No This Before Super - Denoland

Disallows use of this or super before calling super() in constructors.

The access to this or super before calling super() in the constructor of derived classes leads to ReferenceError. To prevent it, this lint rule checks if there are accesses to this or super before calling super() in constructors.

Invalid:

typescript

class A extends B {
  constructor() {
    this.foo = 0;
    super();
  }
}

class C extends D {
  constructor() {
    super.foo();
    super();
  }
}

Valid:

typescript

class A extends B {
  constructor() {
    super();
    this.foo = 0;
  }
}

class C extends D {
  constructor() {
    super();
    super.foo();
  }
}

class E {
  constructor() {
    this.foo = 0;
  }
}