Webpack is a tool that allows you to pre-process, bundle and use ES6 like syntax inside Javascript. Webpacker then takes all of those features and starts to merge the ES6 Javascript world with the Asset pipeline for CSS and other more static assets.
Think of packs as entry points of javascript files into specific spots in a Rails app. As your application grows, using packs to specify specific libraries and functionality within specific templates or sections of your application helps make sure your Javascript stays modular and compartmentalized.
If you have used Heroku or other hosting vendors, you may see reference to Procfile. The simplest definition of a Procfile is that it allows you to specify a list of different process types and lets another system Heroku, Foreman gem, etc.
When developing locally, the easiest step to take is to use the gem Foreman. To add this gem, add it to the development group in your Gemfile and bundle install :.
Meaning the same level as your Gemfile. You may notice that instead of rails s , you see bundle exec puma. This change is due to how you would want to run Puma directly in most environments. If you were to start your environment with Foreman and this procfile, you would use the following on the command line:. That command starts up a process for each line in your Procfile.
Thus, in this case, a process for Puma, to run the Rails server. So, how can we make development use rails s to keep the fancy logs? We can create a secondary Procfile that is utilized just for development. Very simply, it is a server that runs in the background that allows you to develop your Javascript, handles automatic reloads and makes sure packs are served to you your development Rails server. To get this Procfile running instead, you simply just need to add a field to your command line syntax:.
Hey Ryan, I believe that what's happening is that the browser doesn't know it's HTML and so it escapes the string for safety. This insertAdjactentHTML method is super handy because it lets you choose where around that element the new content should go.
And icing on the cake is a quick look at the docs reveals the above method is much faster than direct innerHTML manipulation. I do my best. I'm not sure how modern any JS methods are these days because of babel Will do. Any recommendations? Should I continue to utilize JQuery when Rails seems to be moving away?
Or am I wrong in assuming so just because of the dependency drop? Just because Rails isn't using it, doesn't mean you should think it's going out of style.
It's still used by like half the internet lol. Feel free to use jQuery especially because there are so many libraries that use it. If you choose not to, you can't use any of them and have to find alternatives or build things from scratch.
It was mostly designed as a compatibility layer to make things easier across browsers. That's why Rails said well, it's probably good enough to drop the dependency and simplify our framework a little. Less dependencies is usually good. You also have Babel which lets you write modern Javascript and it compiles down to backwards compatible JS. This way you can also understand the idea and apply it to your own views. Now we need the method that will do the AJAX magic. For simplicity you could have something like this:.
Notice the type of format, there's no html view because we don't need it. We're going through JS. Therefore, we need to create a javascript file, which will repopulate the div in the second column.
Let's look at this line with care. I'm rendering the same partial I was rendering in items index, and the local variable for the partial is now the array of Item instances that match a given category. Hi, thanks for the article. I don't understand the connection between 'fetch items path' and the 'from category' action in your items controller.
I do not understand how that works. Thank you! Thank you for writing this, it was super helpful. As it's pointed out just beneath the routes file, the remote: true hash tell Rails that the anchor element must respond in Javascript format triggerin the Ajax logic , instead of the usual HTML. Note that the controller method has to respond in this format also, otherwise is of no use.
Making the content minimal and concentrating on the mechanism was a good idea. Open main menu. Hrishi Mittal. Twitter Facebook. Rails shipped without jQuery as a dependency for the first time with version 5. Rails used to rely on jQuery for Unobtrusive JavaScript features but now ships with its own library rails-ujs with the same features.
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