Class list helper for HTML tags

rubyonrails-core
1

Hi Core List

The usual way to conditionally add classes to html tags is in the following form:

This is hard to read and nod very convenient. ReactJS has an Addon to use a Hash (Javascript Object) to conditionally add classes (GitHub - JedWatson/classnames: A simple javascript utility for conditionally joining classNames together).

Inspired by this I’d like to add a helper to ActionView which does exactly that. So you can write:

or

<%= content_tag_for :tr, @model, class: class_list(‘foo’, ready: @model.ready?) do %>

How do you like this idea? Where should that go? New gem? The newly extracted content tag gem? Action View Helpers?

Regards

phil

2

Hi Philippe,

you should be able to use Rails’ ability to pass in an array of classes, and Ruby’s parentheses to create a scope, to handle this scenario for you:

<%= content_tag_for :tr, @model, class: [‘foo’, (‘ready’ if @model.ready?)] do %>

That should give you the same html response you expect, without the need to extend the framework :slight_smile:

Hope that helps.