Example of a type guard with a type predicate using an ajv validator to determine if the object matches a schema

TypeGuardWithTypePredicate.ts

// where you might have something like this and check a single property exists
isMyType(toCheck: any): toCheck is MyType {
    return !!toCheck.propertyOfMyType
}

/**
 Now we can have a generic function that takes type, and we can verify 
 that the whole object validates against a schema, rather than just checking
 a property or two
*/
is<T>(toCheck: any): toCheck is T {
    return !!this.ajvValidator()(toCheck)
}