diff --git a/client/build.js b/client/build.js
index b8843e12..eaf28a54 100755
--- a/client/build.js
+++ b/client/build.js
@@ -59,6 +59,9 @@ const util = require('util');
 const execSync = require('child_process').execSync;
 const browserify = require('browserify');
 const chokidar = require('chokidar');
+const WebSocket = require('ws');
+var PrettyError = require('pretty-error');
+var pe = new PrettyError();
 
 function readTextFile(path) {
     return fs.readFileSync(path, 'utf-8');
@@ -157,7 +160,7 @@ function minifyJs(path) {
 
 function writeJsBundle(b, path, compress, callback) {
     let outputFile = fs.createWriteStream(path);
-    b.bundle().on('error', console.error).pipe(outputFile);
+    b.bundle().on('error', (e) => console.error(pe.render(e))).pipe(outputFile);
     outputFile.on('finish', () => {
         if (compress) {
             fs.writeFileSync(path, minifyJs(path));
@@ -211,6 +214,8 @@ function bundleJs() {
     }
 }
 
+const environment = process.argv.includes('--watch') ? "development" : "production";
+
 function bundleConfig() {
     function getVersion() {
         let build_info = process.env.BUILD_INFO;
@@ -228,7 +233,8 @@ function bundleConfig() {
         meta: {
             version: getVersion(),
             buildDate: new Date().toUTCString()
-        }
+        },
+        environment: environment
     };
 
     fs.writeFileSync('./js/.config.autogen.json', JSON.stringify(config));
@@ -309,16 +315,59 @@ function makeOutputDirs() {
 }
 
 function watch() {
-    chokidar.watch('./fonts/**/*').on('change', bundleBinaryAssets);
-    chokidar.watch('./img/**/*').on('change', bundleWebAppFiles);
-    chokidar.watch('./html/**/*.tpl').on('change', bundleHtml);
-    chokidar.watch('./css/**/*.styl').on('change', bundleCss);
+    let wss = new WebSocket.Server({ port: 8080 });
+    const liveReload = !process.argv.includes('--no-live-reload');
+
+    function emitReload() {
+        if (liveReload) {
+            console.log("Requesting live reload.")
+            wss.clients.forEach((client) => {
+                if (client.readyState === WebSocket.OPEN) {
+                    client.send("reload");
+                }
+            });
+        }
+    }
+
+    chokidar.watch('./fonts/**/*').on('change', () => {
+        try {
+            bundleBinaryAssets();
+            emitReload();
+        } catch (e) {
+            console.error(pe.render(e));
+        }
+    });
+    chokidar.watch('./img/**/*').on('change', () => {
+        try {
+            bundleWebAppFiles();
+            emitReload();
+        } catch (e) {
+            console.error(pe.render(e));
+        }
+    });
+    chokidar.watch('./html/**/*.tpl').on('change', () => {
+        try {
+            bundleHtml();
+        } catch (e) {
+            console.error(pe.render(e));
+        }
+    });
+    chokidar.watch('./css/**/*.styl').on('change', () => {
+        try {
+            bundleCss()
+            emitReload();
+        } catch (e) {
+            console.error(pe.render(e));
+        }
+    });
 
     bundleBinaryAssets();
     bundleWebAppFiles();
     bundleCss();
     bundleHtml();
 
+    bundleVendorJs(true);
+
     let watchify = require('watchify');
     let b = browserify({
         debug: process.argv.includes('--debug'),
@@ -341,6 +390,7 @@ function watch() {
         bundleAppJs(b, compress, () => {
             let end = new Date() - start;
             console.info('Rebundled in %ds.', end / 1000)
+            emitReload();
         });
     }
 
@@ -350,6 +400,7 @@ function watch() {
 
 // -------------------------------------------------
 
+console.log("Building for '" + environment + "' environment.");
 makeOutputDirs();
 bundleConfig();
 if (process.argv.includes('--watch')) {
diff --git a/client/html/home_footer.tpl b/client/html/home_footer.tpl
index 8f9cb10a..85e71c96 100644
--- a/client/html/home_footer.tpl
+++ b/client/html/home_footer.tpl
@@ -1,7 +1,7 @@
 <ul>
     <li><%- ctx.postCount %> posts</li><span class='sep'>
     </span><li><%= ctx.makeFileSize(ctx.diskUsage) %></li><span class='sep'>
-    </span><li>Build <a class='version' href='https://github.com/rr-/szurubooru/commits/master'><%- ctx.version %></a> from <%= ctx.makeRelativeTime(ctx.buildDate) %></li><span class='sep'>
+    </span><li>Build <a class='version' href='https://github.com/rr-/szurubooru/commits/master'><%- ctx.version %></a><%- ctx.isDevelopmentMode ? " (DEV MODE)" : "" %> from <%= ctx.makeRelativeTime(ctx.buildDate) %></li><span class='sep'>
     </span><% if (ctx.canListSnapshots) { %><li><a href='<%- ctx.formatClientLink('history') %>'>History</a></li><span class='sep'>
     </span><% } %>
 </ul>
diff --git a/client/js/controllers/home_controller.js b/client/js/controllers/home_controller.js
index cf56e27a..ea2a411c 100644
--- a/client/js/controllers/home_controller.js
+++ b/client/js/controllers/home_controller.js
@@ -17,6 +17,7 @@ class HomeController {
             buildDate: config.meta.buildDate,
             canListSnapshots: api.hasPrivilege("snapshots:list"),
             canListPosts: api.hasPrivilege("posts:list"),
+            isDevelopmentMode: config.environment == "development"
         });
 
         Info.get().then(
diff --git a/client/js/main.js b/client/js/main.js
index b9435744..2be2cd53 100644
--- a/client/js/main.js
+++ b/client/js/main.js
@@ -1,5 +1,20 @@
 "use strict";
 
+const config = require("./config.js");
+
+if (config.environment == "development") {
+    var ws = new WebSocket("ws://" + location.hostname + ":8080");
+    ws.addEventListener('open', function (event) {
+        console.log("Live-reloading websocket connected.");
+    });
+    ws.addEventListener('message', (event) => {
+        console.log(event);
+        if (event.data == 'reload'){
+            location.reload();
+        }
+    });
+}
+
 require("./util/polyfill.js");
 const misc = require("./util/misc.js");
 const views = require("./util/views.js");
diff --git a/client/package-lock.json b/client/package-lock.json
index 2334369e..4c72ec4c 100644
--- a/client/package-lock.json
+++ b/client/package-lock.json
@@ -26,10 +26,12 @@
         "glob": "^7.1.2",
         "html-minifier": "^3.5.18",
         "jimp": "^0.13.0",
+        "pretty-error": "^3.0.3",
         "stylus": "^0.54.5",
         "terser": "^3.7.7",
         "underscore": "^1.9.1",
-        "watchify": "^4.0.0"
+        "watchify": "^4.0.0",
+        "ws": "^7.4.5 "
       }
     },
     "node_modules/@babel/runtime": {
@@ -1252,6 +1254,12 @@
       "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==",
       "dev": true
     },
+    "node_modules/boolbase": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
+      "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24=",
+      "dev": true
+    },
     "node_modules/brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -1751,6 +1759,18 @@
       "integrity": "sha1-Mh9s9zeCpv91ERE5D8BeLGV9jJs=",
       "dev": true
     },
+    "node_modules/css-select": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/css-select/-/css-select-2.1.0.tgz",
+      "integrity": "sha512-Dqk7LQKpwLoH3VovzZnkzegqNSuAziQyNZUcrdDM401iY+R5NkGBXGmtO05/yaXQziALuPogeG0b7UAgjnTJTQ==",
+      "dev": true,
+      "dependencies": {
+        "boolbase": "^1.0.0",
+        "css-what": "^3.2.1",
+        "domutils": "^1.7.0",
+        "nth-check": "^1.0.2"
+      }
+    },
     "node_modules/css-tree": {
       "version": "1.0.0-alpha.29",
       "resolved": "https://registry.npmjs.org/css-tree/-/css-tree-1.0.0-alpha.29.tgz",
@@ -1764,6 +1784,18 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/css-what": {
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/css-what/-/css-what-3.4.2.tgz",
+      "integrity": "sha512-ACUm3L0/jiZTqfzRM3Hi9Q8eZqd6IK37mMWPLz9PJxkLWllYeRf+EHUSHYEtFop2Eqytaq1FizFVh7XfBnXCDQ==",
+      "dev": true,
+      "engines": {
+        "node": ">= 6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/fb55"
+      }
+    },
     "node_modules/csso": {
       "version": "3.5.1",
       "resolved": "https://registry.npmjs.org/csso/-/csso-3.5.1.tgz",
@@ -1881,6 +1913,37 @@
         "randombytes": "^2.0.0"
       }
     },
+    "node_modules/dom-converter": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/dom-converter/-/dom-converter-0.2.0.tgz",
+      "integrity": "sha512-gd3ypIPfOMr9h5jIKq8E3sHOTCjeirnl0WK5ZdS1AW0Odt0b1PaWaHdJ4Qk4klv+YB9aJBS7mESXjFoDQPu6DA==",
+      "dev": true,
+      "dependencies": {
+        "utila": "~0.4"
+      }
+    },
+    "node_modules/dom-serializer": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/dom-serializer/-/dom-serializer-0.2.2.tgz",
+      "integrity": "sha512-2/xPb3ORsQ42nHYiSunXkDjPLBaEj/xTwUO4B7XCZQTRk7EBtTOPaygh10YAAh2OI1Qrp6NWfpAhzswj0ydt9g==",
+      "dev": true,
+      "dependencies": {
+        "domelementtype": "^2.0.1",
+        "entities": "^2.0.0"
+      }
+    },
+    "node_modules/dom-serializer/node_modules/domelementtype": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-2.2.0.tgz",
+      "integrity": "sha512-DtBMo82pv1dFtUmHyr48beiuq792Sxohr+8Hm9zoxklYPfa6n0Z3Byjj2IV7bmr2IyqClnqEQhfgHJJ5QF0R5A==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fb55"
+        }
+      ]
+    },
     "node_modules/dom-walk": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/dom-walk/-/dom-walk-0.1.2.tgz",
@@ -1897,11 +1960,36 @@
         "npm": ">=1.2"
       }
     },
+    "node_modules/domelementtype": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.3.1.tgz",
+      "integrity": "sha512-BSKB+TSpMpFI/HOxCNr1O8aMOTZ8hT3pM3GQ0w/mWRmkhEDSFJkkyzz4XQsBV44BChwGkrDfMyjVD0eA2aFV3w==",
+      "dev": true
+    },
+    "node_modules/domhandler": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-2.4.2.tgz",
+      "integrity": "sha512-JiK04h0Ht5u/80fdLMCEmV4zkNh2BcoMFBmZ/91WtYZ8qVXSKjiw7fXMgFPnHcSZgOo3XdinHvmnDUeMf5R4wA==",
+      "dev": true,
+      "dependencies": {
+        "domelementtype": "1"
+      }
+    },
     "node_modules/dompurify": {
       "version": "2.0.17",
       "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-2.0.17.tgz",
       "integrity": "sha512-nNwwJfW55r8akD8MSFz6k75bzyT2y6JEa1O3JrZFBf+Y5R9JXXU4OsRl0B9hKoPgHTw2b7ER5yJ5Md97MMUJPg=="
     },
+    "node_modules/domutils": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/domutils/-/domutils-1.7.0.tgz",
+      "integrity": "sha512-Lgd2XcJ/NjEw+7tFvfKxOzCYKZsdct5lczQ2ZaQY8Djz7pfAD3Gbp8ySJWtreII/vDlMVmxwa6pHmdxIYgttDg==",
+      "dev": true,
+      "dependencies": {
+        "dom-serializer": "0",
+        "domelementtype": "1"
+      }
+    },
     "node_modules/duplexer2": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/duplexer2/-/duplexer2-0.1.4.tgz",
@@ -1944,6 +2032,15 @@
       "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
       "dev": true
     },
+    "node_modules/entities": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-2.2.0.tgz",
+      "integrity": "sha512-p92if5Nz619I0w+akJrLZH0MX0Pb5DX39XOwQTtXSdQQOaYH03S1uIQp4mhOZtAXrxq4ViO67YTiLBo2638o9A==",
+      "dev": true,
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
+      }
+    },
     "node_modules/es-abstract": {
       "version": "1.18.0",
       "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.18.0.tgz",
@@ -2342,6 +2439,40 @@
         "node": ">=0.10"
       }
     },
+    "node_modules/htmlparser2": {
+      "version": "3.10.1",
+      "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-3.10.1.tgz",
+      "integrity": "sha512-IgieNijUMbkDovyoKObU1DUhm1iwNYE/fuifEoEHfd1oZKZDaONBSkal7Y01shxsM49R4XaMdGez3WnF9UfiCQ==",
+      "dev": true,
+      "dependencies": {
+        "domelementtype": "^1.3.1",
+        "domhandler": "^2.3.0",
+        "domutils": "^1.5.1",
+        "entities": "^1.1.1",
+        "inherits": "^2.0.1",
+        "readable-stream": "^3.1.1"
+      }
+    },
+    "node_modules/htmlparser2/node_modules/entities": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-1.1.2.tgz",
+      "integrity": "sha512-f2LZMYl1Fzu7YSBKg+RoROelpOaNrcGmE9AZubeDfrCEia483oW4MI4VyFd5VNHIgQ/7qm1I0wUHK1eJnn2y2w==",
+      "dev": true
+    },
+    "node_modules/htmlparser2/node_modules/readable-stream": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+      "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+      "dev": true,
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/https-browserify": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/https-browserify/-/https-browserify-1.0.0.tgz",
@@ -2797,9 +2928,9 @@
       }
     },
     "node_modules/lodash": {
-      "version": "4.17.19",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
-      "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==",
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
       "dev": true
     },
     "node_modules/lodash.memoize": {
@@ -3032,6 +3163,15 @@
       "resolved": "https://registry.npmjs.org/nprogress/-/nprogress-0.2.0.tgz",
       "integrity": "sha1-y480xTIT2JVyP8urkH6UIq28r7E="
     },
+    "node_modules/nth-check": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-1.0.2.tgz",
+      "integrity": "sha512-WeBOdju8SnzPN5vTUJYxYUxLeXpCaVP5i5e0LF8fg7WORF2Wd7wFX/pk0tYZk7s8T+J7VLy0Da6J1+wCT0AtHg==",
+      "dev": true,
+      "dependencies": {
+        "boolbase": "~1.0.0"
+      }
+    },
     "node_modules/number-is-nan": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
@@ -3275,6 +3415,16 @@
         "node": ">=4.0.0"
       }
     },
+    "node_modules/pretty-error": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/pretty-error/-/pretty-error-3.0.3.tgz",
+      "integrity": "sha512-nFB0BMeWNJA4YfmrgqPhOH3UQjMQZASZ2ueBfmlyqpVy9+ExLcmwXL/Iu4Wb9pbt/cubQXK4ir8IZUnE8EwFnw==",
+      "dev": true,
+      "dependencies": {
+        "lodash": "^4.17.20",
+        "renderkid": "^2.0.5"
+      }
+    },
     "node_modules/private": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/private/-/private-0.1.8.tgz",
@@ -3467,6 +3617,19 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/renderkid": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/renderkid/-/renderkid-2.0.5.tgz",
+      "integrity": "sha512-ccqoLg+HLOHq1vdfYNm4TBeaCDIi1FLt3wGojTDSvdewUv65oTmI3cnT2E4hRjl1gzKZIPK+KZrXzlUYKnR+vQ==",
+      "dev": true,
+      "dependencies": {
+        "css-select": "^2.0.2",
+        "dom-converter": "^0.2",
+        "htmlparser2": "^3.10.1",
+        "lodash": "^4.17.20",
+        "strip-ansi": "^3.0.0"
+      }
+    },
     "node_modules/repeating": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/repeating/-/repeating-2.0.1.tgz",
@@ -4038,6 +4201,12 @@
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
+    "node_modules/utila": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/utila/-/utila-0.4.0.tgz",
+      "integrity": "sha1-ihagXURWV6Oupe7MWxKk+lN5dyw=",
+      "dev": true
+    },
     "node_modules/vm-browserify": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/vm-browserify/-/vm-browserify-1.1.0.tgz",
@@ -4297,6 +4466,27 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "node_modules/ws": {
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.5.tgz",
+      "integrity": "sha512-xzyu3hFvomRfXKH8vOFMU3OguG6oOvhXMo3xsGy3xWExqaM2dxBbVxuD99O7m3ZUFMvvscsZDqxfgMaRr/Nr1g==",
+      "dev": 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/xhr": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",
@@ -5555,6 +5745,12 @@
       "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==",
       "dev": true
     },
+    "boolbase": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
+      "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24=",
+      "dev": true
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -6017,6 +6213,18 @@
       "integrity": "sha1-Mh9s9zeCpv91ERE5D8BeLGV9jJs=",
       "dev": true
     },
+    "css-select": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/css-select/-/css-select-2.1.0.tgz",
+      "integrity": "sha512-Dqk7LQKpwLoH3VovzZnkzegqNSuAziQyNZUcrdDM401iY+R5NkGBXGmtO05/yaXQziALuPogeG0b7UAgjnTJTQ==",
+      "dev": true,
+      "requires": {
+        "boolbase": "^1.0.0",
+        "css-what": "^3.2.1",
+        "domutils": "^1.7.0",
+        "nth-check": "^1.0.2"
+      }
+    },
     "css-tree": {
       "version": "1.0.0-alpha.29",
       "resolved": "https://registry.npmjs.org/css-tree/-/css-tree-1.0.0-alpha.29.tgz",
@@ -6027,6 +6235,12 @@
         "source-map": "^0.5.3"
       }
     },
+    "css-what": {
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/css-what/-/css-what-3.4.2.tgz",
+      "integrity": "sha512-ACUm3L0/jiZTqfzRM3Hi9Q8eZqd6IK37mMWPLz9PJxkLWllYeRf+EHUSHYEtFop2Eqytaq1FizFVh7XfBnXCDQ==",
+      "dev": true
+    },
     "csso": {
       "version": "3.5.1",
       "resolved": "https://registry.npmjs.org/csso/-/csso-3.5.1.tgz",
@@ -6123,6 +6337,33 @@
         "randombytes": "^2.0.0"
       }
     },
+    "dom-converter": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/dom-converter/-/dom-converter-0.2.0.tgz",
+      "integrity": "sha512-gd3ypIPfOMr9h5jIKq8E3sHOTCjeirnl0WK5ZdS1AW0Odt0b1PaWaHdJ4Qk4klv+YB9aJBS7mESXjFoDQPu6DA==",
+      "dev": true,
+      "requires": {
+        "utila": "~0.4"
+      }
+    },
+    "dom-serializer": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/dom-serializer/-/dom-serializer-0.2.2.tgz",
+      "integrity": "sha512-2/xPb3ORsQ42nHYiSunXkDjPLBaEj/xTwUO4B7XCZQTRk7EBtTOPaygh10YAAh2OI1Qrp6NWfpAhzswj0ydt9g==",
+      "dev": true,
+      "requires": {
+        "domelementtype": "^2.0.1",
+        "entities": "^2.0.0"
+      },
+      "dependencies": {
+        "domelementtype": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-2.2.0.tgz",
+          "integrity": "sha512-DtBMo82pv1dFtUmHyr48beiuq792Sxohr+8Hm9zoxklYPfa6n0Z3Byjj2IV7bmr2IyqClnqEQhfgHJJ5QF0R5A==",
+          "dev": true
+        }
+      }
+    },
     "dom-walk": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/dom-walk/-/dom-walk-0.1.2.tgz",
@@ -6135,11 +6376,36 @@
       "integrity": "sha512-jnjyiM6eRyZl2H+W8Q/zLMA481hzi0eszAaBUzIVnmYVDBbnLxVNnfu1HgEBvCbL+71FrxMl3E6lpKH7Ge3OXA==",
       "dev": true
     },
+    "domelementtype": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.3.1.tgz",
+      "integrity": "sha512-BSKB+TSpMpFI/HOxCNr1O8aMOTZ8hT3pM3GQ0w/mWRmkhEDSFJkkyzz4XQsBV44BChwGkrDfMyjVD0eA2aFV3w==",
+      "dev": true
+    },
+    "domhandler": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-2.4.2.tgz",
+      "integrity": "sha512-JiK04h0Ht5u/80fdLMCEmV4zkNh2BcoMFBmZ/91WtYZ8qVXSKjiw7fXMgFPnHcSZgOo3XdinHvmnDUeMf5R4wA==",
+      "dev": true,
+      "requires": {
+        "domelementtype": "1"
+      }
+    },
     "dompurify": {
       "version": "2.0.17",
       "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-2.0.17.tgz",
       "integrity": "sha512-nNwwJfW55r8akD8MSFz6k75bzyT2y6JEa1O3JrZFBf+Y5R9JXXU4OsRl0B9hKoPgHTw2b7ER5yJ5Md97MMUJPg=="
     },
+    "domutils": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/domutils/-/domutils-1.7.0.tgz",
+      "integrity": "sha512-Lgd2XcJ/NjEw+7tFvfKxOzCYKZsdct5lczQ2ZaQY8Djz7pfAD3Gbp8ySJWtreII/vDlMVmxwa6pHmdxIYgttDg==",
+      "dev": true,
+      "requires": {
+        "dom-serializer": "0",
+        "domelementtype": "1"
+      }
+    },
     "duplexer2": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/duplexer2/-/duplexer2-0.1.4.tgz",
@@ -6184,6 +6450,12 @@
         }
       }
     },
+    "entities": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-2.2.0.tgz",
+      "integrity": "sha512-p92if5Nz619I0w+akJrLZH0MX0Pb5DX39XOwQTtXSdQQOaYH03S1uIQp4mhOZtAXrxq4ViO67YTiLBo2638o9A==",
+      "dev": true
+    },
     "es-abstract": {
       "version": "1.18.0",
       "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.18.0.tgz",
@@ -6496,6 +6768,39 @@
       "integrity": "sha1-OgPtwiFLyjtmQko+eVk0lQnLA1E=",
       "dev": true
     },
+    "htmlparser2": {
+      "version": "3.10.1",
+      "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-3.10.1.tgz",
+      "integrity": "sha512-IgieNijUMbkDovyoKObU1DUhm1iwNYE/fuifEoEHfd1oZKZDaONBSkal7Y01shxsM49R4XaMdGez3WnF9UfiCQ==",
+      "dev": true,
+      "requires": {
+        "domelementtype": "^1.3.1",
+        "domhandler": "^2.3.0",
+        "domutils": "^1.5.1",
+        "entities": "^1.1.1",
+        "inherits": "^2.0.1",
+        "readable-stream": "^3.1.1"
+      },
+      "dependencies": {
+        "entities": {
+          "version": "1.1.2",
+          "resolved": "https://registry.npmjs.org/entities/-/entities-1.1.2.tgz",
+          "integrity": "sha512-f2LZMYl1Fzu7YSBKg+RoROelpOaNrcGmE9AZubeDfrCEia483oW4MI4VyFd5VNHIgQ/7qm1I0wUHK1eJnn2y2w==",
+          "dev": true
+        },
+        "readable-stream": {
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+          "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
+        }
+      }
+    },
     "https-browserify": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/https-browserify/-/https-browserify-1.0.0.tgz",
@@ -6844,9 +7149,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.19",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
-      "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==",
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
       "dev": true
     },
     "lodash.memoize": {
@@ -7039,6 +7344,15 @@
       "resolved": "https://registry.npmjs.org/nprogress/-/nprogress-0.2.0.tgz",
       "integrity": "sha1-y480xTIT2JVyP8urkH6UIq28r7E="
     },
+    "nth-check": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-1.0.2.tgz",
+      "integrity": "sha512-WeBOdju8SnzPN5vTUJYxYUxLeXpCaVP5i5e0LF8fg7WORF2Wd7wFX/pk0tYZk7s8T+J7VLy0Da6J1+wCT0AtHg==",
+      "dev": true,
+      "requires": {
+        "boolbase": "~1.0.0"
+      }
+    },
     "number-is-nan": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
@@ -7240,6 +7554,16 @@
       "integrity": "sha512-NCrCHhWmnQklfH4MtJMRjZ2a8c80qXeMlQMv2uVp9ISJMTt562SbGd6n2oq0PaPgKm7Z6pL9E2UlLIhC+SHL3w==",
       "dev": true
     },
+    "pretty-error": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/pretty-error/-/pretty-error-3.0.3.tgz",
+      "integrity": "sha512-nFB0BMeWNJA4YfmrgqPhOH3UQjMQZASZ2ueBfmlyqpVy9+ExLcmwXL/Iu4Wb9pbt/cubQXK4ir8IZUnE8EwFnw==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.20",
+        "renderkid": "^2.0.5"
+      }
+    },
     "private": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/private/-/private-0.1.8.tgz",
@@ -7407,6 +7731,19 @@
       "integrity": "sha1-VNvzd+UUQKypCkzSdGANP/LYiKk=",
       "dev": true
     },
+    "renderkid": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/renderkid/-/renderkid-2.0.5.tgz",
+      "integrity": "sha512-ccqoLg+HLOHq1vdfYNm4TBeaCDIi1FLt3wGojTDSvdewUv65oTmI3cnT2E4hRjl1gzKZIPK+KZrXzlUYKnR+vQ==",
+      "dev": true,
+      "requires": {
+        "css-select": "^2.0.2",
+        "dom-converter": "^0.2",
+        "htmlparser2": "^3.10.1",
+        "lodash": "^4.17.20",
+        "strip-ansi": "^3.0.0"
+      }
+    },
     "repeating": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/repeating/-/repeating-2.0.1.tgz",
@@ -7901,6 +8238,12 @@
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
+    "utila": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/utila/-/utila-0.4.0.tgz",
+      "integrity": "sha1-ihagXURWV6Oupe7MWxKk+lN5dyw=",
+      "dev": true
+    },
     "vm-browserify": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/vm-browserify/-/vm-browserify-1.1.0.tgz",
@@ -8137,6 +8480,13 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "ws": {
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.5.tgz",
+      "integrity": "sha512-xzyu3hFvomRfXKH8vOFMU3OguG6oOvhXMo3xsGy3xWExqaM2dxBbVxuD99O7m3ZUFMvvscsZDqxfgMaRr/Nr1g==",
+      "dev": true,
+      "requires": {}
+    },
     "xhr": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",
diff --git a/client/package.json b/client/package.json
index 0209c76f..1df649ad 100644
--- a/client/package.json
+++ b/client/package.json
@@ -3,8 +3,7 @@
   "private": true,
   "scripts": {
     "build": "node build.js",
-    "watch": "bash watch.sh",
-    "watchify": "watchify ./js/**/*.js -o ./public/js/app.min.js -d -v"
+    "watch": "node build.js --watch"
   },
   "dependencies": {
     "dompurify": "^2.0.17",
@@ -27,9 +26,11 @@
     "glob": "^7.1.2",
     "html-minifier": "^3.5.18",
     "jimp": "^0.13.0",
+    "pretty-error": "^3.0.3",
     "stylus": "^0.54.5",
     "terser": "^3.7.7",
     "underscore": "^1.9.1",
-    "watchify": "^4.0.0"
+    "watchify": "^4.0.0",
+    "ws": "^7.4.5"
   }
 }
diff --git a/client/watch.sh b/client/watch.sh
deleted file mode 100644
index 09e422ba..00000000
--- a/client/watch.sh
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-npm run watchify &
-
-c1="";
-while :; do
-    c2=$(find html css img -type f -and -not -iname '*autogen*'|sort|xargs cat|md5sum);
-    [[ $c1 != $c2 ]] && npm run build -- --debug --no-js --no-binary-assets --no-web-app-files
-    c1=$c2;
-    sleep 1;
-done
-
-wait