ESLint Plugin: eslint-plugin-no-explicit-undefined

Disallow the use of optional operator (?) as an explicit type in TypeScript and instead use undefined instead.

📚 Rule Examples

This rule disallows the use of optional operator (?)as an explicit type in TypeScript. Instead, developers should use undefined.

Examples of incorrect code for this rule ❌

interface Example {
  prop?: string;
}
type Example = { prop?: string };

Examples of correct code for this rule ✅

interface Example {
  prop: string | undefined;
}
type Example = { prop: string | undefined };

🚀 Installation

Install the package using npm:

npm install eslint-plugin-no-implicit-undefined --save-dev

📝 Configuration

To configure the rule, add it to your ESLint configuration file (.eslintrc.json, .eslintrc.js, etc.):

{
  "extends": ["custom"],
  "plugins": ["no-optional-type-declaration"],
  "rules": {
    "no-optional-type-declaration/no-implicit-undefined": "error"
  }
}

📃 License

MIT