fczbkk

var rootElm = document.getElementById('content');
var paragraphs = rootElm.getElementsByTagName('p');

for (i = 0; i < paragraphs.length; i++) {
  rootElm.removeChild(paragraphs[i]);
}

/*
OTÁZKY
- Čo chcel autor týmto kódom dosiahnuť?

fczbkk

addEvent = (object, event, callback = ->) ->
  if object.addEventListener
    object.addEventListener event, callback, false
  else if object.attachEvent
    object.attachEvent "on#{event}", callback

removeEvent = (object, event, callback = ->) ->
  if object.removeEventListener
    object.removeEventListener event, callback, false
  else if object.detachEvent

fczbkk

function ajax (url, callback) {
  callback = callback || function () {};
  var xhr = new XMLHttpRequest();
  xhr.onreadystatechange = function () {
    if (xhr.readyState == 4) {
      callback(xhr.responseText);
    }
  };
  xhr.open("GET", url, true);
  xhr.send();

fczbkk

/*
Has two optional options parameters:
- length - 8 characters by default
- characters - upper- and lowercase characters and numbers by default
*/

function getRandomString(options, callback) {
  options = options || {};
  options.length = options.length || 8;
  options.characters = options.characters || '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz';

fczbkk

mergeUrlParams = (params = {}) -> ("#{key}=#{val}" for key, val of params).join '&'

fczbkk

unless Array::indexOf
  Array::indexOf = (search_element, from_index) ->
    throw new TypeError '"this" is null or not defined' unless this?
    
    length = @length >>> 0 # Hack to convert object.length to a UInt32
    
    from_index = +from_index or 0
    from_index = 0 if Math.abs(from_index) is Infinity
    if from_index < 0
      from_index += length

fczbkk

simulateClick = (elm) ->
  evt = document.createEvent 'MouseEvents'
  evt.initMouseEvent(
    # type, canBubble, cancelable, view,
    'click', true, true, window
    # detail, screenX, screenY, clientX, clientY,
    0, 0, 0, 0, 0
    # ctrlKey, altKey, shiftKey, metaKey,
    false, false, false, false
    # button, relatedTarget

fczbkk

ajax = (url, callback = ->) ->
  xhr = new XMLHttpRequest()

  xhr.onreadystatechange = ->
    if xhr.readyState is 4
      if xhr.status in [200, 304]
        callback xhr.responseText

  xhr.open 'GET', url, true
  xhr.send()

fczbkk

getClassNameRe = (classname) ->
  ///
    (^|\s)        # beginning of string or whitespace
    #{classname}
    (\s|$)        # end of string or whitespace
  ///

hasClassName = (element, classname) ->
  getClassNameRe(classname).test element.className

fczbkk

isArray = Array.isArray or (obj) -> Object::toString.call obj is '[object Array]'