Characters allowed before optional chaining

alert⟦09⟧?.(9)

alert
?.(10)

alert0x0B?.(11)

alert0x0C?.(12)

alert0x0D?.(13)

alert ?.(32)

alert ?.(160)

alert ?.(5760)

alert ?.(8192)

alert ?.(8193)

alert ?.(8194)

alert ?.(8195)

alert ?.(8196)

alert ?.(8197)

alert ?.(8198)

alert ?.(8199)

alert ?.(8200)

alert ?.(8201)

alert ?.(8202)

alert
?.(8232)