What is `Symbol.hasInstance` used for in JavaScript?

Explanation

`Symbol.hasInstance` allows customizing the behavior of the `instanceof` operator in JavaScript. By defining this symbol, a class or function can control what `instanceof` reports for custom type checking.

Key points

`Symbol.hasInstance` customizes `instanceof` behavior
Helps define custom type checking rules
Not used to check if a Symbol value is an instance of a specific type
Does not return the class that created a Symbol value

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