What works in which browser and what doesn't.

by Ciff Wootton

Here's a list of the percentage of JavaScript features that work in each of the popular browsers. Sadly, it looks like only about 31% of the features work with both 3.0 and above browsers. I know site developers who have decided to simply not use JavaScript at all rather than mess with the compatibility issues.
August 26, 1998

IE 3 & 4	243	31.68%
Nav 3 & 4	373	48.63%
IE4 & NAV 4	425	55.41%
All 4 browsers	240	31.29%

A further caveat: This suggests areas that you should check rather than just go on my say so. Some features could get implemented at intermediate releases such as 4.04 where they weren't available at 4.03 or might be available only on certain platforms. So we are simplifying things a little when we talk about Nav 3 vs. Nav 4.

There is a Web Standards pressure group that is trying to get some groundswell of public opinion going to make Microsoft and Netscape toe the line and at least support the W3C and other published standards. They are at http://www.webstandards.org/ and are called 'The Web Standards Project'.

Here's the whole, frightening list window through window:

window	alert()	Yes	Yes	Yes	Yes
window	atob()	No	No	No	Yes
window	back()	No	No	No	Yes
window	blur()	No	Yes	Yes	Yes
window	btoa()	No	No	No	Yes
window	captureEvents()	No	No	No	Yes
window	clearInterval()	No	Yes	No	Yes
window	clearTimeout()	Yes	Yes	Yes	Yes
window	clientInformation	No	Yes	No	No
window	close()	Yes	Yes	Yes	Yes
window	closed	No	Yes	Yes	Yes
window	confirm()	Yes	Yes	Yes	Yes
window	crypto	No	No	No	Yes	Available in Nav 4.04 onwards
window	defaultStatus	Yes	Yes	Yes	Yes
window	disableExternalCapture()	No	No	No	Yes	Requires priv settings on Nav 4
window	document	Yes	Yes	Yes	Yes
window	enableExternalCapture()	No	No	No	Yes	Requires priv settings on Nav 4
window	event	No	Yes	No	No
window	find()	No	No	No	Yes
window	focus()	No	Yes	Yes	Yes
window	forward()	No	No	No	Yes
window	frames[]	Yes	Yes	Yes	Yes
window	handleEvent()	No	No	No	Yes
window	history	Yes	Yes	Yes	Yes
window	home()	No	No	No	Yes
window	innerHeight	No	No	No	Yes
window	innerWidth	No	No	No	Yes
window	java	No	No	Yes	Yes
window	length	Yes	Yes	Yes	Yes
window	location	Yes	Yes	Yes	Yes
window	locationbar	No	No	No	Yes	Requires priv settings on Nav 4
window	Math	Yes	Yes	Yes	Yes
window	menubar	No	No	No	Yes	Requires priv setting on Nav 4
window	moveBy()	No	Yes	No	Yes	Requires priv setting on Nav 4
window	moveTo()	No	Yes	No	Yes	Requires priv setting on Nav 4
window	name	Limited	Yes	Yes	Yes	Read write in JS 1.1
window	navigate()	Yes	Yes	No	No
window	navigator	Yes	Yes	Yes	Yes	See navigator object for details
window	netscape	No	No	Yes	Yes
window	offscreenBuffering	No	Yes	No	Yes
window	onblur	No	Yes	Yes	Yes
window	ondragdrop	No	No	No	Yes
window	onerror	No	Yes	Yes	Yes
window	onfocus	No	Yes	Yes	Yes
window	onload	Yes	Yes	Yes	Yes
window	onmove	No	No	No	Yes	Not supported on UNIX platforms
window	onresize	No	Yes	No	Yes
window	onunload	Yes	Yes	Yes	Yes
window	open()	Limited	Yes	Yes	Yes	Enhanced in JS 1.1
window	opener	No	Yes	Yes	Yes
window	outerHeight	No	No	No	Yes	Requires priv setting on Nav 4
window	outerWidth	No	No	No	Yes	Requires priv setting on Nav 4
window	Packages	No	No	Yes	Yes
window	pageXOffset	No	No	No	Yes
window	pageYOffset	No	No	No	Yes
window	parent	Yes	Yes	Yes	Yes
window	personalBar	No	No	No	Yes	Requires priv setting on Nav 4
window	print()	No	No	No	Yes
window	prompt()	Yes	Yes	Yes	Yes
window	releaseEvents()	No	No	No	Yes
window	resizeBy()	No	Yes	No	Yes	Requires priv setting on Nav 4
window	resizeTo()	No	Yes	No	Yes	Requires priv setting on Nav 4
window	routeEvent(	No	No	No	Yes
window	screen	No	Yes	No	Yes
window	screenX	No	No	No	Yes
window	screenY	No	No	No	Yes
window	scroll()	No	Yes	Yes	Yes
window	scrollbars	No	No	No	Yes	Requires priv setting on Nav 4
window	scrollBy()	No	Yes	No	Yes
window	scrollTo()	No	Yes	No	Yes
window	self	Yes	Yes	Yes	Yes
window	setHotKeys()	No	No	No	Yes	Requires priv setting on Nav 4
window	setInterval()	No	Bugged	No	Yes	Buggy in IE 4
window	setResizable()	No	No	No	Yes	Requires priv setting on Nav 4
window	setTimeout()	Yes	Yes	Yes	Yes	Leaks memory on Nav 2
window	setZOptions()	No	No	No	Yes	Requires priv setting on Nav 4
window	status	Yes	Yes	Yes	Yes
window	statusbar	No	No	No	Yes	Requires priv setting on Nav 4
window	stop()	No	No	No	Yes
window	sun	No	No	Yes	Yes
window	toolbar	No	No	No	Yes	Requires priv setting on Nav 4
window	top	Yes	Yes	Yes	Yes
window	window	Yes	Yes	Yes	Yes

This is a prety long list so we have split it up over several pages. They are still a bit slow to load due to their size.

A - event
event - layer
layer - screen
screen - window
window - window