Use esbuild instead of Parcel. (#131)

This replaces Parcel with [esbuild][].

esbuild has a number of advantages over Parcel:

* It is much, much, *much* faster. A Parcel build takes several seconds on my system, while esbuild takes 60-70 _milliseconds_.
* Parcel hard-crashes when I switch branches on Windows, esbuild doesn't.

The one disadvantage is that, as far as I can tell, esbuild doesn't support any kind of auto-reloading in the browser when you change things. IMO this isn't that big a deal and the benefits outweigh this minor inconvenience (and anyways, auto-reload has historically backfired so many times that I usually have been manually reloading the page whenever I make changes).

[esbuild]: https://esbuild.github.io/

.gitignore

@@ -1,7 +1,7 @@
 node_modules
-dist
-dist-watch
 .cache
 lib/_svg-vocabulary-pretty-printed.json
 lib/_svg-vocabulary.ts
 lib/**/*.avsc.ts
+dist/browser-main.js
+dist/browser-main.js.map

dist/index.html

@@ -174,4 +174,4 @@ ul.navbar li:last-child {
   <p>Alas, you need JavaScript to peruse this page.</p>
 </noscript>
 <div id="app" className="app"></div>
-<script src="lib/browser-main.tsx"></script>
+<script src="browser-main.js"></script>

lib/esbuild-shims.js

@@ -0,0 +1,5 @@
+import * as buf from "buffer/";
+
+export let process = { env: {} };
+
+export let Buffer = buf.Buffer;

package.json

@@ -10,16 +10,18 @@
     "typecheck": "tsc --noemit",
     "test:watch": "jest --watch",
     "test": "jest",
+    "esbuild": "esbuild lib/browser-main.tsx --bundle --outfile=dist/browser-main.js --external:stylus --define:global=window --inject:./lib/esbuild-shims.js --target=es2018 --sourcemap",
+    "esbuild:build": "npm run esbuild -- --define:process.env.NODE_ENV=\\\"production\\\" --minify",
+    "esbuild:serve": "npm run esbuild -- --servedir=dist --serve=1234",
     "build-prereqs": "node build-vocabulary.js && node build-avro-typescript.js",
-    "build": "npm run build-prereqs && rimraf dist && parcel build index.html -d dist --public-url .",
+    "build": "npm run build-prereqs && npm run esbuild:build",
-    "watch": "npm run build-prereqs && parcel index.html -d dist-watch"
+    "watch": "npm run build-prereqs && npm run esbuild:serve"
   },
   "author": "",
   "license": "ISC",
   "jest": {
     "testPathIgnorePatterns": [
       "dist",
-      "dist-watch",
       ".cache"
     ]
   },
@@ -37,24 +39,20 @@
     "avro-js": "^1.10.2",
     "avro-typescript": "^1.1.0",
     "babel-jest": "^26.6.3",
+    "buffer": "^6.0.3",
     "cheerio": "^1.0.0-rc.5",
     "classnames": "^2.3.1",
     "colorspaces": "^0.1.5",
+    "esbuild": "^0.12.5",
     "gh-pages": "^3.1.0",
     "hsluv": "^0.1.0",
     "jest": "^26.6.3",
-    "parcel-bundler": "^1.12.4",
-    "parcel-plugin-static-files-copy": "^2.6.0",
     "prettier": "^2.2.1",
     "react": "^17.0.1",
     "react-dom": "^17.0.1",
     "toml": "^3.0.0",
-    "typescript": "^4.1.3"
+    "typescript": "^4.1.3",
+    "util": "^0.12.3"
   },
-  "browserslist": [
+  "devDependencies": {}
-    "since 2017-06"
-  ],
-  "devDependencies": {
-    "rimraf": "^3.0.2"
-  }
 }

tsconfig.json

@@ -1,7 +1,6 @@
 {
   "exclude": [
     "dist",
-    "dist-watch",
     "vendor/**/*.js",
   ],
   "compilerOptions": {