Tom-Select Example with Stimulus

select_controller.js

import ApplicationController from "./application_controller"
import TomSelect from "tom-select"

export default class extends ApplicationController {
  static values = { url: String }

  connect() {
    super.connect()
    this.initTomSelect()
  }

  disconnect() {
    if (this.select) {
      this.select.destroy()
    }
  }

  initTomSelect() {
    if (this.element) {
      let url = `${this.urlValue}.json`

      this.select = new TomSelect(this.element, {
        plugins: ['remove_button'],
        valueField: 'id',
        labelField: 'name',
        searchField: ['name', 'email'],
        maxItems: 1,
        selectOnTab: true,
        placeholder: "Select user",
        closeAfterSelect: true,
        hidePlaceholder: false,
        preload: true,
        create: false,
        openOnFocus: true,
        highlight: true,
        sortField: {
          field: "name",
          direction: "asc"
        },
        searchField: 'name',
        load: (search, callback) => {
          fetch(url)
            .then(response => response.json())
            .then(json => {
              callback(json);
            }).catch(() => {
              callback();
            });
        },
        render: {
          option: function (data, escape) {
            return '<div>' +
              '<span class="block">' + escape(data.name) + '</span>' +
              '<span class="text-gray-400">' + escape(data.email) + '</span>' +
              '</div>';
          }
        }
      })

    }
  }
}

users_controller.rb

class UsersController < ApplicationController
  def index
    ....
    
    respond_to do |format|
      ...
      format.json { render json: @users.map { |r| {name: r.name, id: r.id, email: r.email} } }
    end
  end
end