sass input.scss output.css

It is used to run the SASS code from the command line.

sass –watch input.scss:output.css

It informs SASS to watch the file and update the CSS whenever SASS file changes.

sass –watch app/sass:public/stylesheets

It is used to watch the entire directory, if SASS contains many files in a directory.

:style

It displays style of the output.

:syntax

You can use indented syntax for sass and CSS extension syntax for scss.

:property_syntax

It uses indented syntax to make use of properties. If it is not correct, then it will throw an error. For instance, consider “background: #F5F5F5” in which background is a property name and #F5F5F5 is its property value. You must use colon after the property name.

:cache

It speeds up compilation of SASS files. It is set to true by default.

:read_cache

It read only SASS files if cache is not set and read_cache is set.

:cache_store

It can be used to store and access the cached result by setting it to an instance of Sass::CacheStores::Base.

:never_update

It should never update the CSS file if the template files changes. By default it is set to false.

:always_update

It should update the CSS file whenever the template files changes.

:always_check

It should check for the updates whenever the server starts. It will recompile and overwrite the CSS file, if there is an update in the SASS template file.

:poll

It uses polling backend for Sass::Plugin::Compiler#watch (which watches the template and updation of CSS files) by setting it to true.

:full_exception

It displays the error description whenever an exception occurs in SASS code within generated CSS file. It displays a line number where an error occurred along with source in the CSS file.

:template_location

It provides the path for the template directory in the application.

:css_location

It provides the path for the CSS stylesheets in the application.

:unix_newlines

It provides Unix style newlines when writing files by setting it to true.

:filename

It is name of the filename being displayed and used for reporting errors.

:line

It specifies the first line of the SASS template and displays the line numbers for errors.

:load_paths

It is used to load the paths for SASS template which are included using @import directive.

:filesystem_importer

It is used to import files from file system that uses Sass::Importers::Base sub class to handle string load paths.

:sourcemap

It generates source maps which instructs browser to find the SASS styles. It uses three values −

• :auto − It contains relative URIs. If there is no relative URI, then uses “file:” URI.

• :file − It uses “file:” URIs, which work locally, not on remote server.

• :inline − It contains source text in the source map which is used to create large source map files.

:line_numbers

It displays the line number for errors reported in the CSS file by setting it to true.

:trace_selectors

It helps to trace the selectors of imports and mixins when it is set to true.

:debug_info

It provides debug information of SASS file using line number and file when it is set to true.

:custom

It makes data available to SASS functions in the separate applications.

:quiet

It disables the warnings by setting it to true.