bootstrap-italia/src/js/plugins/forward.js

Bootstrap Italia è un tema Bootstrap 5 per la creazione di applicazioni web nel pieno rispetto delle linee guida di design per i siti internet e i servizi digitali della PA

/**
 * --------------------------------------------------------------------------
 * Bootstrap Italia (https://italia.github.io/bootstrap-italia/)
 * Authors: https://github.com/italia/bootstrap-italia/blob/main/AUTHORS
 * Licensed under BSD-3-Clause license (https://github.com/italia/bootstrap-italia/blob/main/LICENSE)
 * --------------------------------------------------------------------------
 */

import BaseComponent from './base-component.js'

import EventHandler from './dom/event-handler'
import Manipulator from './dom/manipulator'
import { getElementFromSelector } from './util/index'

import { documentScrollTo } from './util/tween'

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

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

const SELECTOR_TOGGLE = '[data-bs-toggle="forward"]'

const Default = {
  duration: 800,
  easing: 'easeInOutSine',
}

class Forward extends BaseComponent {
  constructor(element, config) {
    super(element)

    this._config = this._getConfig(config)

    this._bindEvents()
  }

  // Getters

  static get NAME() {
    return NAME
  }

  // Public
  goToTarget() {
    const target = getElementFromSelector(this._element)
    if (target) {
      documentScrollTo(target.offsetTop, {
        duration: this._config.duration,
        easing: this._config.easing,
      })
    }
  }

  // Private
  _getConfig(config) {
    config = {
      ...Default,
      ...Manipulator.getDataAttributes(this._element),
      ...(typeof config === 'object' ? config : {}),
    }
    return config
  }

  _bindEvents() {
    EventHandler.on(this._element, EVENT_CLICK, (evt) => {
      evt.preventDefault()
      this.goToTarget()
    })
  }
}

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

if (typeof window !== 'undefined' && typeof document !== 'undefined') {
  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_TOGGLE, function (evt) {
    evt.preventDefault()
    const forward = Forward.getOrCreateInstance(this)
    forward.goToTarget()
  })
}

export default Forward