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Filename : index.js
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/* eslint-disable prefer-spread */
/*!
 * jQuery Tiny Pub/Sub - v0.6 - 1/10/2011
 * http://benalman.com/
 *
 * Copyright (c) 2010 "Cowboy" Ben Alman
 * Dual licensed under the MIT and GPL licenses.
 * http://benalman.com/about/license/
 */

import $ from 'jquery'

// Create a "dummy" jQuery object on which to bind, unbind and trigger event
// handlers. Note that $({}) works in jQuery 1.4.3+.
const o = $({})

// Subscribe to a topic. Works just like bind, except the passed handler
// is wrapped in a function so that the event object can be stripped out.
// Even though the event object might be useful, it is unnecessary and
// will only complicate things in the future should the user decide to move
// to a non-$.event-based pub/sub implementation.
export function subscribe(topic, fn) {
  if ($.isPlainObject(topic)) {
    return $.each(topic, function (topic, fn) {
      subscribe(topic, fn)
    })
  }
  // Call fn, stripping out the 1st argument (the event object).
  function wrapper() {
    return fn.apply(this, Array.prototype.slice.call(arguments, 1))
  }

  // Add .guid property to function to allow it to be easily unbound. Note
  // that $.guid is new in jQuery 1.4+, and $.event.guid was used before.
  wrapper.guid = fn.guid = fn.guid || $.guid++

  // Bind the handler.
  o.bind(topic, wrapper)
}
$.subscribe = subscribe

// Unsubscribe from a topic. Works exactly like unbind.
export function unsubscribe() {
  o.unbind.apply(o, arguments)
}
$.unsubscribe = unsubscribe

// Publish a topic. Works exactly like trigger.
export function publish() {
  o.trigger.apply(o, arguments)
}
$.publish = publish