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Wait For Elements

given a selector waits for elements to be inserted into the DOM and executes a callback for each match

Verzia zo dňa 18.12.2014. Pozri najnovšiu verziu.

Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @require https://update.greasyfork.org/scripts/5679/28653/Wait%20For%20Elements.js 

/**
* @param sel - the selector you want to wait for
* @param action - the callback that will be executed when element/s matching the given selector are found, it is passed the array of found elements
* @param stopLooking - if true the function will stop looking for more elements after the first match
*/
function waitForElems(sel, action, stopLooking) {
  var id = 'fke' + Math.floor(Math.random() * 12345);
  function findElem(sel) {
    var found = [].filter.call(document.querySelectorAll(sel), function(elem) {
      return elem.dataset[id] !== 'y';
    });
    if(found.length > 0) {
      found.forEach(function(elem) {
        elem.dataset[id] = 'y';
        action(elem);
      });
      if(stopLooking) {
        clearInterval(tick);
      }
    }
  }
  var tick = setInterval(findElem.bind(null, sel), 300);
  findElem(sel);
  return tick;
}
/**
* @param regex - should match the site you're waiting for
* @param action - the callback that will be executed when a matching url is visited
* @param stopLooking - if true the function will stop waiting for another url match after the first match
*/
function waitForUrl(regex, action, stopLooking) {
  function checkUrl(regex) {
    var url = window.location.href;
    if(url !== lastUrl && regex.test(url)) {
      action();
    }
    if(stopLooking) {
      clearInterval(tick);
    }
    lastUrl = url;
  }
  var tick = setInterval(checkUrl.bind(null, regex), 300),
      lastUrl;
  checkUrl(regex);
  return tick;
}