no-static-only-class

Disallow classes containing only static members

A class containing only static members uses an instance-bearing declaration as a module namespace.
Instead, you SHOULD declare its constants, functions, and types directly in the source module.

Inheritance may supply instance behavior, so derived classes retain their declaration.

- Category: style
- Level: warning
- Fix: none
- Scope: module

Reported

class MathHelper {
    static double(value: int32): int32 {
        return value * 2;
    }
}
Accepted

function double(value: int32): int32 {
    return value * 2;
}
Prior art

- eslint-plugin-unicorn · no-static-only-class

language/linter/src/rules/style/nostaticonlyclass.rs:6