Rails UJS in pure JavaScript, with no jQuery dependency.

Based on code of Łukasz Niemier.

Consider it if you do not need to support IE<10 and have no other jQuery dependency in your front-end codebase.

Resources to make an educated guess:

• jQuery's size
• You might not need jQuery
• Browser usage
• Discussion in Rails-UJS issue tracker

As usual:

Gemfile

gem 'vanilla-ujs'

Run bundle and have the asset pipeline pick it up:

app/assets/javascripts/application.js

//= require vanilla-ujs

vanilla-ujs supports all ever green browsers (including IE10+).