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| author | Alex Lam S.L <alexlamsl@gmail.com> | 2018-02-01 19:15:17 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-02-01 19:15:17 +0800 |
| commit | c3a002ff9739b60ec1836719c1e240df22a67830 (patch) | |
| tree | 181897bab1377b136aef85dca74f7439d18f06e4 /lib/compress.js | |
| parent | fad6766a905350574b698af707958294e22184f3 (diff) | |
| download | tracifyjs-c3a002ff9739b60ec1836719c1e240df22a67830.tar.gz tracifyjs-c3a002ff9739b60ec1836719c1e240df22a67830.zip | |
account for side-effects in `comparisons` of `null` & `undefined` (#2863)
Diffstat (limited to 'lib/compress.js')
| -rw-r--r-- | lib/compress.js | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/compress.js b/lib/compress.js index a88ea2c4..1b0aa15a 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -4800,6 +4800,7 @@ merge(Compressor.prototype, { && lhs.operator == self.right.operator && (is_undefined(lhs.left, compressor) && self.right.left instanceof AST_Null || lhs.left instanceof AST_Null && is_undefined(self.right.left, compressor)) + && !lhs.right.has_side_effects(compressor) && lhs.right.equivalent_to(self.right.right)) { var combined = make_node(AST_Binary, self, { operator: lhs.operator.slice(0, -1), |