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typescript/require-this-void

Require this: void on static class methods.

Targeted pattern scope​

This rule targets static class methods whose function expression parameters do not start with this: void.

What this rule reports​

This rule reports static class methods that do not declare a this: void parameter.

Why this rule exists​

An explicit this: void parameter documents that static methods do not depend on a this context.

❌ Incorrect​

class C {
 static f() {}
}

✅ Correct​

class C {
 static f(this: void) {}
}

Behavior and migration notes​

This rule reports only and does not provide an autofix.

Migration is adding this: void as the first static method parameter.

Options​

This rule has no options.

Additional examples​

class C {
 static parse(this: C, value: string): C {
  return new C();
 }
}
// ❌ reported: first parameter is not `this: void`

class D {
 static parse(this: void, value: string): D {
  return new D();
 }
}
// ✅ valid

ESLint flat config example​

import etcMisc from "eslint-plugin-etc-misc";

export default [
 {
  plugins: { "etc-misc": etcMisc },
  rules: {
   "etc-misc/typescript/require-this-void": "error",
  },
 },
];

When not to use it​

Disable this rule if your project does not enforce explicit static-method this typing.

Package documentation​

Rule catalog ID: R130

Further reading​

Adoption resources​

  • Start at warning level in CI, then move to error after cleanup.
  • Use focused codemods/autofix batches per package or directory.