4 examples of 'to add multiple event to a element use' in JavaScript

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eventElement(element) {
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  let ee = this.eventElements.filter(ee => ee.element === element)[0];
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  if (!ee) {
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    ee = new EventElement(element);
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    this.eventElements.push(ee);
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  }
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  return ee;
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}

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function _add (element, event) {
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  var events = event.split(' ');
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  // is this valid to add this element? e.g. you can't have `blahblah` as event name
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  var valid = true;
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  for (var i = 0; i < events.length; i++) {
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    var ex = events[i];
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    if (_options.events.indexOf(ex) == -1) {
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      valid = false;
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      break;
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    }
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  }
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  if (valid) {
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    _elements.push({
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      element: element,
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      event: event
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    });
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  } else {
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    _error('Invalid event name: `' + event + '`. Skipping ' + element);
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  }
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};

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listenToucheableEvent (): void {
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  this._eachItems(item => {
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    item.addEventListener('focusout', this._vm.willUpdateTouched)
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  })
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}

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CssAnimator.prototype.addMultipleEventListener = function addMultipleEventListener(el, s, fn) {
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  var evts = s.split(' '),
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      i,
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      ii;
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  for (i = 0, ii = evts.length; i < ii; ++i) {
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    el.addEventListener(evts[i], fn, false);
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  }
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};