how to use environment.ts in angular code example

Example 1: adding prod environment file in angular8

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      export const environment = {
  production: false,
  apiUrl: 'http://my-api-url'
};

Example 2: adding prod environment file in angular8

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      {
  "/api": {
    "target": "http://localhost:3000",
    "secure": false,
    "pathRewrite": {
      "^/api": ""
    }
  }
}