thanks, that makes sense. I have tried this too:
with({}){
function isStrict() {"use strict";
return this;
}
alert(isStrict()); // global object
}
still global though, but I believe that a side effect of the with statement.
Weird that expressions behave outside that implicit context.
Libraries wrapped in inline expressions seem to be safe then, hooooray I
guess :-)
On Wed, Jan 30, 2013 at 9:18 AM, Andreas Rossberg <[email protected]>wrote:
> On 30 January 2013 18:00, Andrea Giammarchi <[email protected]>
> wrote:
> > let me rephrase ...
> >
> > putting `with(this){` before any build process/inlined library and `}` at
> > the end of all concatenated files **nothing** is strict anymore ^_^
> >
> > function isStrict() {"use strict";
> > return this;
> > }
> >
> > isStrict(); // undefined
> >
> > now, wraping the whole thing inside a with statement
> >
> > with(this){
> > function isStrict() {"use strict";
> > return this;
> > }
> > alert(isStrict()); // global object
> > }
> >
> > forget the Function hack, there is no library able to ensure itself to be
> > executed in strict mode.
> > Using the width statement around any code makes it not strict.
>
> That is, er, balls, of course. All that happens here is that inside
> the 'with', a call to a _toplevel_ function like 'isStrict()' becomes
> 'this.isStrict()', and so receives the global object. That does not
> otherwise change strictness, however. Try:
>
> with(this) {
> function isStrict() { "use strict"; var x; delete x; }
> alert(isStrict());
> }
>
> for example. Moreover, calls to functions not resolving to global
> definitions are completely unaffected, so are calls using 'call' or
> 'apply':
>
> with(this) {
> function isStrict() { "use strict"; return this; };
> function call(f) { f() };
> alert(call(isStrict)); // undefined
> alert(isStrict.call()); // undefined
> }
>
> Both calls would return window in sloppy mode.
>
> /Andreas
>
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
