Hi, Per the Jquery official document, they have removed the` jQuery.trim()` function. - https://api.jquery.com/jQuery.trim/ - https://github.com/jquery/jquery/pull/4695 However, I saw the Jquery3 in this lib still contains `trim()` function. https://github.com/rails/jquery-rails/blob/master/vendor/assets/javascripts/jquery3.js#L10811