If you need to upgrade code that uses the old jQuery methods bind, delegate, live, unbind and die, the attached article has examples how to migrate to the new on and off versions.

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

Prevents you from data breaches and liability risks
Upgrade at your own pace
Works with modern Rubies

Migrating legacy jQuery code to .on() and .off()

Rails Long Term Support