diff --git a/package-lock.json b/package-lock.json
index 80d87e6e..8aa8ba4c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,8 @@
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@@ -656,6 +657,145 @@
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@@ -1256,6 +1375,18 @@
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+      "dev": true,
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@@ -1913,18 +2056,43 @@
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@@ -2255,6 +2423,42 @@
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@@ -2565,6 +2778,21 @@
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@@ -2753,6 +2981,12 @@
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+      "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.1.1.tgz",
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+    "find-up": {
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+      "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
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+      "dev": true,
+      "requires": {
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+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
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+    },
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@@ -5052,18 +5409,40 @@
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       "dev": true
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+    "locate-path": {
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+      "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
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+      "dev": true,
+      "requires": {
+        "p-locate": "^3.0.0",
+        "path-exists": "^3.0.0"
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     "lodash": {
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+    "lodash.debounce": {
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/lodash.debounce/-/lodash.debounce-4.0.8.tgz",
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+      "dev": true
+    },
     "lodash.memoize": {
       "version": "3.0.4",
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       "integrity": "sha1-LcvSwofLwKVcxCMovQxzYVDVPj8=",
       "dev": true
     },
+    "lodash.throttle": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/lodash.throttle/-/lodash.throttle-4.1.1.tgz",
+      "integrity": "sha512-wIkUCfVKpVsWo3JSZlc+8MB5it+2AN5W8J7YVMST30UrvcQNZ1Okbj+rbVniijTWE6FGYy4XJq/rHkas8qJMLQ==",
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@@ -5335,6 +5714,30 @@
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+    "p-limit": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
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+      "dev": true,
+      "requires": {
+        "p-try": "^2.0.0"
+      }
+    },
+    "p-locate": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+      "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+      "dev": true,
+      "requires": {
+        "p-limit": "^2.0.0"
+      }
+    },
+    "p-try": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+      "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
+      "dev": true
+    },
     "pako": {
       "version": "1.0.11",
       "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
@@ -5378,6 +5781,12 @@
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       "dev": true
     },
+    "path-exists": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
+      "integrity": "sha512-bpC7GYwiDYQ4wYLe+FA8lhRjhQCMcQGuSgGGqDkg/QerRWw9CmGRT0iSOVRSZJ29NMLZgIzqaljJ63oaL4NIJQ==",
+      "dev": true
+    },
     "path-is-absolute": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
@@ -5428,9 +5837,9 @@
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-      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.0.tgz",
-      "integrity": "sha512-lY1Q/PiJGC2zOv/z391WOTD+Z02bCgsFfvxoXXf6h7kv9o+WmsmzYqrAwY63sNgOxE4xEdq0WyUnXfKeBrSvYw==",
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
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@@ -5603,6 +6012,18 @@
       "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
       "dev": true
     },
+    "require-directory": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
+      "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==",
+      "dev": true
+    },
+    "require-main-filename": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
+      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.20.0.tgz",
@@ -5751,6 +6172,12 @@
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       }
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+    "set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
@@ -6299,6 +6726,12 @@
         "is-symbol": "^1.0.3"
       }
     },
+    "which-module": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.1.tgz",
+      "integrity": "sha512-iBdZ57RDvnOR9AGBhML2vFZf7h8vmBjhoaZqODJBFWHVtKkDmKuHai3cx5PgVMrX5YDNp27AofYbAwctSS+vhQ==",
+      "dev": true
+    },
     "which-typed-array": {
       "version": "1.1.6",
       "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.6.tgz",
diff --git a/package.json b/package.json
index c127686c..d6a7869c 100644
--- a/package.json
+++ b/package.json
@@ -6,21 +6,22 @@
   "scripts": {
     "clean": "rimraf dist",
     "start": "npm run serve-watch",
-    "prep": "copyfiles analytics.js dist && concat node_modules/material-design-lite/material.min.js node_modules/seedrandom/seedrandom.min.js > dist/lib.js",
-    "build-css": "concat node_modules/material-design-lite/material.min.css styles.css > dist/bundle.css",
-    "watch-css": "concat node_modules/material-design-lite/material.min.css styles.css -o dist/bundle.css",
+    "prep": "copyfiles analytics.js dist && cat node_modules/material-design-lite/material.min.js node_modules/seedrandom/seedrandom.min.js > dist/lib.js",
+    "build-css": "cat node_modules/material-design-lite/material.min.css styles.css > dist/bundle.css",
+    "watch-css": "npm run build-css && chokidar 'node_modules/material-design-lite/material.min.css' 'styles.css' -c 'npm run build-css'",
     "build-html": "copyfiles index.html dist",
-    "watch-html": "concat index.html -o dist/index.html",
-    "build-js": "browserify src/playground.ts -p [tsify] | uglifyjs -c > dist/bundle.js",
+    "watch-html": "chokidar 'index.html' -c 'npm run build-html'",
+    "build-js": "browserify src/playground.ts -p [tsify] > dist/bundle.js",
     "watch-js": "watchify src/playground.ts -p [tsify] -v --debug -o dist/bundle.js",
     "build": "npm run prep && npm run build-js && npm run build-css && npm run build-html",
     "watch": "npm run prep && concurrently \"npm run watch-js\" \"npm run watch-css\" \"npm run watch-html\"",
-    "serve": "npx serve dist/",
-    "serve-watch": "concurrently \"npx serve dist/\" \"npm run watch\""
+    "serve": "serve dist",
+    "serve-watch": "concurrently \"npm run serve\" \"npm run watch\""
   },
   "devDependencies": {
     "@types/d3": "^3.5.34",
-    "concat": "^1.0.3",
+    "browserify": "^17.0.0",
+    "chokidar-cli": "^3.0.0",
     "concurrently": "3.1.0",
     "copyfiles": "1.0.0",
     "rimraf": "2.5.4",