Final properties and methods?

[VK]

If any way to implement a cross-browser method/property protection in an
object?

Say:

function myObject() {
this.myProperty = "A value that shouldn't be overridden in instances."
}

Mozilla (I believe) still has watch() method, that does the job semi-ok (you
cannot really protect a property, but you can immediately restore its
original value).

IE doesn't have watch() method though.

[Ulrik Skovenborg]

Re: Final properties and methods?

VK wrote:[color=blue]
> Mozilla (I believe) still has watch() method, that does the job semi-ok (you
> cannot really protect a property, but you can immediately restore its
> original value).[/color]

Actually Mozilla also supports constants which might work out better:
const foo = "A value that shouldn't be changed";
Unfortunally Internet Explorer doesn't understand the const keyword
and will therefore make an error.

[Michael Winter]

Re: Final properties and methods?

On Sat, 11 Dec 2004 12:40:59 +0100, Ulrik Skovenborg <"skovenborg at frac
dot dk"> wrote:

[snip]
[color=blue]
> Unfortunally Internet Explorer doesn't understand the const keyword[/color]

Neither does Opera, and I doubt many other browsers (if any) will, either.

To VK: No, you can't mark properties as read-only. You'll either have to
trust client software to respect a "Don't modify this value" notice, or
hide the value internally and use a function. Go with the former, if you
can.

Mike

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Michael Winter
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