npm install 之后，packages.json 就自动添加了比如 "mockjs": "^1.1.0", "dependencies": { "axios": "^0.18.0", "cjs": "0.0.11", "echarts": "^4.0.4", "element-ui": "^2.3.6", "forever-monitor": "^1.7.1", "layui": "0.0.1", "layui-src": "^2.2.5", "mockjs": "^1.1.0", "qs": "^6.5.2", "react": "^16.3.2", "vue": "^2.5.2", "vue-resource": "^1.5.1", "vue-router": "^3.0.1" },