In the constructor of a derived class, accessing ``++this++`` or ``++super++`` before ``++super()++`` is called raises a reference error. ``++super()++`` should always be called first.


== Noncompliant Code Example

----
class Bar {
}

class Foo extends Bar {
    constructor() {
        this.val = 0;   // Noncompliant
        super();
    }
}

class Foobar extends Foo {
    constructor() {
        super.val = 1;   // Noncompliant
        super();
    }
}

----


== Compliant Solution

----
class Bar {
}

class Foo extends Bar {
    constructor() {
        super();
        this.val = 0;
    }
}

class Foobar extends Foo {
    constructor() {
        super();
        super.val = 1;
    }
}
----



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== Comments And Links
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