apeman-brws-history/lib/ap_history.js

/**
 * @class ApHistorys
 */
'use strict'

/** @lends ApHistory */
class ApHistory {
  constructor (conf) {
    const s = this
    Object.assign(s, conf || {})
  }

  /**
   * Push a history.
   * @param {string} url - History url
   */
  push (url) {
    const s = this
    let history = s._getHistory()
    if (!history) {
      ApHistory.warn('`history` not found.')
      return
    }
    history.pushState(null, '', url)
  }

  /**
   * Register pop handler.
   * @param {function} handler
   */
  onPop (handler) {
    const s = this
    let window = s._getWindow()
    if (!window) {
      ApHistory.warn('`window` not found.')
      return
    }
    window.addEventListener('popstate', handler)
  }

  /**
   * Deregister pop handler.
   * @param {function} handler
   */
  offPop (handler) {
    const s = this
    let window = s._getWindow()
    if (!window) {
      ApHistory.warn('`window` not found.')
      return
    }
    window.removeEventListener('popstate', handler)
  }

  _getWindow () {
    const s = this
    return typeof window === 'undefined' ? null : window
  }

  _getHistory () {
    const s = this
    return typeof history === 'undefined' ? null : history
  }
}

Object.assign(ApHistory, {
  /**
   * Print warning.
   * @param {string} msg - Warning message.
   */
  warn (msg) {
    console.log('[ApHistory]', msg)
  }
})

module.exports = ApHistory