create-react-app build配置

package.json 配置

{
  "script": {
    "build": "cross-env GENERATE_SOURCEMAP=false node scripts/build.js"
  }
}

去除 sourceMap

GENERATE_SOURCEMAP=false 生产环境去除sourcemap
配置 nodejs 运行时候的环境变量，传入 GENERATE_SOURCEMAP 值为 false

webpackconfig.js

process.env.GENERATE_SOURCEMAP = 'false'