Found no `super()` in constructorJS-0226
Constructors of derived classes must call super(). Constructors of non derived classes must not call super(). If this is not observed, the JavaScript engine will raise a runtime error. Thus, the super() call must be valid.
Bad Practice
class A {
constructor() {
super(); // This is a SyntaxError.
}
}
class A extends B {
constructor() { } // Would throw a ReferenceError.
}
// Classes which inherits from a non constructor are always problems.
class A extends null {
constructor() {
super(); // Would throw a TypeError.
}
}
class A extends null {
constructor() { } // Would throw a ReferenceError.
}
Recommended
class A {
constructor() { }
}
class A extends B {
constructor() {
super();
}
}