0.1.8.tgz",
@@ -3066,6 +3314,11 @@
       "resolved": "https://registry.npmjs.org/functions-have-names/-/functions-have-names-1.2.3.tgz",
       "integrity": "sha512-xckBUXyTIqT97tq2x2AMb+g163b5JFysYk0x4qxNFwbfQkmNZoiRHb6sPzI9/QV33WeuvVYBUIiD4NzNIyqaRQ=="
     },
+    "get-browser-rtc": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/get-browser-rtc/-/get-browser-rtc-1.1.0.tgz",
+      "integrity": "sha512-MghbMJ61EJrRsDe7w1Bvqt3ZsBuqhce5nrn/XAwgwOXhcsz53/ltdxOse1h/8eKXj5slzxdsz56g5rzOFSGwfQ=="
+    },
     "get-intrinsic": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.0.tgz",
@@ -3163,6 +3416,11 @@
         "text-segmentation": "^1.0.3"
       }
     },
+    "ieee754": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
+      "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA=="
+    },
     "ignore": {
       "version": "5.2.4",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.2.4.tgz",
@@ -3262,6 +3520,11 @@
       "integrity": "sha512-RHxMLp9lnKHGHRng9QFhRCMbYAcVpn69smSGcq3f36xjgVVWThj4qqLbTLlq7Ssj8B+fIQ1EuCEGI2lKsyQeIw==",
       "dev": true
     },
+    "isomorphic.js": {
+      "version": "0.2.5",
+      "resolved": "https://registry.npmjs.org/isomorphic.js/-/isomorphic.js-0.2.5.tgz",
+      "integrity": "sha512-PIeMbHqMt4DnUP3MA/Flc0HElYjMXArsw1qwJZcm9sqR8mq3l8NYizFMty0pWwE/tzIGH3EKK5+jes5mAr85yw=="
+    },
     "js-sdsl": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/js-sdsl/-/js-sdsl-4.2.0.tgz",
@@ -3338,6 +3601,14 @@
         "type-check": "~0.4.0"
       }
     },
+    "lib0": {
+      "version": "0.2.86",
+      "resolved": "https://registry.npmjs.org/lib0/-/lib0-0.2.86.tgz",
+      "integrity": "sha512-kxigQTM4Q7NwJkEgdqQvU21qiR37twcqqLmh+/SbiGbRLfPlLVbHyY9sWp7PwXh0Xus9ELDSjsUOwcrdt5yZ4w==",
+      "requires": {
+        "isomorphic.js": "^0.2.4"
+      }
+    },
     "lie": {
       "version": "3.3.0",
       "resolved": "https://registry.npmjs.org/lie/-/lie-3.3.0.tgz",
@@ -3765,8 +4036,7 @@
     "queue-microtask": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz",
-      "integrity": "sha512-NuaNSa6flKT5JaSYQzJok04JzTL1CA6aGhv5rfLW3PgqA+M2ChpZQnAC8h8i4ZFkBS8X5RqkDBHA7r4hej3K9A==",
-      "dev": true
+      "integrity": "sha512-NuaNSa6flKT5JaSYQzJok04JzTL1CA6aGhv5rfLW3PgqA+M2ChpZQnAC8h8i4ZFkBS8X5RqkDBHA7r4hej3K9A=="
     },
     "quill": {
       "version": "1.3.6",
@@ -3807,6 +4077,14 @@
         "performance-now": "^2.1.0"
       }
     },
+    "randombytes": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/randombytes/-/randombytes-2.1.0.tgz",
+      "integrity": "sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==",
+      "requires": {
+        "safe-buffer": "^5.1.0"
+      }
+    },
     "readable-stream": {
       "version": "2.3.7",
       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
@@ -3916,6 +4194,32 @@
       "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
       "dev": true
     },
+    "simple-peer": {
+      "version": "9.11.1",
+      "resolved": "https://registry.npmjs.org/simple-peer/-/simple-peer-9.11.1.tgz",
+      "integrity": "sha512-D1SaWpOW8afq1CZGWB8xTfrT3FekjQmPValrqncJMX7QFl8YwhrPTZvMCANLtgBwwdS+7zURyqxDDEmY558tTw==",
+      "requires": {
+        "buffer": "^6.0.3",
+        "debug": "^4.3.2",
+        "err-code": "^3.0.1",
+        "get-browser-rtc": "^1.1.0",
+        "queue-microtask": "^1.2.3",
+        "randombytes": "^2.1.0",
+        "readable-stream": "^3.6.0"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "3.6.2",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+          "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
+        }
+      }
+    },
     "stackblur-canvas": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/stackblur-canvas/-/stackblur-canvas-2.5.0.tgz",
@@ -4088,6 +4392,13 @@
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
     },
+    "ws": {
+      "version": "7.5.9",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.9.tgz",
+      "integrity": "sha512-F+P9Jil7UiSKSkppIiD94dN07AwvFixvLIj1Og1Rl9GGMuNipJnV9JzjD6XuqmAeiswGvUmNLjr5cFuXwNS77Q==",
+      "optional": true,
+      "requires": {}
+    },
     "xml-js": {
       "version": "1.6.11",
       "resolved": "https://registry.npmjs.org/xml-js/-/xml-js-1.6.11.tgz",
@@ -4096,6 +4407,33 @@
         "sax": "^1.2.4"
       }
     },
+    "y-protocols": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/y-protocols/-/y-protocols-1.0.6.tgz",
+      "integrity": "sha512-vHRF2L6iT3rwj1jub/K5tYcTT/mEYDUppgNPXwp8fmLpui9f7Yeq3OEtTLVF012j39QnV+KEQpNqoN7CWU7Y9Q==",
+      "requires": {
+        "lib0": "^0.2.85"
+      }
+    },
+    "y-webrtc": {
+      "version": "10.2.5",
+      "resolved": "https://registry.npmjs.org/y-webrtc/-/y-webrtc-10.2.5.tgz",
+      "integrity": "sha512-ZyBNvTI5L28sQ2PQI0T/JvyWgvuTq05L21vGkIlcvNLNSJqAaLCBJRe3FHEqXoaogqWmRcEAKGfII4ErNXMnNw==",
+      "requires": {
+        "lib0": "^0.2.42",
+        "simple-peer": "^9.11.0",
+        "ws": "^7.2.0",
+        "y-protocols": "^1.0.5"
+      }
+    },
+    "yjs": {
+      "version": "13.6.8",
+      "resolved": "https://registry.npmjs.org/yjs/-/yjs-13.6.8.tgz",
+      "integrity": "sha512-ZPq0hpJQb6f59B++Ngg4cKexDJTvfOgeiv0sBc4sUm8CaBWH7OQC4kcCgrqbjJ/B2+6vO49exvTmYfdlPtcjbg==",
+      "requires": {
+        "lib0": "^0.2.74"
+      }
+    },
     "yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
diff --git a/simple-mind-map/package.json b/simple-mind-map/package.json
index 506c5f20..2c88fefc 100644
--- a/simple-mind-map/package.json
+++ b/simple-mind-map/package.json
@@ -22,7 +22,8 @@
   "scripts": {
     "lint": "eslint src/",
     "format": "prettier --write .",
-    "types": "npx -p typescript tsc index.js --declaration --allowJs --emitDeclarationOnly --outDir types --target es2017"
+    "types": "npx -p typescript tsc index.js --declaration --allowJs --emitDeclarationOnly --outDir types --target es2017",
+    "serve": "node ./bin/server.mjs"
   },
   "module": "index.js",
   "main": "./dist/simpleMindMap.umd.min.js",
@@ -37,7 +38,9 @@
     "quill": "^1.3.6",
     "tern": "^0.24.3",
     "uuid": "^9.0.0",
-    "xml-js": "^1.6.11"
+    "xml-js": "^1.6.11",
+    "y-webrtc": "^10.2.5",
+    "yjs": "^13.6.8"
   },
   "keywords": [
     "javascript",
diff --git a/simple-mind-map/src/layouts/Base.js b/simple-mind-map/src/layouts/Base.js
index 6199059f..a446acfb 100644
--- a/simple-mind-map/src/layouts/Base.js
+++ b/simple-mind-map/src/layouts/Base.js
@@ -129,6 +129,10 @@ class Base {
         this.renderer.addActiveNode(newNode)
       }
     }
+    // 如果当前节点在激活节点列表里，那么添加上激活的状态
+    if (this.mindMap.renderer.findActiveNodeIndex(newNode) !== -1) {
+      newNode.nodeData.data.isActive = true
+    }
     // 根节点
     if (isRoot) {
       newNode.isRoot = true
diff --git a/simple-mind-map/src/plugins/Cooperate.js b/simple-mind-map/src/plugins/Cooperate.js
new file mode 100644
index 00000000..31fcf65f
--- /dev/null
+++ b/simple-mind-map/src/plugins/Cooperate.js
@@ -0,0 +1,206 @@
+import * as Y from 'yjs'
+import { WebrtcProvider } from 'y-webrtc'
+import { isSameObject, simpleDeepClone } from '../utils/index'
+
+// 协同插件
+class Cooperate {
+  constructor(opt) {
+    this.opt = opt
+    this.mindMap = opt.mindMap
+    this.ydoc = new Y.Doc()
+    this.ymap = this.ydoc.getMap()
+    this.provider = new WebrtcProvider('demo-room', this.ydoc, {
+      signaling: ['ws://10.16.83.11:4444']
+    })
+    this.currentData = null
+
+    // 处理数据
+    if (this.mindMap.opt.data) {
+      this.currentData = this.transformTreeDataToObject(this.mindMap.opt.data)
+      Object.keys(this.currentData).forEach(uid => {
+        this.ymap.set(uid, this.currentData[uid])
+      })
+    }
+
+    this.bindEvent()
+  }
+
+  // 绑定事件
+  bindEvent() {
+    // 监听数据同步
+    this.onObserve = this.onObserve.bind(this)
+    this.ymap.observe(this.onObserve)
+
+    // 监听思维导图改变
+    this.onDataChange = this.onDataChange.bind(this)
+    this.mindMap.on('data_change', this.onDataChange)
+  }
+
+  // 解绑事件
+  unBindEvent() {
+    this.ymap.unobserve(this.onObserve)
+    this.mindMap.off('data_change', this.onDataChange)
+    this.ydoc.destroy()
+  }
+
+  // 数据同步时的处理，更新当前思维导图
+  onObserve(event) {
+    const data = event.target.toJSON()
+    if (isSameObject(data, this.currentData)) return
+    this.currentData = data
+    const res = this.transformObjectToTreeData(data)
+    if (!res) return
+    if (this.mindMap.richText) {
+      this.mindMap.renderer.renderTree =
+        this.mindMap.richText.handleSetData(res)
+    } else {
+      this.mindMap.renderer.renderTree = res
+    }
+    this.mindMap.render()
+    this.mindMap.command.addHistory()
+  }
+
+  // 当前思维导图改变后的处理，触发同步
+  onDataChange(data) {
+    const res = this.transformTreeDataToObject(data)
+    this.updateChanges(res)
+  }
+
+  // 将树结构转平级对象
+  /*
+    {
+        data: {
+            uid: 'xxx'
+        },
+        children: [
+            {
+                data: {
+                    uid: 'xxx'
+                },
+                children: []
+            }
+        ]
+    }
+    转为：
+    {
+        uid: {
+            children: [uid1, uid2],
+            data: {}
+        }
+    }
+  */
+  transformTreeDataToObject(data) {
+    const res = {}
+    const walk = (root, parent) => {
+      const uid = root.data.uid
+      if (parent) {
+        parent.children.push(uid)
+      }
+      res[uid] = {
+        isRoot: !parent,
+        data: {
+          ...root.data
+        },
+        children: []
+      }
+      if (root.children && root.children.length > 0) {
+        root.children.forEach(item => {
+          walk(item, res[uid])
+        })
+      }
+    }
+    walk(data, null)
+    return res
+  }
+
+  // 找到父节点的uid
+  findParentUid(data, targetUid) {
+    const uids = Object.keys(data)
+    let res = ''
+    uids.forEach(uid => {
+      const children = data[uid].children
+      const isParent =
+        children.findIndex(childUid => {
+          return childUid === targetUid
+        }) !== -1
+      if (isParent) {
+        res = uid
+      }
+    })
+    return res
+  }
+
+  // 将平级对象转树结构
+  transformObjectToTreeData(data) {
+    const uids = Object.keys(data)
+    if (uids.length <= 0) return null
+    const rootKey = uids.find(uid => {
+      return data[uid].isRoot
+    })
+    if (!rootKey || !data[rootKey]) return null
+    // 根节点
+    const res = {
+      data: simpleDeepClone(data[rootKey].data),
+      children: []
+    }
+    const map = {}
+    map[rootKey] = res
+    uids.forEach(uid => {
+      const parentUid = this.findParentUid(data, uid)
+      const cur = data[uid]
+      const node = map[uid] || {
+        data: simpleDeepClone(cur.data),
+        children: []
+      }
+      if (!map[uid]) {
+        map[uid] = node
+      }
+      if (parentUid) {
+        if (map[parentUid]) {
+          map[parentUid].children.push(node)
+        } else {
+          map[parentUid] = {
+            data: simpleDeepClone(data[parentUid].data),
+            children: [node]
+          }
+        }
+      }
+    })
+    return res
+  }
+
+  // 找出更新点
+  updateChanges(data) {
+    const oldData = this.currentData
+    this.currentData = data
+    this.ydoc.transact(() => {
+      // 找出新增的或修改的
+      Object.keys(data).forEach(uid => {
+        // 新增的或已经存在的，如果数据发生了改变
+        if (!oldData[uid] || !isSameObject(oldData[uid], data[uid])) {
+          this.ymap.set(uid, data[uid])
+        }
+      })
+      // 找出删除的
+      Object.keys(oldData).forEach(uid => {
+        if (!data[uid]) {
+          this.ymap.delete(uid)
+        }
+      })
+    })
+  }
+
+  // 插件被移除前做的事情
+  beforePluginRemove() {
+    this.unBindEvent()
+  }
+
+  // 插件被卸载前做的事情
+  beforePluginDestroy() {
+    this.unBindEvent()
+  }
+}
+
+Cooperate.instanceName = 'cooperate'
+
+export default Cooperate
diff --git a/web/src/pages/Edit/components/Edit.vue b/web/src/pages/Edit/components/Edit.vue
index da5fb909..e0a1a609 100644
--- a/web/src/pages/Edit/components/Edit.vue
+++ b/web/src/pages/Edit/components/Edit.vue
@@ -45,6 +45,7 @@ import SearchPlugin from 'simple-mind-map/src/plugins/Search.js'
 import Painter from 'simple-mind-map/src/plugins/Painter.js'
 import ScrollbarPlugin from 'simple-mind-map/src/plugins/Scrollbar.js'
 import Formula from 'simple-mind-map/src/plugins/Formula.js'
+import Cooperate from 'simple-mind-map/src/plugins/Cooperate.js'
 import OutlineSidebar from './OutlineSidebar'
 import Style from './Style'
 import BaseStyle from './BaseStyle'
@@ -95,6 +96,7 @@ MindMap.usePlugin(MiniMap)
   .usePlugin(Painter)
   .usePlugin(ScrollbarPlugin)
   .usePlugin(Formula)
+  .usePlugin(Cooperate)
 
 // 注册自定义主题
 customThemeList.forEach(item => {
@@ -476,13 +478,13 @@ export default {
 
     // 测试动态插入节点
     testDynamicCreateNodes() {
-      return
+      // return
       setTimeout(() => {
         // 动态给指定节点添加子节点
         // this.mindMap.execCommand(
         //   'INSERT_CHILD_NODE',
         //   false,
-        //   this.mindMap.renderer.root,
+        //   null,
         //   {
         //     text: '自定义内容'
         //   },