Asset pipeline: Reasons why your stylesheet is empty
It might be one of the following:
- You are looking at a manifest file (like
application.css) which is always empty during development - Your Sass file has a syntax error it did not handle properly
Related cards:
Rails asset pipeline: Why relative paths can work in development, but break in production
The problem
When using the asset pipeline your assets (images, javascripts, stylesheets, fonts) live in folders inside app:
app/assets/fonts
app/assets/images
app/assets/javascripts
app/assets/stylesheets
Wit...
Why your all.js is empty on staging or production
When you include a non-existing Javascript file, you probably won't notice it during development. But with caching active (on production or staging) Rails will write an empty all.js file without complaining.
Migration from the Asset Pipeline to Webpacker
This is a short overview of things that are required to upgrade a project from the Asset Pipeline to Webpacker. Expect this upgrade to take a few days even the diff is quite small afterwards.
Preparations
1. Find all libraries that are bund...
How to make your application assets cachable in Rails
Note: Modern Rails has two build pipelines, the asset pipeline (or "Sprockets") and Webpacker. The principles below apply for both, but the examples shown are for Sprockets.
Every page in your application uses many assets, su...
Managing vendor libraries with the Rails asset pipeline
The benefit of the Rails asset pipeline is that it compiles your stylesheets and javascripts to a single file, respectively. However, the consequences are startling if you don't understand them. Among others, the raw asset pipeli...
Asset Pipeline Basics
The Rails asset pipeline improves delivery of application assets (javascripts, stylesheets, images, fonts). Here are some basic facts about its inner workings.
No magic
Manifests are the handle on your assets:
app/assets/stylesheets/appl...
Rails asset pipeline: Using ESNext without a transpiler
If your app does not need to support IE11, you can use most ES6 features without a build step. Just deliver your plain JavaScript without transpilation through Babel or TypeScript, and modern browsers will run them natively.
Features supported by...
5 reasons why I won't steal your idea
Since I'm a software architect and a web developer, I get often approached by people with their new ideas. In most cases, for some quality feedback, and on lucky days, for a rough quote about the costs of such a project. These people are usually...
include_tags with the asset pipeline
You can include files from app/assets or from the public folder with javascript_include_tag. The subtle difference that tells rails how to build the path correctly is a single slash at the beginning of the path:
<%= javascript_include_t...
LoDash: isBlank and isPresent mixins
When you need to check a value for presence, don't rely on JavaScript since it considers 0 or "0" false. Also don't rely on LoDash's _.isEmpty:
if ('0') { ... } // false
if (0) { ... } // false
^
if (!_.isEmpty('0')) { ... }...