The flags accessor property of RegExp instances returns the flags of this regular expression.

The endsWith() method of String values determines whether a string ends with the characters of this string, returning true or false as appropriate.

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The Symbol.toPrimitive static data property represents the well-known symbol Symbol.toPrimitive. All type coercion algorithms look up this symbol on objects for the method that accepts a preferred type and returns a primitive representation of the object, before falling back to using the object's valueOf() and toString() methods.

The AsyncGeneratorFunction() constructor creates AsyncGeneratorFunction objects.

The Number.parseInt() static method parses a string argument and returns an integer of the specified radix or base.

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The has() method of WeakSet instances returns a boolean indicating whether the specified value exists in this WeakSet or not.

The delete() method of WeakSet instances removes the specified value from this set, if it is in the set.