AddLoadEvent does not help in onload conflict

Question

I use the popular addLoadEvent as follows for all my JS downloads:

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent( locationToggle );
addLoadEvent( step1 );
addLoadEvent( step2 );
addLoadEvent( step3 );
addLoadEvent( getCounties );
addLoadEvent( mapSelection);

All that I read suggests that this is a pretty bullet-free way to avoid onload conflicts. Nevertheless, this method does not work better than wrapping functions in the anonymous window.onload function. Both methods cause identical onload conflicts with this feature set.

I load these functions from the same file as the addLoadEvent function itself. I also use calender.js, which is a third-party file that uses mootools 1.2.4 in an additional file. My files do not have Javascript.

Firstly, someone can verify that I have not damaged the code, and I am using it correctly. Secondly, can someone suggest why this does not resolve conflicts?

Javascript.

Answer 1

. , DOM 0 , .

W3C addEventListener IE attachEvent, , , .

// window.onload W3C cross-browser with a fallback
function addLoadEvent(func) {
  if (window.addEventListener)
    window.addEventListener("load", func, false);
  else if (window.attachEvent)
    window.attachEvent("onload", func);
  else { // fallback
    var old = window.onload;
    window.onload = function() {
      if (old) old();
      func();
    };
  }
}

, IE , ( ).

, , , , , window.onload.

nice script, .

: document.ready (DOMContentLoaded)

// document.ready
function addLoadEvent(func) {
  if (typeof func == "function") {
    addLoadEvent.queue.push(func);
  }
}
addLoadEvent.queue = [];

//////////////////////////////////////////////////////////////////////////////

// Dean Edwards/Matthias Miller/John Resig

function init() {
  // quit if this function has already been called
  if (arguments.callee.done) return;

  // flag this function so we don't do the same thing twice
  arguments.callee.done = true;

  // kill the timer
  if (_timer) clearInterval(_timer);

  // do stuff: execute the queue
  var que = addLoadEvent.queue;
  var len = que.length;
  for(var i = 0; i < len; i++) {
    if (typeof que[i] == "function") {
      que[i]();
    }
  }
};

/* for Mozilla/Opera9 */
if (document.addEventListener) {
  document.addEventListener("DOMContentLoaded", init, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
  document.write("<script id=__ie_onload defer src=javascript:void(0)>"
                +"<\/script>");
  var script = document.getElementById("__ie_onload");
  script.onreadystatechange = function() {
    if (this.readyState == "complete") {
      init(); // call the onload handler
    }
  };
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
  var _timer = setInterval(function() {
    if (/loaded|complete/.test(document.readyState)) {
      init(); // call the onload handler
    }
  }, 10);
}

/* for other browsers */
window.onload = init;

: , .