On Tue, Mar 13, 2012 at 9:47 AM, Kevin Smith <[email protected]> wrote: > Hi John, > >> (function() { >> var self = this; >> (function() { console.log(self); }); >> }); > > 1. As stated above, it's assumed that BTFs will be preferred for clarity or > brevity gains, even if bound-this is not required. "Opting out" of BTFs is > no different than using classic functions, so I can't see that there is any > cost involved.
The cost comes from using BTF in cases where it will give erroneous results. If BTF exists, the next generation of JS developers will 'never' use grand-dad's function syntax. They will consider that form obscure and confusing. They won't recognize the cases where the old form is needed. So they will pay a cost to opt out of BTF. If any! All (non-member) function expressions are either: 1. OO and want lexical 'this', 2. functional and don't care about 'this', 3. Want default 'this' My claim is that category 1 > category 2 >>> category 3. Only category 3 incurs this cost I outline. jjb > > kevin _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
