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Using 'uglify: true' breaks the output for IE 11 #79

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zhaparoff opened this issue Nov 14, 2019 · 0 comments
Open

Using 'uglify: true' breaks the output for IE 11 #79

zhaparoff opened this issue Nov 14, 2019 · 0 comments

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@zhaparoff
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zhaparoff commented Nov 14, 2019 •
edited

When uglify: true, output is transformed in the way, which produces runtime errors in IE 11.

For example, undefined check:

typeof varName1 !== "undefined"

is transformed to:

0 !== varName1

which fails with "Wrong number of arguments or invalid property assignment" error at runtime.

Most likely, related to the mishoo/UglifyJS#2813
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