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Basic Usage:
--compilation_level (-O) VAL : Specifies the compilation level to
SIMPLE (default), ADVANCED (default:
--env [BROWSER | CUSTOM] : Determines the set of builtin externs
to load. Options: BROWSER, CUSTOM.
Defaults to BROWSER. (default:
--externs VAL : The file containing JavaScript
externs. You may specify multiple
--js VAL : The JavaScript filename. You may
specify multiple. The flag name is
optional, because args are
interpreted as files by default. You
may also use minimatch-style glob
patterns. For example, use
--js='**.js' --js='!**_test.js' to
recursively include all js files that
do not end in _test.js
--js_output_file VAL : Primary output filename. If not
specified, output is written to
stdout (default: )
--language_in VAL : Sets the language spec to which input
sources should conform. Options:
(experimental), ECMASCRIPT_2015,
--language_out VAL : Sets the language spec to which
output should conform. Options:
(experimental), ECMASCRIPT_2015,
(default: ECMASCRIPT5)
--warning_level (-W) [QUIET | DEFAULT : Specifies the warning level to use.
(default: DEFAULT)
Warning and Error Management:
--conformance_configs VAL : A list of JS Conformance
configurations in text protocol
buffer format.
--extra_annotation_name VAL : A whitelist of tag names in JSDoc.
You may specify multiple
--hide_warnings_for VAL : If specified, files whose path
contains this string will have their
warnings hidden. You may specify
--jscomp_error VAL : Make the named class of warnings an
error. Must be one of the error group
items. '*' adds all supported.
--jscomp_off VAL : Turn off the named class of warnings.
Must be one of the error group items.
'*' adds all supported.
--jscomp_warning VAL : Make the named class of warnings a
normal warning. Must be one of the
error group items. '*' adds all
--new_type_inf : Checks for type errors using the new
type inference algorithm. (default:
--strict_mode_input : Assume input sources are to run in
strict mode. (default: true)
--warnings_whitelist_file VAL : A file containing warnings to
suppress. Each line should be of the
<warning-description> (default: )
Available Error Groups: accessControls, ambiguousFunctionDecl,
checkRegExp, checkTypes, checkVars, conformanceViolations, const,
constantProperty, deprecated, deprecatedAnnotations, duplicateMessage, es3,
es5Strict, externsValidation, fileoverviewTags, functionParams, globalThis,
internetExplorerChecks, invalidCasts, misplacedTypeAnnotation,
missingGetCssName, missingOverride, missingPolyfill, missingProperties,
missingProvide, missingRequire, missingReturn, moduleLoad, msgDescriptions,
newCheckTypes, nonStandardJsDocs, missingSourcesWarnings,
reportUnknownTypes, suspiciousCode, strictModuleDepCheck, typeInvalidation,
undefinedNames, undefinedVars, unknownDefines, unusedLocalVariables,
unusedPrivateMembers, uselessCode, useOfGoogBase, underscore, visibility
--assume_function_wrapper : Enable additional optimizations based
on the assumption that the output
will be wrapped with a function
wrapper. This flag is used to
indicate that "global" declarations
will not actually be global but
instead isolated to the compilation
unit. This enables additional
optimizations. (default: false)
--export_local_property_definitions : Generates export code for local
properties marked with @export
(default: false)
--formatting [PRETTY_PRINT | : Specifies which formatting options,
PRINT_INPUT_DELIMITER | SINGLE_QUOTES] if any, should be applied to the
output JS. Options: PRETTY_PRINT,
--generate_exports : Generates export code for those
marked with @export (default: false)
--isolation_mode [NONE | IIFE] : If set to IIFE the compiler output
will follow the form:
Options: NONE, IIFE (default: NONE)
--output_wrapper VAL : Interpolate output into this string
at the place denoted by the marker
token %output%. Use marker token
%output|jsstring% to do js string
escaping on the output. Consider
using the --isolation_mode flag
instead. (default: )
--output_wrapper_file VAL : Loads the specified file and passes
the file contents to the
--output_wrapper flag, replacing the
value if it exists. This is useful if
you want special characters like
newline in the wrapper. (default: )
Dependency Management:
--dependency_mode [NONE | LOOSE | : Specifies how the compiler should
STRICT] determine the set and order of files
for a compilation. Options: NONE the
compiler will include all src files
in the order listed, STRICT files
will be included and sorted by
starting from namespaces or files
listed by the --entry_point flag -
files will only be included if they
are referenced by a goog.require or
CommonJS require or ES6 import, LOOSE
same as with STRICT but files which
do not goog.provide a namespace and
are not modules will be automatically
added as --entry_point entries.
Defaults to NONE. (default: NONE)
--entry_point VAL : A file or namespace to use as the
starting point for determining which
src files to include in the
compilation. ES6 and CommonJS modules
are specified as file paths (without
the extension). Closure-library
namespaces are specified with a
"goog:" prefix. Example:
JS Modules:
--js_module_root VAL : Path prefixes to be removed from ES6
& CommonJS modules.
--module_resolution [BROWSER | NODE] : Specifies how the compiler locates
modules. BROWSER requires all module
imports to begin with a '.' or '/'
and have a file extension. NODE uses
the node module rules. (default:
--package_json_entry_names VAL : Ordered list of entries to look for
in package.json files when processing
modules with the NODE module
resolution strategy (i.e.
esnext:main,browser,main). Defaults
to a list with the following entries:
"browser", "module", "main".
--process_common_js_modules : Process CommonJS modules to a
concatenable form. (default: false)
Library and Framework Specific:
--angular_pass : Generate $inject properties for
AngularJS for functions annotated
with @ngInject (default: false)
--dart_pass : Rewrite Dart Dev Compiler output to
be compiler-friendly. (default: false)
--force_inject_library VAL : Force injection of named runtime
libraries. The format is <name> where
<name> is the name of a runtime
library. Possible libraries include:
base, es6_runtime, runtime_type_check
--inject_libraries : Allow injecting runtime libraries.
(default: true)
--polymer_pass : Equivalent to --polymer_version=1
(default: false)
--process_closure_primitives : Processes built-ins from the Closure
library, such as goog.require(),
goog.provide(), and goog.exportSymbol(
). True by default. (default: true)
--rewrite_polyfills : Rewrite ES6 library calls to use
polyfills provided by the compiler's
runtime. (default: true)
Code Splitting:
--module VAL : A JavaScript module specification.
The format is <name>:<num-js-files>[:[
<dep>,...][:]]]. Module names must be
unique. Each dep is the name of a
module that this module depends on.
Modules must be listed in dependency
order, and JS source files must be
listed in the corresponding order.
Where --module flags occur in
relation to --js flags is
unimportant. <num-js-files> may be
set to 'auto' for the first module if
it has no dependencies. Provide the
value 'auto' to trigger module
creation from CommonJSmodules.
--module_output_path_prefix VAL : Prefix for filenames of compiled JS
modules. <module-name>.js will be
appended to this prefix. Directories
will be created as needed. Use with
--module (default: ./)
--module_wrapper VAL : An output wrapper for a JavaScript
module (optional). The format is
<name>:<wrapper>. The module name
must correspond with a module
specified using --module. The wrapper
must contain %s as the code
placeholder. Alternately, %output%
can be used in place of %s. %n% can
be used to represent a newline. The
%basename% placeholder can also be
used to substitute the base name of
the module output file.
--create_source_map VAL : If specified, a source map file
mapping the generated source files
back to the original source file will
be output to the specified path. The
%outname% placeholder will expand to
the name of the output file that the
source map corresponds to. (default: )
--output_manifest VAL : Prints out a list of all the files in
the compilation. If --dependency_mode=
STRICT or LOOSE is specified, this
will not include files that got
dropped because they were not
required. The %outname% placeholder
expands to the JS output file. If
you're using modularization, using
%outname% will create a manifest for
each module. (default: )
--output_module_dependencies VAL : Prints out a JSON file of
dependencies between modules.
(default: )
--property_renaming_report VAL : File where the serialized version of
the property renaming map produced
should be saved (default: )
--source_map_include_content : Includes sources content into source
map. Greatly increases the size of
source maps but offers greater
portability (default: false)
--source_map_input VAL : Source map locations for input files,
separated by a '|', (i.e.
--source_map_location_mapping VAL : Source map location mapping separated
by a '|' (i.e. filesystem-path|webserv
--variable_renaming_report VAL : File where the serialized version of
the variable renaming map produced
should be saved (default: )
--charset VAL : Input and output charset for all
files. By default, we accept UTF-8 as
input and output US_ASCII (default: )
--checks_only (--checks-only) : Don't generate output. Run checks,
but no optimization passes. (default:
--define (--D, -D) VAL : Override the value of a variable
annotated @define. The format is
<name>[=<val>], where <name> is the
name of a @define variable and <val>
is a boolean, number, or a
single-quoted string that contains no
single quotes. If [=<val>] is
omitted, the variable is marked true
--help : Displays this message on stdout and
exit (default: true)
--third_party : Check source validity but do not
enforce Closure style rules and
conventions (default: false)
--use_types_for_optimization : Enable or disable the optimizations
based on available type information.
Inaccurate type annotations may
result in incorrect results.
(default: true)
--version : Prints the compiler version to stdout
and exit. (default: false)