PayPalMigrating from checkout.js to the PayPal JS SDK JavaScript v3SDKCaret downCurrent Braintree SDKsAndroid v4iOS v6JavaScript v3Previous VersionsAndroid v3iOS v5JavaScript v2 availabilityThis page is only relevant for JavaScript v3 PayPal custom integrations (not Drop-in UI).This guide won't be relevant to you if: You are using the v2 JavaScript SDK (we recommend migrating to v3 of the JavaScript SDK first) You are using the Android or iOS SDKs You are using the Drop-in UI to process PayPal You are starting a new PayPal web integration See alsoBraintree JavaScript SDK reference documentation