<% knob_options.each_with_index do |value, index| %> <%= form.radio_button name, value.days, data: { action: "change->knob#optionChanged change->form#submit", index: index, knob_target: "option" } %> <%= value %> <% end %> <%= form.range_field :slider, class: "knob__slider", data: { action: "input->knob#sliderChanged change->form#submit", knob_target: "slider" }, "aria-hidden": true, max: knob_options.length - 1, min: 0 %>