Class should inherit from a constructor

• INHERIT_NON_CONSTRUCTOR
• Error
• High
• es6

This rule applies when a class inherits from a non-constructor.

When a class inherits from non-constructor values like the following, a TypeError exception occurs:

1. Arrow function
2. Async function
3. Generator function
4. Non-function values except null

Noncompliant Code Example

let Foo = () => { };
class Bar extends Foo { } // INHERIT_NON_CONSTRUCTOR alarm because an arrow function is not a constructor.

Compliant Code Example

let Foo = function () { };
class Bar extends Foo { }

Version

This rule was introduced in DeepScan 1.32.0.

See

• Sub classing with extends