@mdbootstrap/bootstrap-dark-mode/src/js/bootstrap/mdb-prefix/button.js

Responsive Dark Mode theme built with Bootstrap 5 with Dark Mode toggle button that switches between dark and light themes.

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v5.1.3): button.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 * --------------------------------------------------------------------------
 */

import { defineJQueryPlugin } from './util/index';
import EventHandler from './dom/event-handler';
import BaseComponent from './base-component';

/**
 * ------------------------------------------------------------------------
 * Constants
 * ------------------------------------------------------------------------
 */

const NAME = 'button';
const DATA_KEY = 'bs.button';
const EVENT_KEY = `.${DATA_KEY}`;
const DATA_API_KEY = '.data-api';

const CLASS_NAME_ACTIVE = 'active';

const SELECTOR_DATA_TOGGLE = '[data-mdb-toggle="button"]';

const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`;

/**
 * ------------------------------------------------------------------------
 * Class Definition
 * ------------------------------------------------------------------------
 */

class Button extends BaseComponent {
  // Getters

  static get NAME() {
    return NAME;
  }

  // Public

  toggle() {
    // Toggle class and sync the `aria-pressed` attribute with the return value of the `.toggle()` method
    this._element.setAttribute('aria-pressed', this._element.classList.toggle(CLASS_NAME_ACTIVE));
  }

  // Static

  static jQueryInterface(config) {
    return this.each(function () {
      const data = Button.getOrCreateInstance(this);

      if (config === 'toggle') {
        data[config]();
      }
    });
  }
}

/**
 * ------------------------------------------------------------------------
 * Data Api implementation
 * ------------------------------------------------------------------------
 */

EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, (event) => {
  event.preventDefault();

  const button = event.target.closest(SELECTOR_DATA_TOGGLE);
  const data = Button.getOrCreateInstance(button);

  data.toggle();
});

/**
 * ------------------------------------------------------------------------
 * jQuery
 * ------------------------------------------------------------------------
 * add .Button to jQuery only if jQuery is present
 */

defineJQueryPlugin(Button);

export default Button;