I have spent lots of time reading documents in https://auth0.com/docs/libraries/* but in vain. Did I miss something? In which case should I use each one of them? I’d really appreciate your help.

Hey there @tonytonyjan ! No worries, we’ve got you covered. So I would rather go for comparing the auth0.js and auth0-spa-js. Here’s a few words on that from the tool maintainers: https://github.com/auth0/auth0-spa-js/issues/34 There it’s clearly explained. On the other hand we have Lock (for Web …

Can someone explain the difference between auth0-js, auth0-spa-js and auth0-lock?

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konrad.sopala June 10, 2020, 3:11pm 3

Also this one in terms of comparing auth0.js to the SPA version:

Topic		Replies	Views
Auth0-js vs auth0-spa-js vs auth0-lock Get Help auth0js , js , lockjs , auth0-spa-js	2	4834	November 14, 2019
Auth0-lock vs auth0-spa-js Get Help auth0-spa-js , sdks-quickstarts	2	81	May 30, 2025
"auth0-spa-js" vs "auth0-react" Get Help	4	4140	April 7, 2021
Newbie Confusion About Lock vs Auth0.js Get Help	4	7010	January 9, 2019
Auth0-spa-js VS auth0-react Get Help	2	3551	October 15, 2021

Can someone explain the difference between auth0-js, auth0-spa-js and auth0-lock?

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