Universal Containers decided to transition from Classic to Lightning Experience. They asked a developer to replace a JavaScript button that was being used to create records with prepopulated values…

Record-triggered flows automate processes based on record changes (creation, update, deletion) and execute in the background, rather than providing an interactive UI element for users to initiate record creation with prepopulated values.

Apex triggers are programmatic solutions that execute before or after DML operations on records and are used for complex backend logic, not for replacing a user-facing button that initiates record creation with prepopulated fields.

Validation rules enforce data integrity by preventing records from being saved if they don't meet specified criteria; they do not create records or prepopulate field values.

Quick Actions allow users to quickly create records with pre-defined field values directly from a record page or the global actions menu, providing a declarative way to replace the functionality of a Classic JavaScript button for prepopulating fields during record creation. They are specifically designed for efficient data entry and interaction within the Lightning Experience UI.