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Migrating Rails from Asset Pipeline to Webpacker: Uncaught ReferenceError: $ is not defined in rails-ujs.js


Migrating Rails from Asset Pipeline to Webpacker: Uncaught ReferenceError: $ is not defined in rails-ujs.js

By : Birdman
Date : October 25 2020, 07:10 PM
With these it helps In the meantime, I figured out what I had done wrong. I needed to configure an alias. I found the solution in the docs https://github.com/rails/webpacker/blob/master/docs/webpack.md#configuration
Adding environment.config.set('resolve.alias', {jquery: 'jquery/src/jquery'}); to my /config/webpacker/environment.js did the trick.
code :
const { environment } = require('@rails/webpacker');
const webpack = require('webpack');

environment.plugins.append("Provide", new webpack.ProvidePlugin({
  $: 'jquery',
  jQuery: 'jquery',
  Popper: ['popper.js', 'default']
}));

environment.config.set('resolve.alias', {jquery: 'jquery/src/jquery'});

module.exports = environment;


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Webpacker/Typescript can't resolve rails asset pipeline file

Webpacker/Typescript can't resolve rails asset pipeline file


By : user2462709
Date : March 29 2020, 07:55 AM
hope this fix your issue It turns out that I needed to add a definition for the .gif extension.
Creating typings.d.ts with:
code :
declare module "*.gif";
rails 5.2 Webpacker asset pipeline

rails 5.2 Webpacker asset pipeline


By : Luciano Di Primio
Date : March 29 2020, 07:55 AM
may help you . As far as I know, webpacker is not going through the asset pipeline. If you have a Rails 5.x project, you can use the asset pipeline (check your Rails version in the gemfile) next to webpacker.
With the same boilerplate I made it work by following these steps:
Webpacker & Rails Asset Pipeline in Docker - View is not pointing to updated JS asset

Webpacker & Rails Asset Pipeline in Docker - View is not pointing to updated JS asset


By : user2799989
Date : March 29 2020, 07:55 AM
it fixes the issue I have managed to resolve the issue and now have live reloading of my javascript assets.
The first issue I had was the easiest to resolve and immediately fixed the problem for team members that were running on their local machine (ie. not in a Docker container).
Rails 6 app install Glide.js using Yarn (webpacker) - Uncaught ReferenceError: Glide is not defined

Rails 6 app install Glide.js using Yarn (webpacker) - Uncaught ReferenceError: Glide is not defined


By : user3404789
Date : March 29 2020, 07:55 AM
around this issue In Webpack-land, you'll typically need to import a given module explicitly in every file where you want to use it. So, even though you imported Glide in app/javascripts/packs/front.js, if you want to reference it in new_slider.js, you'll need to import it there as well:
code :
// new_slider.js
import Glide from '@glidejs/glide';

// ...
Rails webpacker OpenLayers. Uncaught ReferenceError: ol is not defined. Fixed but not solved

Rails webpacker OpenLayers. Uncaught ReferenceError: ol is not defined. Fixed but not solved


By : user3515455
Date : March 29 2020, 07:55 AM
around this issue In your example, you're calling ol.Map, but you've imported Map. Edit your Webpack JS as follows:
code :
import Map from 'ol/Map'

// ... other imports

const map = new Map({   // replaces ol.Map
    target: 'map',
    layers: [
// ...
import * as ol from 'ol';

new ol.Map() // but not ol.LayerGroup, for example ... 
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