JavaScript event window.onload not triggered

问题

I've got the following code in a website:

 window.onload = resize;
 window.onresize = resize;

 function resize(){
  heightWithoutHeader = (window.innerHeight - 85) + "px"; 
  document.getElementById("main-table").style.height = heightWithoutHeader;
  document.getElementById("navigation").style.height = heightWithoutHeader;
 }

The onresize works fine, but the onload event never fires. I've tried it in Firefox and Chrome and neither of them works.

Thank you for your help and go for the reputation! ;D

回答1:

I think what's probably happening here is that your window.onload is being overridden later, check to make sure that it's not via things like <body onload="">

You can check this by alert(window.onload) in your re-size function, to see what's actually attached there.

回答2:

I had this happen when I added 3rd party jQuery code we needed for a partner. I could have easily converted my antiquated window.onload to a jQuery document ready. That said, I wanted to know if there is a modern day, cross browser compatible solution.

There IS!

window.addEventListener ? 
window.addEventListener("load",yourFunction,false) : 
window.attachEvent && window.attachEvent("onload",yourFunction);

Now that I know ... I can convert my code to use the jQuery route. And, I will ask our partner to refactor their code so they stop affecting sites.

Source where I found the fix --> http://ckon.wordpress.com/2008/07/25/stop-using-windowonload-in-javascript/

回答3:

Move the window.onload line to the end of the javascript file or after the initial function and it will work:

function resize(){
    heightWithoutHeader = (window.innerHeight - 85) + "px"; 
    document.getElementById("main-table").style.height = heightWithoutHeader;
    document.getElementById("navigation").style.height = heightWithoutHeader;
}
// ...
// at the end of the file...
window.onload = resize;
window.onresize = resize;

But it's a best practice if you don't replace the onload too. Instead attach your function to the onload event:

function resize(){
    heightWithoutHeader = (window.innerHeight - 85) + "px"; 
    document.getElementById("main-table").style.height = heightWithoutHeader;
    document.getElementById("navigation").style.height = heightWithoutHeader;
}
// ...
// at the end of the file...
window.addEventListener ? 
    window.addEventListener("load",resize,false) 
    : 
    window.attachEvent && window.attachEvent("onload",resize);

That worked for me and sorry for my english.

回答4:

This works for me, i think your problem is somewhere else:

 function resize(){
  var tester = document.getElementById("tester"),
      html = tester.innerHTML

  tester.innerHTML = html + "resize <br />"
 }  

window.onload = resize;
window.onresize = resize;

you can test it yourself here: http://jsfiddle.net/Dzpeg/2/

are you sure its the only event called onLoad ? Maybe an other onLoad event creates a conflict

回答5:

For me, window.onload was not working when wrote inside script type="text/javascript tag.

Instead, needed to write the same in script language="Javascript" type="text/javascript tag and it worked fine.

回答6:

This will be work when you call the "window.onload" next to the function resize()

回答7:

If it's really in that order, it's definitely not going to work. You can't assign a function to an event handler before the function itself is declared.

来源：https://stackoverflow.com/questions/2810825/javascript-event-window-onload-not-triggered

标签

javascript

onload

onload-event