s2k

s2k

Author of Fast Feedback Using Ruby

Agile Web Development with Rails 7: Reloading assets in development mode

Hi all,

currently I wonder how the Tailwind colours work (or don’t work).

For example, in app/views/layouts/application.html.erb I have this:

<header class="bg-green-600">

and, yes, the header part is indeed green.

But when I change it to, for example

<header class="bg-sky-600">

and reload the page, the background is white. Why is that?
I assumed the examples from the Tailwind docs at https://tailwindcss.com/docs/background-color, can be used elsewhere (read: my local app).
And while that’s true from some of the named colours, it is not for others.
‘bg-blue-700’ yields a strong blue, ‘bg-orange-500’ & ‘bg-fuchsia-600’ is white. A ‘one-off’ colour is also displayed white (or ignored?).

After running

bin/rails assets precompile

these colours are displayed in the browser.
What causes this behaviour? Can it be changed, to get all the colours Tailwind has in store (e.g. also the ‘one-off’ colours such as class="bg-[#50d71e]" (also from the Tailwind docs)?

Cheers
Stephan

Marked As Solved

s2k

s2k

Author of Fast Feedback Using Ruby

Aha, now I see were I went wrong: While, I usually default to using Foreman, I used bin/rails server, which doesn’t watch for Tailwind related changes, while the Procfile.dev does.

It’s nice that bin/dev even installs foreman if it isn’t already there.

Also Liked

rubys

rubys

Author of Agile Web Development With Rails

Short answer: stop your server, run rails assets:clobber, and restart your server.

I guess the question I have to ask: why did you run bin/rails assets:precompile? What that does is to create a static snapshot of your tailwind classes and put the results into your public/assets directory. If that directory exists when the server is started, puma will serve those files and never forward the request to rails at all. The end result is any tailwind classes you try to make use of will be ignored unless they are in that static snapshot.

rubys

rubys

Author of Agile Web Development With Rails

What I did to reproduce the problem:

rails new play --css tailwind
cd play
rails generate scaffold say hello
bin/dev

Adding bg-green-600 to app/views/say/hello.html.erb worked at this point.

Stopping the server, running rails assets:precompile, restarting the server, and then changing the color to bg-sky-600 did not work - the background was white – this matched what you reported.

Stopping the server, running rails assets:clobber, and restarting the server, and I can see the new color. I can then change the color to bg-red-600 and see the results of my change.

Where Next?

Popular Pragmatic Bookshelf topics Top

jesse050717
Title: Web Development with Clojure, Third Edition, pg 116 Hi - I just started chapter 5 and I am stuck on page 116 while trying to star...
New
simonpeter
When I try the command to create a pair of migration files I get an error. user=&gt; (create-migration "guestbook") Execution error (Ill...
New
AleksandrKudashkin
On the page xv there is an instruction to run bin/setup from the main folder. I downloaded the source code today (12/03/21) and can’t see...
New
rmurray10127
Title: Intuitive Python: docker run… denied error (page 2) Attempted to run the docker command in both CLI and Powershell PS C:\Users\r...
New
Chrichton
Dear Sophie. I tried to do the “Authorization” exercise and have two questions: When trying to plug in an email-service, I found the ...
New
adamwoolhether
When trying to generate the protobuf .go file, I receive this error: Unknown flag: --go_opt libprotoc 3.12.3 MacOS 11.3.1 Googling ...
New
jgchristopher
“The ProductLive.Index template calls a helper function, live_component/3, that in turn calls on the modal component. ” Excerpt From: Br...
New
hazardco
On page 78 the following code appears: &lt;%= link_to ‘Destroy’, product, class: ‘hover:underline’, method: :delete, data: { confirm...
New
kolossal
Hi, I need some help, I’m new to rust and was learning through your book. but I got stuck at the last stage of distribution. Whenever I t...
New
mert
AWDWR 7, page 152, page 153: Hello everyone, I’m a little bit lost on the hotwire part. I didn’t fully understand it. On page 152 @rub...
New

Other popular topics Top

axelson
I’ve been really enjoying obsidian.md: It is very snappy (even though it is based on Electron). I love that it is all local by defaul...
New
New
AstonJ
Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face: https://on...
New
AstonJ
I ended up cancelling my Moonlander order as I think it’s just going to be a bit too bulky for me. I think the Planck and the Preonic (o...
New
mafinar
Crystal recently reached version 1. I had been following it for awhile but never got to really learn it. Most languages I picked up out o...
New
PragmaticBookshelf
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
New
PragmaticBookshelf
Rails 7 completely redefines what it means to produce fantastic user experiences and provides a way to achieve all the benefits of single...
New
New
AstonJ
This is a very quick guide, you just need to: Download LM Studio: https://lmstudio.ai/ Click on search Type DeepSeek, then select the o...
New
NewsBot
Node.js v22.14.0 has been released. Link: Release 2025-02-11, Version 22.14.0 'Jod' (LTS), @aduh95 · nodejs/node · GitHub
New

Latest in Agile Web Development with Rails 7

Agile Web Development with Rails 7 Portal

Sub Categories: