diff --git a/Makefile b/Makefile
index a91b92e8..0948d25a 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@ SHINYLIVE_VERSION = $(shell node -p "require('./package.json').version")
 PYODIDE_VERSION = 0.26.0
 PYODIDE_DIST_FILENAME = pyodide-$(PYODIDE_VERSION).tar.bz2
 DOWNLOAD_DIR = ./downloads
-R_SHINY_VERSION = 1.8.1.9901
+R_SHINY_VERSION = 1.8.1.8001-webr
 BUILD_DIR = ./build
 PACKAGE_DIR = ./packages
 DIST_DIR = ./dist
diff --git a/package-lock.json b/package-lock.json
index cb340cd0..138f9f7e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -65,7 +65,7 @@
         "tsx": "^4.7.0",
         "typescript": "^5.3.3",
         "vscode-languageserver-protocol": "^3.17.5",
-        "webr": "^0.3.1",
+        "webr": "^0.4.0",
         "xterm": "^5.3.0",
         "xterm-addon-fit": "^0.7.0",
         "xterm-readline": "^1.1.1"
@@ -3474,6 +3474,15 @@
         "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
       }
     },
+    "node_modules/clsx": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/clsx/-/clsx-2.1.1.tgz",
+      "integrity": "sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
@@ -3557,6 +3566,12 @@
       "integrity": "sha512-ASFBup0Mz1uyiIjANan1jzLQami9z1PoYSZCiiYW2FczPbenXc45FZdBZLzOT+r6+iciuEModtmCti+hjaAk0A==",
       "dev": true
     },
+    "node_modules/core-util-is": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
+      "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ==",
+      "dev": true
+    },
     "node_modules/crelt": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/crelt/-/crelt-1.0.6.tgz",
@@ -5172,6 +5187,12 @@
         "node": ">= 4"
       }
     },
+    "node_modules/immediate": {
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/immediate/-/immediate-3.0.6.tgz",
+      "integrity": "sha512-XXOFtyqDjNDAQxVfYxuF7g9Il/IbWmmlQg2MYKOH8ExIT1qg6xc4zyS3HaEEATgs1btfzxq15ciUiY7gjSXRGQ==",
+      "dev": true
+    },
     "node_modules/import-fresh": {
       "version": "3.3.0",
       "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.3.0.tgz",
@@ -7309,6 +7330,18 @@
         "node": ">=4.0"
       }
     },
+    "node_modules/jszip": {
+      "version": "3.10.1",
+      "resolved": "https://registry.npmjs.org/jszip/-/jszip-3.10.1.tgz",
+      "integrity": "sha512-xXDvecyTpGLrqFrvkrUSoxxfJI5AH7U8zxxtVclpsUtMCq4JQ290LY8AW5c7Ggnr/Y/oK+bQMbqK2qmtk3pN4g==",
+      "dev": true,
+      "dependencies": {
+        "lie": "~3.3.0",
+        "pako": "~1.0.2",
+        "readable-stream": "~2.3.6",
+        "setimmediate": "^1.0.5"
+      }
+    },
     "node_modules/keyv": {
       "version": "4.5.4",
       "resolved": "https://registry.npmjs.org/keyv/-/keyv-4.5.4.tgz",
@@ -7350,15 +7383,24 @@
       }
     },
     "node_modules/lezer-r": {
-      "version": "0.1.0-5",
-      "resolved": "https://registry.npmjs.org/lezer-r/-/lezer-r-0.1.0-5.tgz",
-      "integrity": "sha512-4I2JAhoHyy9sfJq8n7+4jRDEGjO3Wo+qCGUzfTrxEDEI3dpnEqigmxnjMa7MrejpirvenrO0MmsY2gtbxkQeLg==",
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/lezer-r/-/lezer-r-0.1.1.tgz",
+      "integrity": "sha512-bIBHtedC6VtdYpsj7q6OO/CiU7rQkNOUJPi3EmqlpxW/Vv/R8jJI6Lr8jRqsSqZZD5GslLsYdrx3mXvvDv3xAg==",
       "dev": true,
       "dependencies": {
         "@lezer/highlight": "^1.0.0",
         "@lezer/lr": "^1.0.0"
       }
     },
+    "node_modules/lie": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/lie/-/lie-3.3.0.tgz",
+      "integrity": "sha512-UaiMJzeWRlEujzAuw5LokY1L5ecNQYZKfmyZ9L7wDHb/p5etKaxXhohBcrw0EYby+G/NA52vRSN4N39dxHAIwQ==",
+      "dev": true,
+      "dependencies": {
+        "immediate": "~3.0.5"
+      }
+    },
     "node_modules/lightningcss": {
       "version": "1.22.1",
       "resolved": "https://registry.npmjs.org/lightningcss/-/lightningcss-1.22.1.tgz",
@@ -8021,6 +8063,12 @@
         "node": ">=6"
       }
     },
+    "node_modules/pako": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
+      "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw==",
+      "dev": true
+    },
     "node_modules/parent-module": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.1.tgz",
@@ -8341,6 +8389,12 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
+    "node_modules/process-nextick-args": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==",
+      "dev": true
+    },
     "node_modules/prompts": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/prompts/-/prompts-2.4.2.tgz",
@@ -8436,6 +8490,19 @@
         "react-dom": "^16.8.0 || ^17.0.0 || ^18.0.0"
       }
     },
+    "node_modules/react-data-grid": {
+      "version": "7.0.0-beta.44",
+      "resolved": "https://registry.npmjs.org/react-data-grid/-/react-data-grid-7.0.0-beta.44.tgz",
+      "integrity": "sha512-VTql8VPBJEf7E+zkrqYW+jaQT1/m47dxigWzPq59QESJ8LhU59kHyzIx06BUpjdZKdK/tzbWaw2yyJpKoNnt5g==",
+      "dev": true,
+      "dependencies": {
+        "clsx": "^2.0.0"
+      },
+      "peerDependencies": {
+        "react": "^18.0",
+        "react-dom": "^18.0"
+      }
+    },
     "node_modules/react-dom": {
       "version": "18.2.0",
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-18.2.0.tgz",
@@ -8480,6 +8547,37 @@
       "integrity": "sha512-w2GsyukL62IJnlaff/nRegPQR94C/XXamvMWmSHRJ4y7Ts/4ocGRmTHvOs8PSE6pB3dWOrD/nueuU5sduBsQ4w==",
       "dev": true
     },
+    "node_modules/react-resizable-panels": {
+      "version": "2.0.19",
+      "resolved": "https://registry.npmjs.org/react-resizable-panels/-/react-resizable-panels-2.0.19.tgz",
+      "integrity": "sha512-v3E41kfKSuCPIvJVb4nL4mIZjjKIn/gh6YqZF/gDfQDolv/8XnhJBek4EiV2gOr3hhc5A3kOGOayk3DhanpaQw==",
+      "dev": true,
+      "peerDependencies": {
+        "react": "^16.14.0 || ^17.0.0 || ^18.0.0",
+        "react-dom": "^16.14.0 || ^17.0.0 || ^18.0.0"
+      }
+    },
+    "node_modules/readable-stream": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.8.tgz",
+      "integrity": "sha512-8p0AUk4XODgIewSi0l8Epjs+EVnWiK7NoDIEGU0HhE7+ZyY8D1IMY7odu5lRrFXGg71L15KG8QrPmum45RTtdA==",
+      "dev": true,
+      "dependencies": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      }
+    },
+    "node_modules/readable-stream/node_modules/isarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+      "integrity": "sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ==",
+      "dev": true
+    },
     "node_modules/reflect.getprototypeof": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/reflect.getprototypeof/-/reflect.getprototypeof-1.0.4.tgz",
@@ -8704,6 +8802,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true
+    },
     "node_modules/safe-regex-test": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/safe-regex-test/-/safe-regex-test-1.0.0.tgz",
@@ -8807,6 +8911,12 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/setimmediate": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.5.tgz",
+      "integrity": "sha512-MATJdZp8sLqDl/68LfQmbP8zKPLQNV6BIZoIgrscFDQ+RsvK/BxeDQOgyxKKoh0y/8h3BqVFnCqQ/gd+reiIXA==",
+      "dev": true
+    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -8927,6 +9037,15 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "node_modules/string-length": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/string-length/-/string-length-4.0.2.tgz",
@@ -9965,6 +10084,12 @@
         "requires-port": "^1.0.0"
       }
     },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
+      "dev": true
+    },
     "node_modules/v8-to-istanbul": {
       "version": "8.1.1",
       "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-8.1.1.tgz",
@@ -10060,9 +10185,9 @@
       }
     },
     "node_modules/webr": {
-      "version": "0.3.1",
-      "resolved": "https://registry.npmjs.org/webr/-/webr-0.3.1.tgz",
-      "integrity": "sha512-uUxoHyR7dSFKorbaZPt9xq8q+gQCt1NsYbofzkPxUrmnEYn4wOOgApk7HeIAwW4mIzxlOeHsr9Uaw6An/CHC3g==",
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/webr/-/webr-0.4.0.tgz",
+      "integrity": "sha512-vDggYyMJHEv/X7mViz9kalFd56+D4fVwWREAVF+EqKVkyETNI/tFCOLdp+R16C1rhnMA/QMZvyXrcK/tb79WUA==",
       "dev": true,
       "dependencies": {
         "@codemirror/autocomplete": "^6.8.1",
@@ -10073,12 +10198,16 @@
         "classnames": "^2.2.6",
         "codemirror": "^6.0.1",
         "codemirror-lang-r": "^0.1.0-2",
+        "jszip": "^3.10.1",
+        "lezer-r": "^0.1.1",
         "lightningcss": "^1.21.5",
         "prop-types": "^15.7.2",
         "react": "^18.2.0",
         "react-accessible-treeview": "^2.6.1",
+        "react-data-grid": "^7.0.0-beta.44",
         "react-dom": "^18.2.0",
         "react-icons": "^4.10.1",
+        "react-resizable-panels": "^2.0.19",
         "tsx": "^4.0.0",
         "xmlhttprequest-ssl": "^2.1.0",
         "xterm": "^5.1.0",
diff --git a/package.json b/package.json
index 68f0fbe4..d98b826f 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "tsx": "^4.7.0",
     "typescript": "^5.3.3",
     "vscode-languageserver-protocol": "^3.17.5",
-    "webr": "^0.3.1",
+    "webr": "^0.4.0",
     "xterm": "^5.3.0",
     "xterm-addon-fit": "^0.7.0",
     "xterm-readline": "^1.1.1"