options:

-h, --help

Prints help (this message) and exit.

--include-path=PATHS

Sets include paths. Separated by `:'. `;' also supported on windows.

-M, --depends

Outputs a makefile import dependency list to stdout.

--no-color

Disables colorized output.

--ie-compat

Enables IE8 compatibility checks.

--js

Enables inline JavaScript in less files

-l, --lint

Syntax check only (lint).

-s, --silent

Suppresses output of error messages.

--strict-imports

Forces evaluation of imports.

--insecure

Allows imports from insecure https hosts.

-v, --version

Prints version number and exit.

--verbose

Be verbose.

--source-map[=FILENAME]

Outputs a v3 sourcemap to the filename (or output filename.map).

--source-map-rootpath=X

Adds this path onto the sourcemap filename and less file paths.

--source-map-basepath=X

Sets sourcemap base path, defaults to current working directory.

--source-map-include-source

Puts the less files into the map instead of referencing them.

--source-map-inline

Puts the map (and any less files) as a base64 data uri into the output css file.

--source-map-url=URL

Sets a custom URL to map file, for sourceMappingURL comment in generated CSS file.

--source-map-no-annotation

Excludes the sourceMappingURL comment from the output css file.

-rp, --rootpath=URL

Sets rootpath for url rewriting in relative imports and urls Works with or without the relative-urls option.

-ru=, --rewrite-urls=

Rewrites URLs to make them relative to the base less file.

all|local|off

'all' rewrites all URLs, 'local' just those starting with a '.'

-m=, --math=

always

Less will eagerly perform math operations always.

parens-division

Math performed except for division (/) operator

parens | strict

Math only performed inside parentheses

strict-legacy

Parens required in very strict terms (legacy --strict-math)

-su=on|off

Allows mixed units, e.g. 1px+1em or 1px*1px which have units

--strict-units=on|off

that cannot be represented.

--global-var='VAR=VALUE'

Defines a variable that can be referenced by the file.

--modify-var='VAR=VALUE'

Modifies a variable already declared in the file.

--url-args='QUERYSTRING'

Adds params into url tokens (e.g. 42, cb=42 or 'a=1&b=2')

--plugin=PLUGIN=OPTIONS

Loads a plugin. You can also omit the --plugin= if the plugin begins less-plugin. E.g. the clean css plugin is called less-plugin-clean-css once installed (npm install less-plugin-clean-css), use either with --plugin=less-plugin-clean-css or just --clean-css specify options afterwards e.g. --plugin=less-plugin-clean-css="advanced" or --clean-css="advanced"

-------------------------- Deprecated ----------------

-sm=on|off

Legacy parens-only math. Use --math

--strict-math=on|off

--line-numbers=TYPE

Outputs filename and line numbers. TYPE can be either 'comments', which will output the debug info within comments, 'mediaquery' that will output the information within a fake media query which is compatible with the SASS format, and 'all' which will do both.

-x, --compress

Compresses output by removing some whitespaces. We recommend you use a dedicated minifer like less-plugin-clean-css