gitlab-org--gitlab-foss/app/assets/javascripts/visibility_select.js

(() => {
  const gl = window.gl || (window.gl = {});

  class VisibilitySelect {
    constructor(container) {
      if (!container) throw new Error('VisibilitySelect requires a container element as argument 1');
      this.container = container;
      this.helpBlock = this.container.querySelector('.help-block');
      this.select = this.container.querySelector('select');
    }

    init() {
      if (this.select) {
        this.updateHelpText();
        this.select.addEventListener('change', this.updateHelpText.bind(this));
      } else {
        this.helpBlock.textContent = this.container.querySelector('.js-locked').dataset.helpBlock;
      }
    }

    updateHelpText() {
      this.helpBlock.textContent = this.select.querySelector('option:checked').dataset.description;
    }
  }

  gl.VisibilitySelect = VisibilitySelect;
})();