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 event through layer: event ABORT No No No Yes Constant value used as bit mask event altKey No Yes No No   event BLUR No No No Yes Constant value used as bit mask event button No Yes No No   event cancelBubble No Yes No No   event CHANGE No No No Yes Constant value used as bit mask event CLICK No No No Yes Constant value used as bit mask event clientX No Yes No No   event clientY No Yes No No   event ctrlKey No Yes No No   event data No No No Yes Requires priviledge settings on Nav 4 event DBLCLICK No No No Yes Constant value used as bit mask event DRAGDROP No No No Yes Constant value used as bit mask event ERROR No No No Yes Constant value used as bit mask event FOCUS No No No Yes Constant value used as bit mask event fromElement No Yes No No   event height No No No Yes   event keyCode No Yes No No   event KEYDOWN No No No Yes Constant value used as bit mask event KEYPRESS No No No Yes Constant value used as bit mask event KEYUP No No No Yes Constant value used as bit mask event layerX No No No Yes   event layerY No No No Yes   event LOAD No No No Yes Constant value used as bit mask event modifiers No No No Yes   event MOUSEDOWN No No No Yes Constant value used as bit mask event MOUSEMOVE No No No Yes Constant value used as bit mask event MOUSEOUT No No No Yes Constant value used as bit mask event MOUSEOVER No No No Yes Constant value used as bit mask event MOUSEUP No No No Yes Constant value used as bit mask event MOVE No No No Yes Constant value used as bit mask event offsetX No Yes No No   event offsetY No Yes No No   event pageX No No No Yes   event pageY No No No Yes   event reason No Yes No No   event RESET No No No Yes Constant value used as bit mask event RESIZE No No No Yes Constant value used as bit mask event returnValue No Yes No No   event screenX No Yes No Yes   event screenY No Yes No Yes   event SELECT No No No Yes Constant value used as bit mask event shiftKey No Yes No No   event srcElement No Yes No No   event srcFilter No Yes No No   event SUBMIT No No No Yes Constant value used as bit mask event target No No No Yes   event toElement No Yes No No   event type No Yes No Yes   event UNLOAD No No No Yes Constant value used as bit mask event which No No No Yes   event width No No No Yes   event x No Yes No Yes   event y No Yes No Yes   fileupload blur() Yes Yes Yes Yes   fileupload defaultValue Yes Yes Yes Yes   fileupload focus() Yes Yes Yes Yes   fileupload form Yes Yes Yes Yes   fileupload name Yes Yes Yes Yes   fileupload onblur Yes Yes Yes Yes   fileupload onchange Yes Yes Yes Yes   fileupload onfocus Yes Yes Yes Yes   fileupload select() Yes Yes Yes Yes   fileupload type No Yes Yes Yes   fileupload value Bugged Yes Yes Yes Read only. Possibly buggy in IE 3 form action Limited Yes Yes Yes Read only in IE 3 form elements[] Yes Yes Yes Yes   form encoding Limited Yes Yes Yes Read only in IE 3 form length Yes Yes Yes Yes   form method Limited Yes Yes Yes Read only in IE 3 form name Yes Yes Yes Yes   form onreset No Yes Yes Yes   form onsubmit Yes Yes Yes Yes   form reset() No Yes Yes Yes   form submit() Yes Yes Yes Yes   form target Limited Yes Yes Yes Read only in IE 3 frame   Yes Yes Yes Yes   hidden form Yes Yes Yes Yes   hidden name Yes Yes Yes Yes   hidden type No Yes Yes Yes   hidden value Bugged Yes Yes Yes Possibly buggy in IE 3 history back() Yes Yes Yes Yes   history current No No No Yes Requires priv settings on Nav 4 history forward() Yes Yes Yes Yes   history go() Limited Yes Yes Yes Enhanced in JS 1.1 history length No Yes Yes Yes   history next No No No Yes Requires priv settings on Nav 4 history previous No No No Yes Requires priv settings on Nav 4 history toString() 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

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