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Avoid minifier tricks for boolean literals in expressions.

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Former-commit-id: a02445f97a81c330018247140784818be830595f
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John-David Dalton
2013-05-27 13:04:26 -07:00
parent fe00c628f4
commit 507f2ec544
4 changed files with 31 additions and 18 deletions
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13
build/post-compile.js
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@@ -37,6 +37,19 @@
'\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000"'
);
// replace vars for `false` and `true` with boolean literals
[/(\w+)\s*=\s*!1\b/.exec(source), /(\w+)\s*=\s*!0\b/.exec(source)].forEach(function(varName, index) {
if (varName) {
varName = varName[1];
source = source.replace(RegExp('([!=]==\\s*)' + varName + '|' + varName + '(\\s*[!=]==)', 'g'), '$1' + !!index + '$2');
}
});
// replace `!1` and `!0` in expressions with `false` and `true` values
source = source
.replace(/([!=]==\s*)!1|!1(\s*[!=]==)/g, '$1false$2')
.replace(/([!=]==\s*)!0|!0(\s*[!=]==)/g, '$1true$2');
// flip `typeof` expressions to help optimize Safari and
// correct the AMD module definition for AMD build optimizers
// (e.g. from `"number" == typeof x` to `typeof x == "number")