[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2022-07-27 UTC."],[],[],null,["# PhoneMultiFactorAssertion | JavaScript SDK\n\n- [firebase](/docs/reference/node/firebase).\n- [auth](/docs/reference/node/firebase.auth).\n- PhoneMultiFactorAssertion\n======================================================================================================================\n\nThe class for asserting ownership of a phone second factor.\n\nIndex\n-----\n\n### Constructors\n\n- [constructor](/docs/reference/node/firebase.auth.phonemultifactorassertion#constructor)\n\n### Properties\n\n- [factorId](/docs/reference/node/firebase.auth.phonemultifactorassertion#factorid)\n\nConstructors\n------------\n\n### Private constructor\n\n- new PhoneMultiFactorAssertion ( ) : [PhoneMultiFactorAssertion](/docs/reference/node/firebase.auth.phonemultifactorassertion)\n-\n\n #### Returns [PhoneMultiFactorAssertion](/docs/reference/node/firebase.auth.phonemultifactorassertion)\n\nProperties\n----------\n\n### factorId\n\nfactorId: string\nInherited from [MultiFactorAssertion](/docs/reference/node/firebase.auth.multifactorassertion).[factorId](/docs/reference/node/firebase.auth.multifactorassertion#factorid) \nThe identifier of the second factor."]]
The class for asserting ownership of a phone second factor.