CODEWITHSUNDEEP
javascriptecmascript-6
doubleya
doubleya

Reputation: 539

access constructor var in static method (es6)

Running into a situation where I have the following code:

class SomeClass{
    constructor(){
        let name="john doe"
    }

    static newName(){
        //i want to get the "name" variable here   
    }
}

In my console.log when i access newName(), I'm unable to get the reference of name variable which I understand, the class isn't instantiated when I call the static method. So I guess my question is, what would be the best way for me to go about calling newName() and accessing the name variable? I can create a variable above the class let name="john doe" and access it that way, but i'd like to figure out a way to keep everything confined in the class.

Upvotes: 1

Views: 7010

Answers (1)

Julio Betta
Julio Betta

Reputation: 2295

First off, let's forget about the static for now. So, your class should be like this:

class SomeClass {
  constructor() {
    this.name = "john doe";
  }

  newName() {
    return this.name;
  }
}

See the variable name? If you declare it with let (or var, or const), it would be defined as local variable in the constructor. Thus, it can only be used inside the constructor method. Now, if you set it with the keyword this, it will be defined as an instance variable, therefore, it can be accessed throughout your class.

Let's see now how you can instantiate your class and call the method newName:

let someClass = new SomeClass(),
    name      = someClass.newName();

If you really want to use a static method, keep in mind that everything that happens inside it, is not attached to the instance of the object.

You can read more about es6 classes here.

Upvotes: 2

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