What anti-patterns in TypeScript do you know?

In TypeScript, there are several common anti-patterns that can lead to degraded code quality and loss of typing benefits:

• Using the any type everywhere — this removes all the benefits of static typing and turns the code into JavaScript with types.
• Ignoring strict compiler settings (strict: true) — disabling strict checks reduces type safety.
• Overloading interfaces and types unnecessarily — causes excessive complexity and confusion.
• Misusing unknown and never — for example, ignoring handling of unknown or incorrect use of never.
• Duplicating types instead of reusing through interfaces or types — leads to inconsistency.
• Using classes where functions and types suffice — unnecessary object-oriented complexity.

Example of poor any usage:

function process(data: any) {
  // No type checks, possible runtime errors
  console.log(data.property);
}

It's better to use specific types or unknown with checks.