@studnicky/hash-private-fields

Disallows underscore-prefixed class members — the _bar convention for signalling "private" is a stylistic hint only, not enforced by the language. Use a real #bar-style private field or method instead, which the compiler and runtime actually protect. The rule checks MethodDefinition and PropertyDefinition nodes with a non-computed Identifier key starting with _; an explicit private/protected TS accessibility modifier does not exempt an underscore-prefixed name, since the underscore itself is what's banned. Plain TS accessibility modifiers without an underscore, object literal properties (not class members), and computed keys (name cannot be statically proven) are not flagged.

Fixable: No · Options: No · Suggested severity: error

✗ Incorrect

// underscore-prefixed field
class A {
  _bar = 1;
}

// underscore-prefixed method
class A {
  _bar(): void {}
}

// underscore-prefixed field even with an explicit private modifier
class A {
  private _bar = 1;
}

// underscore-prefixed getter
class A {
  get _bar(): number { return 1; }
}

✓ Correct

// real private field/method
class A {
  #bar = 1;
  #baz(): void {}
}

// TS accessibility modifiers without an underscore — not reported
class A {
  protected bar = 1;
  private baz(): void {}
}

// computed key — name cannot be statically proven, not reported
class A {
  ['_bar'] = 1;
}