Browser Compatibility
As noted earlier, varying levels of JavaScript support have been built into browsers since Netscape 2.0. The following table, by Nick Heinle, shows which browsers support which JavaScript objects. For an online version of the table, see http://webcoder.com/reference/2/index.html.
|
JavaScript Features |
Nav 2 |
Nav 3 |
Nav 4 |
IE 3 |
IE 4 |
|---|---|---|---|---|---|
|
Applets |
No |
Yes |
Yes |
Yes[a] |
Yes[a] |
|
Areas |
No |
Yes |
Yes |
No |
Yes |
|
Array |
No |
Yes |
Yes |
Yes |
Yes |
|
CSS |
No |
No |
Yes[b] |
No |
Yes |
|
Cookie |
Yes |
Yes |
Yes |
Yes[c] |
Yes |
|
Date |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Event |
No |
No |
Yes[d] |
No |
Yes[d] |
|
External scripts |
No |
Yes |
Yes |
No[e] |
Yes |
|
Forms |
Yes[f] |
Yes |
Yes |
Yes | |
|
Frames |
Yes |
Yes |
Yes |
Yes |
Yes |
|
History |
Yes |
Yes |
Yes |
Yes[c] |
Yes |
|
Images |
No |
Yes |
Yes |
No[g] |
Yes |
|
JavaEnabled |
No |
Yes |
Yes |
No |
Yes |
|
Links |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Location |
Yes[h] |
Yes |
Yes |
Yes | |
|
Math |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Navigator |
Yes |
Yes |
Yes |
Yes |
Yes |
|
MimeTypes |
No |
Yes |
Yes |
No |
No |
|
Options |
No |
Yes |
Yes |
No |
No |
|
String |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Window |
Yes[j] |
Yes |
Yes[j] | ||
|
Write |
Yes[c] |
Yes[c] |
Yes |
Yes |
Yes |
[a] Allows access to ActiveX too, but no Java API calls. [b] Navigator only allows predisplay control, except with positioning. [c] Implementation is buggy or incomplete: see the bugs table at http://webcoder.com/reference/2/index.html. [d] The event model is improved, but it’s different in IE and Navigator. [e] External scripts are supported ... | |||||
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