Modern Rails select

<%= f.choices :large_field, size: :lg %>
<%= f.choices :default_field %>
<%= f.choices :small_field, size: :sm %>

<%= f.choices :languages, ["English", "Spanish", "French", "German", "Italian"], { hint: "Choose languages you speak" }, { multiple: true } %>
<%= f.choices :skills, ["JavaScript", "Ruby", "Python", "Go", "Rust"], { hint: "Select multiple skills" }, { multiple: true, data: { max_item_count: 2 } } %>

<%= f.choices :country, ["Yes", "No"], {}, { data: { search: countries_path(format: :json) } } %>

<%= f.choices :gender, ["Male", "Female", "Other"], {}, { data: { searchEnabled: true } } %>

<%= f.choices :custom_label, ["Option 1", "Option 2"], { include_blank: "Select option…" }, { label: "Custom Label Text" } %>
<%= f.choices :no_label, ["Yes", "No"], {}, { label: false } %>

<%= f.choices :no_label, ["Yes", "No"], {}, { hint: "Select an option" } %>

<%= f.choices :disabled_field, ["Option 1", "Option 2"], { selected: "Option 1" }, { disabled: true } %>

<!-- Active Record Validations works automatically -->
<%= f.choices :state, options_for_select([["California", "CA"], ["New York", "NY"], ["Texas", "TX"]]), { include_blank: "Select state…" } %>

<!-- You are able to add custom error messages -->
<%= f.choices :state, options_for_select([["California", "CA"], ["New York", "NY"], ["Texas", "TX"]]), { include_blank: "Select state…" }, { error: "This field has a custom error" } %>