init-declarations

Require or disallow initialization in variable declarations.

🧱

This is an "extension" rule that replaces a core ESLint rule to work with TypeScript. See Rules > Extension Rules.

This rule extends the base init-declarations rule from ESLint core. It adds support for TypeScript's declare variables.

Options

See eslint/init-declarations's options.

How to Use

Flat Config

eslint.config.mjs

export default tseslint.config({
  rules: {
    // Note: you must disable the base rule as it can report incorrect errors
    "init-declarations": "off",
    "@typescript-eslint/init-declarations": "error"
  }
});

Legacy Config

.eslintrc.cjs

module.exports = {
  "rules": {
    // Note: you must disable the base rule as it can report incorrect errors
    "init-declarations": "off",
    "@typescript-eslint/init-declarations": "error"
  }
};

Try this rule in the playground ↗

Resources

• Rule source
• Test source

^{Taken with ❤️ from ESLint core.}