Simple Form VS Slim

Compare Simple Form vs Slim and see what are their differences.

Simple Form

Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup. (by heartcombo)

Slim

Slim is a template language whose goal is to reduce the syntax to the essential parts without becoming cryptic. (by slim-template)
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Simple Form Slim
13 30
8,190 5,271
0.1% 0.2%
4.3 7.8
9 days ago about 1 month ago
Ruby Ruby
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

Simple Form

Posts with mentions or reviews of Simple Form. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-08-23.
  • Internationalize and Humanize your Ruby on Rails application
    2 projects | dev.to | 23 Aug 2023
    I also tend to use gems like simple_form to generate my form HTML, and this saves me from having to maintain a lot of view code to outputting translated content onto forms. Also simple_form has it's own i18n convention that compliments the Rails default pretty well.
  • AppDev Week 2
    1 project | dev.to | 10 Jan 2023
  • Rails simple_form gem: Unable to render validation messages
    1 project | /r/rails | 31 Dec 2022
    I followed the RailsCasts tutorial and its GitHub page to set up the gem in my application and used it for all of the models in my application. It was working perfectly fine showing the default error message at the top and the validation message at the bottom of their respective fields.
  • Updating a Booking Status
    1 project | dev.to | 6 Dec 2022
    Okay now for those "buttons". We don't want just a normal button or link though. This is where we need the booking update form. Let's use simple_form_for (check out the docs here).
  • #1 Made easy form in Rails with Simple Form - Gem Weekly
    2 projects | dev.to | 19 Nov 2022
    There are many ways to create a form in Rails, whether you want to create a form with Form builder from Rails itself or maybe using third party gem like simple_form. Of course, simple_form is not the only option we have to build form in rails, there are alternatives out there such as formtastic, cocoon, nested_form, etc. However, in this post I'm going to give you a basic use case to use simple_form in Rails application.
  • Reusable form elements
    1 project | /r/rails | 28 Sep 2022
    I usually go with simple_form, I customise my forms by configuring it and letting it handle the repeated rendering.
  • How to wrap select field in div in SimpleForm?
    1 project | /r/rails | 25 Jul 2022
  • Styling Simple Form forms with Tailwind
    4 projects | dev.to | 20 Jun 2022
    Simple Form gem
  • From partials to ViewComponents: writing reusable front-end code in Rails
    11 projects | dev.to | 3 Jun 2022
    The biggest unclear area that we saw related to view components were forms. There were glimpses of compatibility issues with Rails form helpers in the documentation and we saw a recent effort of the team to mitigate them. Moreover, we were used to building forms with Simple Form which added another variable to the equation. And, in general, we considered the Rails form builders (as well as the Simple Form builder) a system of form-related components in the first place so we were unsure how this would fit into the View Components ecosystem or whether we should even try to do that.
  • Simple Form
    1 project | dev.to | 14 Apr 2022
    Learn more about simple form: 1) https://github.com/heartcombo/simple_form 2) https://www.youtube.com/watch?v=NfZk74R2Oi4&t=5s

Slim

Posts with mentions or reviews of Slim. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-03-01.
  • Building a syntax highlighting extension for VS Code
    12 projects | dev.to | 1 Mar 2024
    I spent a few days of my spare time building a VS Code extension that would bring better syntax highlighting for the Slim template language to the editor. I quite enjoyed most of the process so I’d like to share what I learned.
  • Rails 7.1 Released
    8 projects | news.ycombinator.com | 5 Oct 2023
    I think they mean Server Side Rendering (normal rails controllers/views), and Slim is just the name of the templating engine. It's a little nicer than the default ERB. https://github.com/slim-template/slim

    There's also SSR with react and other js frameworks, but I don't think that's what they meant.

  • How to build a website without frameworks and tons of libraries
    17 projects | news.ycombinator.com | 4 Jul 2023
    I use something very similar on https://lunar.fyi and https://lowtechguys.com but I wouldn’t call this “simple” anymore.

    They use Jinja templating, I prefer Slim (https://github.com/slim-template/slim#syntax-example) which has a more Pythonic syntax (there is plim [0] in Python for that)

    I use Tailwind as well for terse styling and fast experimentation (allows me to write a darkMode-aware and responsive 100 line CSS in a single line with about 10 classes)

    For interaction I can write CoffeeScript directly in the page [1] and have it compiled by plim.

    I run a Caddy static server [2] and use Syncthing [3] to have every file save deployed instantly to my Hetzner server.

    I use entr [4] and livereloadx [5] to rebuild the pages and do hot reload on file save. All the commands are managed in a simple Makefile [6]

    ———

    You can already see how the footnotes take up a large chunk of this comment, this is not my idea of simple. Sure, the end result is readable static HTML and I never have to fight obscure React errors, but it’s a high effort setup for starters.

    Simple for me would be: write markdown files for pages, a simple CSS for general styling (should be optional), click to deploy on my domain. Images should automatically be resized to multiple sizes and optimized, videos re-encoded for smaller filesize etc.

    I have mostly implemented that for myself (https://notes.alinpanaitiu.com/How%20I%20write%20this%20blog...) but it feels fragile. I’d rather pay for a professional solution.

    [0] https://plim.readthedocs.io/en/latest/

    [1] https://github.com/FuzzyIdeas/lowtechguys/blob/main/src/rcmd...

    [2] https://caddyserver.com/docs/command-line#caddy-file-server

    [3] https://syncthing.net

    [4] https://github.com/eradman/entr

    [5] https://nitoyon.github.io/livereloadx/

    [6] https://github.com/FuzzyIdeas/lowtechguys/blob/main/Makefile

  • Do Modern Programming Languages Have to Care About Line Length?
    2 projects | /r/ProgrammingLanguages | 5 Jun 2023
    Checkout slim https://github.com/slim-template/slim it's a templating language
  • Hotwire Question - Controller Lifecycle
    1 project | /r/rails | 18 Feb 2023
    And this is what the HTML looks like (I'm using slim):
  • How to use View Transitions in Hotwire Turbo
    10 projects | dev.to | 16 Feb 2023
    The template renders the tag and inside it the link and the counter itself (the Slim template language and Tailwind styling are used here, hopefully the notation is sufficiently self-explaining):
  • Slim: A HTML Templating Language
    1 project | dev.to | 9 Jan 2023
    In this part of the series, let's explore another popular templating language, Slim.
  • Pug: A HTML Templating Language
    1 project | dev.to | 3 Jan 2023
    Templating languages are widely used in Web development and two of the most popular ones are Pug and Slim. In this series, we're going to learn the basics of these two and hopefully they would help improve your workflow further.
  • Template Engine with percent sign in Rails?
    1 project | /r/rubyonrails | 5 Jul 2022
    You may want to checkout slim I'v tried ERB, SLIM, and HAML and absolutely sware by slim it's very easy to use and saves a ton of typing compared to ERB.
  • Styling Simple Form forms with Tailwind
    4 projects | dev.to | 20 Jun 2022
    This config sets a ”medium“ font weight for our form labels by default. Now, suppose we want a specific input’s label to be bold instead, we might want to try the following naive approach (we’re using the Slim template notation here):

What are some alternatives?

When comparing Simple Form and Slim you can also consider the following projects:

Formtastic - A Rails form builder plugin with semantically rich and accessible markup.

Liquid - Liquid markup language. Safe, customer facing template language for flexible web apps.

Rails Bootstrap Forms - Official repository of the bootstrap_form gem, a Rails form builder that makes it super easy to create beautiful-looking forms using Bootstrap 5.

Haml - HTML Abstraction Markup Language - A Markup Haiku

Cocoon - Dynamic nested forms using jQuery made easy; works with formtastic, simple_form or default forms

Hamlit - High Performance Haml Implementation

Reform - Form objects decoupled from models.

Sanitize - Ruby HTML and CSS sanitizer.

Abracadabra

Tilt - Generic interface to multiple Ruby template engines

ActiveForm - Create nested forms with ease.

tachyons - Functional css for humans