Dispatch window load event

I开发者_StackOverflow社区 need to dispatch the window's load event in Javascript. There is plenty of documentation on how to dispatch mouse events, But I can't find any on load events. It only needs to work in Firefox. It would be equally helpful if I could "spy" on the window's load event, because then I could just call the function. Using the "Event spy" addon isn't working because it requires me to open the dom inspector, which i can't do until after the page is finished loading.

I'm making a grease monkey script. So I don't know which function it is that I'm trying to invoke.

var load_event = document.createEvent('Event');  
load_event.initEvent('load', false, false);  
window.dispatchEvent(load_event);

works fine in my environment.

HTML events are fired differently than mouse events. Here is how to fire a load event:

var load_event = document.createEvent("HTMLEvents");
load_event.initEvent("load", true, true);
window.dispatchEvent(load_event);

References

• UIEvents: initEvent

• DOM Features

Update for 2021 year

var load_event = new Event("load"); 
window.dispatchEvent(load_event);

Event