Jack Moore

Email: jack(at)jmoore53.com
Project Updates

Rails Webpack Dev Server

07 Nov 2019 » rails, bootstrap, webpack, webpacker

2 Nights

I spent the past two nights trying to configure my rails 6.0.0 application to work with the webpacker gem and for the life of me I could not get bootstrap working.

I finally got it. Changing a few settings in the webpacker.yml configuration file and renaming a few files fixed the problems I was having.

I am going to walk through this commit file by file near line by line because it has the details of the fix in it. Most everything else is cruft.

Gemfile - Bootstrap Gem

I added the bootstrap gem @ 4.3.1 to my project, Gemfile to add bootstrap the conventional way thinking it may make a difference. I don’t think it did. I plan to go back and remove it from the gemfile.

Gemfile.lock was update as well

Application.js - app/webpack/packs/application.js

You’re going to need to require that file, no wait, just import it.


// Uncomment to copy all static images under ../images to the output folder and reference
// them with the image_pack_tag helper in views (e.g <%= image_pack_tag 'rails.png' %>)
// const images = require.context('../images', true)
// const imagePath = (name) => images(name, true)

import "./style"
import "./application";

$(function() {
$(function () {

$(document).on('load', function () {

Application.scss -> styles.scss

I think the trick to making this work was renaming the Application.scss file to styles.scss.

I think what was happening originally was the webpacker configuration file was loading the stylesheet instead of the js file. What a nightmare.

Javascript Environment - config/webpack/environment.js

Fixed the naming for jQuery and $ to straight up jQuery but I don’t think this changed jquery usage.

  new webpack.ProvidePlugin({
    $: 'jquery',
    jQuery: 'jquery',
    Popper: ['popper.js', 'default']

Webpack Configuration - config/webpacker.yml

Two massive changes include setting webpack_compile_output: to true and setting extract_css to true as well.

© Jack Moore