Dede said about 7 years ago on Decoding and Interacting with Barcodes :

In my project i don't use turbolinks, do you know what can i do to fix this part of the JS code?

$(document).on('turbolinks:load', load_quagga);

this is my application.js

//= require jquery

//= require jquery_ujs

//= require jquery-ui

//= require autocomplete-rails

//= require jquery.min

//= require bootstrap

//= require twitter/bootstrap

//= require bootstrap/modal

//= require bootstrap-datepicker

//= require bootstrap-datepicker/core

//= require maskedinput

//= require fusioncharts/fusioncharts

//= require fusioncharts/fusioncharts.charts

//= require fusioncharts/fusioncharts.theme.fint

//= require demo

//= require dash

//= require jquery.touchSwipe.min

//= require sweetalert

//= require dropzone

//= require progressbar

//= require quagga.min

//= require quagga

//= require_tree .