add a private static method to a class in typescript

To add a private static method to a class in TypeScript, you can use the private and static modifiers in the method definition.

Here's an example:

index.ts
class Example {
  private static myPrivateStaticMethod() {
    // implementation
  }
}
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In the above example, the myPrivateStaticMethod() method is both private and static, which means it's only accessible within the Example class and can be called without an instance of the class.

Note that while private methods can only be accessed within the class, static methods can be accessed from anywhere using the class reference, so a combination of private and static modifiers can be useful for encapsulating behavior and ensuring it's only accessible within the class.