add a private static method to a class in javascript

To add a private static method to a class in JavaScript, you can use the "Symbol" data type to create a unique key for the private method. This can be done inside the class definition. Here is an example:

index.tsx
class MyClass {
  static #privateMethod() {
    console.log('This is a private static method.');
  }

  static publicMethod() {
    console.log('This is a public method.');
    MyClass.#privateMethod();
  }
}

MyClass.publicMethod(); // logs 'This is a public method.' and 'This is a private static method.'
MyClass.#privateMethod(); // TypeError: privateMethod is not defined
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In the above example, the "#privateMethod" is a private static method of the "MyClass" class. The "#" before the method name makes it private, which means it can only be accessed within the class. The "publicMethod" is a public static method, which can be accessed from outside the class. Inside the "publicMethod", the private method is called using "MyClass.#privateMethod()".

Note that attempting to call the private method from outside the class will result in a TypeError.