Web Reference: Class Inheritance To create a class inheritance, use the extends keyword. A class created with a class inheritance inherits all the methods from another class: Jul 8, 2025 Β· A class can only have a single superclass, so multiple inheritance from tooling classes, for example, is not possible. The functionality must be provided by the superclass. May 12, 2022 Β· Class syntax allows to specify not just a class, but any expression after extends. For instance, a function call that generates the parent class: Here class User inherits from the result of f("Hello").
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