Why Does `addEventListener` Throw an Error in MSIE?

MSIE and addEventListener Problem in Javascript

When attempting to utilize the addEventListener method on the document.getElementById('container') element to execute a "beforecopy" function upon content copying on a webpage, users may encounter an "Object doesn't support this property or method" error in Internet Explorer (MSIE).

The issue arises because MSIE requires the use of attachEvent instead of the standard addEventListener method. To resolve this problem, check if the addEventListener method is available and use it if so, otherwise resort to attachEvent:

if (el.addEventListener){
  el.addEventListener('click', modifyText, false); 
} else if (el.attachEvent){
  el.attachEvent('onclick', modifyText);
}

Another approach is to create a function to perform this task:

function bindEvent(el, eventName, eventHandler) {
  if (el.addEventListener){
    el.addEventListener(eventName, eventHandler, false); 
  } else if (el.attachEvent){
    el.attachEvent('on'+eventName, eventHandler);
  }
}

bindEvent(document.getElementById('myElement'), 'click', function () {
  alert('element clicked');
});

The third argument of addEventListener is useCapture, which, when set to true, indicates that event capturing should be initiated.

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