Note: package.json must be actual JSON, not just JavaScript.

npm run dev

"scripts": {
"dev": "webpack-dev-server --progress --config build/webpack.dev.conf.js",
"start": "npm run dev",
"build": "node build/build.js"
// "open" : "webpack-dev-server"
},

npm ERR! code EJSONPARSE
npm ERR! path K:\Source_code\liaotian\app_1217/package.json
npm ERR! JSON.parse Unexpected token "/" (0x2F) in JSON at position 242 while parsing near "...e build/build.js"\r\n\t// "open" : "webpack..."
npm ERR! JSON.parse Failed to parse JSON data.
npm ERR! JSON.parse Note: package.json must be actual JSON, not just JavaScript.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Administrator\AppData\Local\npm-cache_logs\2022-03-29T09_28_42_652Z-debug.log

各位，这个是啥问题呢？

你看下package.json是不是多了,或者少了,