Bootstrap/js/src/alert.js

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v5.0.0-beta2): alert.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 * --------------------------------------------------------------------------
 */

import {
  defineJQueryPlugin,
  emulateTransitionEnd,
  getElementFromSelector,
  getTransitionDurationFromElement
} from './util/index'
import Data from './dom/data'
import EventHandler from './dom/event-handler'
import BaseComponent from './base-component'

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

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

const SELECTOR_DISMISS = '[data-bs-dismiss="alert"]'

const EVENT_CLOSE = `close${EVENT_KEY}`
const EVENT_CLOSED = `closed${EVENT_KEY}`
const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`

const CLASS_NAME_ALERT = 'alert'
const CLASS_NAME_FADE = 'fade'
const CLASS_NAME_SHOW = 'show'

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

class Alert extends BaseComponent {
  // Getters

  static get DATA_KEY() {
    return DATA_KEY
  }

  // Public

  close(element) {
    const rootElement = element ? this._getRootElement(element) : this._element
    const customEvent = this._triggerCloseEvent(rootElement)

    if (customEvent === null || customEvent.defaultPrevented) {
      return
    }

    this._removeElement(rootElement)
  }

  // Private

  _getRootElement(element) {
    return getElementFromSelector(element) || element.closest(`.${CLASS_NAME_ALERT}`)
  }

  _triggerCloseEvent(element) {
    return EventHandler.trigger(element, EVENT_CLOSE)
  }

  _removeElement(element) {
    element.classList.remove(CLASS_NAME_SHOW)

    if (!element.classList.contains(CLASS_NAME_FADE)) {
      this._destroyElement(element)
      return
    }

    const transitionDuration = getTransitionDurationFromElement(element)

    EventHandler.one(element, 'transitionend', () => this._destroyElement(element))
    emulateTransitionEnd(element, transitionDuration)
  }

  _destroyElement(element) {
    if (element.parentNode) {
      element.parentNode.removeChild(element)
    }

    EventHandler.trigger(element, EVENT_CLOSED)
  }

  // Static

  static jQueryInterface(config) {
    return this.each(function () {
      let data = Data.getData(this, DATA_KEY)

      if (!data) {
        data = new Alert(this)
      }

      if (config === 'close') {
        data[config](this)
      }
    })
  }

  static handleDismiss(alertInstance) {
    return function (event) {
      if (event) {
        event.preventDefault()
      }

      alertInstance.close(this)
    }
  }
}

/**
 * ------------------------------------------------------------------------
 * Data Api implementation
 * ------------------------------------------------------------------------
 */
EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DISMISS, Alert.handleDismiss(new Alert()))

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

defineJQueryPlugin(NAME, Alert)

export default Alert