constructor-super
Recommended
Verifies the correct usage of constructors and calls to super()
.
Verifies the correct usage of constructors and calls to super()
.
Defined constructors of derived classes (e.g. class A extends B
) must always
call super()
. Classes which extend non-constructors (e.g.
class A extends null
) must not have a constructor.
Invalid:
class A {}
class Z {
constructor() {}
}
class B extends Z {
constructor() {} // missing super() call
}
class C {
constructor() {
super(); // Syntax error
}
}
class D extends null {
constructor() {} // illegal constructor
}
class E extends null {
constructor() { // illegal constructor
super();
}
}
Valid:
class A {}
class B extends A {}
class C extends A {
constructor() {
super();
}
}
class D extends null {}