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stay safe with constants in IE8- (#1547)

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- `undefined` etc. can be redefined at top-level for IE8-, so disable related optimisations
- fixed `--support-ie8` catch mangle bug
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Alex Lam S.L
2017-03-05 12:51:11 +08:00
committed by GitHub
parent eb98a7f2f3
commit 1f0333e9f1
5 changed files with 52 additions and 20 deletions
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bin/uglifyjs
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@@ -26,7 +26,7 @@ mangling you need to use `-c` and `-m`.\
.describe("source-map-include-sources", "Pass this flag if you want to include the content of source files in the source map as sourcesContent property.")
.describe("in-source-map", "Input source map, useful if you're compressing JS that was generated from some other original code.")
.describe("screw-ie8", "Do not support Internet Explorer 6/7/8. This flag is enabled by default.")
.describe("support-ie8", "Support non-standard Internet Explorer 6/7/8 javascript. Note: may generate incorrect code for try/catch in ES5 compliant browsers.")
.describe("support-ie8", "Support non-standard Internet Explorer 6/7/8 javascript.")
.describe("expr", "Parse a single expression, rather than a program (for parsing JSON)")
.describe("p", "Skip prefix for original filenames that appear in source maps. \
For example -p 3 will drop 3 directories from file names and ensure they are relative paths. \