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| author | Alex Lam S.L <alexlamsl@gmail.com> | 2017-03-05 12:51:11 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-03-05 12:51:11 +0800 |
| commit | 1f0333e9f146311e0e412fbd0783c0e1e63c7802 (patch) | |
| tree | 8ad032bf7c16c7c89086331499a1c066407a2374 /lib/compress.js | |
| parent | eb98a7f2f38f5de16b50560199ee7ec719a1e945 (diff) | |
| download | tracifyjs-1f0333e9f146311e0e412fbd0783c0e1e63c7802.tar.gz tracifyjs-1f0333e9f146311e0e412fbd0783c0e1e63c7802.zip | |
stay safe with constants in IE8- (#1547)
- `undefined` etc. can be redefined at top-level for IE8-, so disable related optimisations
- fixed `--support-ie8` catch mangle bug
Diffstat (limited to 'lib/compress.js')
| -rw-r--r-- | lib/compress.js | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js index 7eead2c1..4a5f6395 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -3348,7 +3348,9 @@ merge(Compressor.prototype, { return def; } // testing against !self.scope.uses_with first is an optimization - if (self.undeclared() && !isLHS(self, compressor.parent()) + if (compressor.option("screw_ie8") + && self.undeclared() + && !isLHS(self, compressor.parent()) && (!self.scope.uses_with || !compressor.find_parent(AST_With))) { switch (self.name) { case "undefined": |