On Thu, Sep 9, 2010 at 6:32 PM, Brendan Eich <bren...@mozilla.com> wrote:
> On Sep 9, 2010, at 1:09 AM, Dmitry Soshnikov wrote: > > > Thus the site's combined file won't be globally strict, however since a > lib is tested before a production release (at least I hope so ;), then the > lib's code should pass the strictness, and therefore, a "use strict" may be > even removed from the lib's file. However, if not to remove, then an empty > statement is enough. > > That does not disable strict mode. Actually it does (since a strict mode, and the directive prologue is an initial statement): "use strict";eval=10 // strict, error but ;"use strict";eval = 10; // non-strict, OK > The problem at real sites including an intel.com property is that > subsequent parts of the concatenation have had strict mode errors. > > The second part of the (combined) file is also evaluated in non-strict, because again, "use strict" is placed not at the initial position. So, the whole file is in non-strict. However, as mentioned Mike Shaver, there can be issues with vice-versa, turning to non-strict, e.g. non-object or even non-undefined /this/ value. So, the suggestion is just a workaround. Dmitry. > > > ;/*1st lib*/"use strict";eval = 10;/*2st lib*/"use > strict";arguments=20;/*our code*/ > > > An example showing the problem would need a "use nonstrict"; directive > after the first part of the concatenation, but there is no such directive. > > /be
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