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(works around a bug in our tree walker which, while cloning nodes, breaks
references between labeled statements and break/continue labels)
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need to check whether the literal has any side effects before replacing that
with `false`.
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do create the sequence even if the stat list is bigger than 2000 statements,
but limit the sequence itself to 2000 expressions.
Ref #414
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It hardly saves any bytes for a sequence so long, and it risks blowing the
stack with the recursive Seq functions.
Ref #414
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Discarding unused function arguments affects function.length, which can lead
to some hard to debug issues. This optimization is now done only in "unsafe
mode".
Fix #121
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(they should be treated as whitespace)
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(they should be treated as whitespace)
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... and support storing there variable names as well, to help with multiple
invocations when mangling toplevel.
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Even if not “defined”, do mangle if name exists in the cache.
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We only touch properties that are present in an object literal, or which are
assigned to. Example:
x = { foo: 1 };
x.bar = 2;
x["baz"] = 3;
x[cond ? "qwe" : "asd"] = 4;
console.log(x.stuff);
The names "foo", "bar", "baz", "qwe" and "asd" will be mangled, and the
resulting mangled names will be used for the same properties throughout the
code. The "stuff" will not be, since it's just referenced but never
assigned to.
This *will* break most of the code out there, but could work on carefully
written code: do not use eval, do not define methods or properties by
walking an array of names, etc. Also, a comprehensive list of exclusions
needs to be passed, to avoid mangling properties that are standard in
JavaScript, DOM, used in external libraries etc.
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It would be nice to have access to the filename of the file that includes the code that causes a JavaScript error. This is especially handy if uglifying multiple files at once.
Only a small change is needed for this to happen as it's already available in the function that throws the error.
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See #637. This does not produce the optimal result, but it does prevent the removal of non-side-effect-free code.
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Because the base reference can be an member expression as well, we have to dig a bit deeper to find the leftmost base reference.
Fixes #451
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`-q 0` (default) use single or double quotes such as to minimize the number of
bytes (prefers double quotes when both will do); this is the previous
behavior.
`-q 1` -- always use single quotes
`-q 2` -- always use double quotes
`-q 3` or just `-q` -- always use the original quotes.
Related codegen option: `quote_style`.
Close #495
Close #460
Some `yargs` guru please tell me why `uglifyjs --help` doesn't display the
help string for `-q` / `--quotes`, and why it doesn't output the expected
argument types anymore, like good old `optimist` did.
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Fixes #583
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The correct format of a sourcemap is acquired
from a mozilla source map generator by calling
toJSON on this object. This patch alters the
toString function on mozilla generators to print
the format that is to spec instead of the generator's
internal representation of itself.
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Give parser more unicode support
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and not equivalent
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Close #611.
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added @ngInject support for inline functions
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Close #588
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Previously it returned the abort node from the alternative branch. This is
not much use as it can be different from the one in the body
branch (i.e. return vs. throw) and can trick us into issues like #591.
Fix #591
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Close #437
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Passing `--keep-fnames` will enable it both for compressor/mangler, so that
function names will not be dropped (when unused) nor mangled.
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See #552. This is mostly useful for having the actual function names in traces.
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* Creates a new SourceMapGenerator based on a SourceMapConsumer:
https://github.com/mozilla/source-map#sourcemapgeneratorfromsourcemapsourcemapconsumer
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`\uFEFF` (ZERO WIDTH NO-BREAK SPACE) is removed when parsing, but was
un-escaped for the output when `ascii_only` was false.
When using
UglifyJS multiple times (creating packages from minified sources, for
example), this would lead to problems because the byte was removed when
parsing for the second time.
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Fix #569
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fix base54
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Fix max_line_len not working for JSON files
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When no arguments are given to `new Function()`, it should be treated as
a regular anonymous function (http://es5.github.io/#x15.3.2.1)
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NaN and Infinity were replaced in the output generation, instead of
during compression. This could lead to results where `1/0` was inserted
without parens leading to invalid output.
The nodes are replaced in the compression step now, and the output
generation returns their regular names. This should not be a problem,
since they're already only constructed from the original name.
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As `maybe_newline()` is only called when `might_need_semicolon` is `true`, the `max_line_len` option has no effect for files without (or with very few) semicolons (like JSON files). A simple for this problem is to use `maybe_newline()` instead of `noop` as the `newline()` function in non-beautify mode.
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Use uglify source map token names if missing
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Close #288
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Close #550
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and condition has no side effects
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