“loose”: true is not fixing Support for the experimental syntax 'classProperties' isn't currently enabled
问题 Support for the experimental syntax 'classProperties' isn't currently enabled I tried the solutions still get the error after re building. Support for the experimental syntax 'classProperties' isn't currently enabled package.json { "name": "blahmodule", "version": "1.0.0", "description": "a fetch module for our project", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "build": "./node_modules/.bin/babel src --out-file index.js" }, "peerDependencies": {