我的React应用程序使用的是来自.env文件的值，而不是.env.local文件

Question

dotenv模块应该是将我的.env.local文件优先于.env文件，但它不是。当我在两个文件中设置REACT_APP_API_BASE时，应用程序总是使用.env中的值。只有当我删除.env.local中的匹配定义时，它才会使用.env中的值。

.env

REACT_APP_API_BASE = 'https://api-staging.mysite.com/api'

.env.local

REACT_APP_API_BASE = 'https://api-qa.mysite.com/api'

应用程序正在对https://api-staging.mysite.com/api/endpoint.进行API调用

我做错了什么？

作为参考，我不是直接运行react-scripts，而是使用CRACO。

package.json

  "scripts": {
    "start": "craco start",
    "build": "craco build"
  },
  "dependencies": {
    "@craco/craco": "^6.0.0",
    "@material-ui/core": "^4.11.2",
    "@material-ui/icons": "^4.11.2",
    "@material-ui/lab": "^4.0.0-alpha.57",
    "@sentry/react": "^6.2.2",
    "@sentry/tracing": "^6.2.2",
    "@sentry/webpack-plugin": "^1.14.0",
    "@stripe/react-stripe-js": "^1.3.0",
    "@stripe/stripe-js": "^1.13.0",
    "mixpanel-browser": "^2.41.0",
    "react": "^16.6.0",
    "react-dom": "^16.0.0",
    "react-gtm-module": "^2.0.11",
    "react-intl": "^5.10.14",
    "react-router-dom": "^5.2.0",
    "react-scripts": "4.0.1",
    "typescript": "^4.1.3",
    "universal-cookie": "^4.0.4",
    "web-vitals": "^0.2.4"
  },
  "devDependencies": {
    "@formatjs/cli": "^3.0.1",
    "@storybook/addon-a11y": "^6.1.20",
    "@storybook/addon-actions": "^6.1.20",
    "@storybook/addon-essentials": "^6.1.20",
    "@storybook/addon-links": "^6.1.20",
    "@storybook/components": "^6.1.20",
    "@storybook/node-logger": "^6.1.20",
    "@storybook/preset-create-react-app": "^3.1.5",
    "@storybook/react": "^6.1.18",
    "@testing-library/jest-dom": "^5.11.9",
    "@testing-library/react": "^11.2.5",
    "@testing-library/user-event": "^12.8.3",
    "@types/jest": "^26.0.20",
    "@types/mixpanel-browser": "^2.35.6",
    "@types/node": "^14.14.20",
    "@types/react": "^17.0.0",
    "@types/react-dom": "^17.0.0",
    "@types/react-gtm-module": "^2.0.0",
    "@types/react-router-dom": "^5.1.7",
    "babel-plugin-formatjs": "^9.0.1",
    "babel-plugin-import": "^1.13.3",
    "dotenv-webpack": "^1.8.0",
    "eslint-plugin-sonarjs": "^0.5.0",
    "hint": "^6.1.1",
    "jest-chain": "^1.1.5",
    "react-test-renderer": "^17.0.1"
  },
  "babel": {
    "presets": [
      "react-app"
    ],
    "plugins": [
      [
        "formatjs",
        {
          "idInterpolationPattern": "[sha512:contenthash:base64:6]",
          "ast": true
        }
      ]
    ]
  },

Answer 1

在悬赏五分钟后，我终于弄明白了.

我的一个文件的顶部有require('dotenv').config();。显然，这是用主.env文件中的任何内容覆盖CRA发现的配置。一旦从我的代码中删除了这一行，一切就都正常了。