Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

After accessing Image.complete, Image.onload does not fire.

  • 3 பதிலளிப்புகள்
  • 3 இந்த பிரச்னைகள் உள்ளது
  • 9 views
  • Last reply by knorretje

JavaScript code that works under IE-9 and Chrome-16, but not under Firefox-9.0.1:

var slides = []; slides[0] = new Image(); slides[0].src = fileNames[0];

var tmp = slides[0].complete;

  slides[0].onerror = function(){
                         alert("While downloading\n"+
                                "           " +fileNames[0]+
                                "\nerror occurred. Execution stops");
                         throw new Error("Network problem");
                      };
  alert("X " + tmp);
  alert("Y ");
  slides[0].onload  = function(){
                        alert(this.complete);
                         if (winStarted) winStart()
                         else window.onload = winStart;
                     };

The alerts "X" and "Y" give output, but the onload branch is not taken. Onload branch is taken under IE-9 and Chrome 16.0.912.63.

JavaScript code that works under IE-9 and Chrome-16, but not under Firefox-9.0.1: var slides = []; slides[0] = new Image(); slides[0].src = fileNames[0]; var tmp = slides[0].complete; slides[0].onerror = function(){ alert("While downloading\n"+ " " +fileNames[0]+ "\nerror occurred. Execution stops"); throw new Error("Network problem"); }; alert("X " + tmp); alert("Y "); slides[0].onload = function(){ alert(this.complete); if (winStarted) winStart() else window.onload = winStart; }; The alerts "X" and "Y" give output, but the onload branch is not taken. Onload branch is taken under IE-9 and Chrome 16.0.912.63.

Paul.Wormer மூலமாக திருத்தப்பட்டது

All Replies (3)

Could you create a working testcase on http://jsfiddle.net/ (save and post the link here), please.

http://jsfiddle.net/paulwormer/wXN9p/

This fiddle alerts: FF-9 "Complete branch; Chrome-16 "Complete branch" + "Onload branch" ; IE-9 "Onload branch".

There seems to be an onload for XUL images, but I can not find it for html images.
https://developer.mozilla.org/en/DOM/HTMLImageElement
https://developer.mozilla.org/en/DOM/element
https://developer.mozilla.org/en/XUL/image
Maybe you can use element.addEventListener instead. Something like:
s.myonload = function ....
s.addEventListener("load",s.myonload,false);
s.src = ...

https://developer.mozilla.org/en/DOM/element.addEventListener