Question 50294 in Javascript Question posted in
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Call class method within try catch block? – Javascript

I have encountered with something like this:

class Example {
  // ...

  async #privateMethod() {
    return true
  }

  static staticMethod() {
    try {
       // can't access #privateMethod
      this.#privateMethod()
    } catch (error) {
      console.log('error', error);
    }
  }
}

I want to call a private method within the static method, but I can’t access the private method for some reason. What am I doing wrong, please?

Tags:

2

Answers


  1. 0

    In a static method there is nothing like this. This is the instance of an class created with

    myClassInstance = new Classname();

    And then you call the methods with

    MyClassInstance.myMethod();

    In this method you can then use this as a pointer to the myClassInstance.

    A static method is called without such an instance so you have no this and so you can’t call non static methods.

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  2. 0

    That private method is an instance method, meaning you would need this to be an instance of Example to do this.#privateMethod.

    When running a static method, you don’t have an instance. Instead, this refers to the constructor (the "class").

    This may be an indication that #privateMethod shouldn’t be an instance method after all, as it could do its job without one.

    If this is the case, then just make that private method also static:

    class Example {
  // ...

  static async #privateMethod() {
    console.log("running private static method");
    return true;
  }

  static staticMethod() {
    try {
      this.#privateMethod()
    } catch (error) {
      console.log('error', error);
    }
  }
}

Example.staticMethod();
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