re-enable watch mode

config/esbuild.config.modern.mjs

@@ -1,8 +1,12 @@
 import esbuild from 'esbuild';
 import fs from 'node:fs';
+import parse from 'minimist';
+
+let args = parse(process.argv.slice(2), {boolean: true});
+delete args._;
 
 esbuild
-  .build({
+  .build(Object.assign({
     bundle: true,
     sourcemap: true,
     entryPoints: ['./modules/id.js'],
@@ -10,7 +14,7 @@ esbuild
     logLevel: 'info',
     metafile: true,
     outfile: 'dist/iD.js'
-  })
+  }, args))
   .then(result => {
     fs.writeFileSync('./dist/esbuild.json', JSON.stringify(result.metafile, null, 2));
   })

package.json

@@ -18,6 +18,7 @@
     "build:data": "shx mkdir -p dist/data && node scripts/build_data.js",
     "build:stats": "esbuild-visualizer --metadata dist/esbuild.json --exclude *.png --filename docs/statistics.html",
     "build:modern": "node config/esbuild.config.modern.mjs",
+    "build:modern:watch": "node config/esbuild.config.modern.mjs --watch",
     "build:legacy": "node config/esbuild.config.legacy.mjs",
     "clean": "shx rm -f dist/esbuild.json dist/*.js dist/*.map dist/*.css dist/img/*.svg",
     "dist": "run-p dist:**",
@@ -36,6 +37,7 @@
     "lint": "eslint scripts test/spec modules",
     "lint:fix": "eslint scripts test/spec modules --fix",
     "start": "run-s build:modern start:server",
+    "start:watch": "run-p build:modern:watch start:server",
     "start:server": "node scripts/server.js",
     "test": "npm-run-all -s lint build test:spec",
     "test:spec": "karma start karma.conf.js",