Herb: Powerful and seamless HTML-aware ERB parsing and tooling

Initially thought it was an addon (or JS lib) that allowed for using Ruby as an embedded client-side scripting language that would parse in-line Ruby in the HTML.

Clearer once I realized it was closer to PHP or similar language usages.

Second also to the recommendation about a quick definition of ERB (Embedded RuBy). Had to look it up.

A few practical examples of what an actual user might want to do with HTML + ERB could be helpful.

  - Client characteristics customization
  - Previous use history customization
  - The database Create, Read, Update, and Delete cycle using Herb
  - A basic Content Management System example
  - A basic e-commerce example
  - A basic RESTful API example

It works pretty seamlessly and you get something like this:

    @app.post('/part/add')
    def create_part(part_number: str, name: str, description: str):
        p = Part(part_number=part_number, name=name, description=description)
        p.save()
        return (p,
            Input(placeholder="part number", id="part_number", hx_swap_oob='true'),
            Input(placeholder="description", id="description", hx_swap_oob='true'),
            Input(placeholder="name", id="name", hx_swap_oob='true'))

  <p :for={para <- paras} class={para.class} {para.attrs}>
    {para.text}
  </p>

Template engines like liquid are good for simpler use cases where you'd want your end users to write templates (who aren't programmers)

(ERB is, I think, “embedded Ruby”, and it functions basically like old school PHP: you just insert pieces of Ruby code wrapped by <% .. %> or <%= .. %>: https://github.com/ruby/erb#recognized-tags)