Migrating from checkout.js to the PayPal JS SDK

This 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