.eslintrc.json

{
  "root": true,
  "extends": ["react-app", "react-app/jest"],
  "ignorePatterns": ["build/*", "data/*"],
  "overrides": [
    {
      "files": ["**/*.ts?(x)"],
      "rules": {
        "@typescript-eslint/naming-convention": [
          "error",
          {
            // variables, functions and properties must be camelCase
            "selector": "variableLike",
            "format": ["camelCase"],
            "leadingUnderscore": "allow"
          },
          {
            // properties, methods, accessors and enum members must be camelCase
            "selector": "memberLike",
            "format": ["camelCase"]
          },
          {
            // functions must be camelCase or PascalCase
            "selector": "function",
            "format": ["camelCase", "PascalCase"]
          },
          {
            // global constants must be UPPER_CASE or PascalCase
            "selector": "variable",
            "modifiers": ["global", "const"],
            "format": ["UPPER_CASE", "PascalCase"]
          },
          {
            // interfaces must be PascalCase and start with I
            "selector": "interface",
            "format": ["PascalCase"],
            "custom": {
              "regex": "^I[A-Z]",
              "match": true
            }
          }
        ]
      }
    }
  ]
}