Test CodeSandbox.

.codesandbox/ci.json

@@ -1,5 +1,5 @@
 {
+  "buildCommand": false,
   "sandboxes": ["2d17z"],
-  "packages": ["."],
   "node": "16"
 }

build/build.js

@@ -5,6 +5,7 @@ const nodeResolve = require('rollup-plugin-node-resolve')
 const { uglify } = require('rollup-plugin-uglify')
 const replace = require('rollup-plugin-replace')
 const isProd = process.env.NODE_ENV === 'production'
+const isWatch = process.env.NODE_ENV === 'watch'
 const version = process.env.VERSION || require('../package.json').version
 const chokidar = require('chokidar')
 const path = require('path')
@@ -110,7 +111,7 @@ async function buildAllPlugin() {
 }
 
 async function main() {
-  if (!isProd) {
+  if (isWatch) {
     chokidar
       .watch(['src/core', 'src/plugins'], {
         atomic: true,

package.json

@@ -50,7 +50,7 @@
     "test:unit": "jest --selectProjects unit",
     "test": "jest && run-s test:e2e",
     "watch:css": "npm run css -- -o themes -w",
-    "watch:js": "node build/build.js"
+    "watch:js": "cross-env NODE_ENV=watch node build/build.js"
   },
   "husky": {
     "hooks": {