Why use “flask_stip_whitespace” ?

• Adds line break to InlineJS.

• It can automagically minify inline CSS, JS.

• Removes <!–prettier-ignore–> from HTML.

• It speeds up website by reducing the HTML size.

• It compiles regex at runtime. So it’s blazing fast.

• Its mostly based on C ( gzip ) and Rust ( minify-html ) libraries.

• Significantly lower bytes transferred when working with frameworks like AlpineJs ( Almost fully working & Please open a issue in the Issue Tracker if you encounter any bug) & Petite Vue.

• Is very customizable. ( You can configure lower level minify-html rust bindings and also the lower level python bindings from flask’s configuration )

Why shouldn’t you use “flask_stip_whitespace” ?

• You don’t like having unnecessary ‘;;’ in your HTML. ( If you know any regex to fix this please put a pull request )

• Although I tried my best to use Compiled Language for Optimizations. It can still be sub miliseconds ( > 0.001 ) slower compared to normal Flask Rendering. ( If you know any way to improve performance, please put a pull request )

Rust :

The module allows rust minifier options to be changed from Flask’s environ variables. If you would like to change any settings, refer to minify-html’s source code.

The bindings are ( by default set to True ):

STRIP_WHITESPACE_RUST_DO_NOT_MINIFY_DOCTYPE, # passes do_not_minify_doctype to minify-html
STRIP_WHITESPACE_RUST_ENSURE_SPEC_CONPLIANT_UNQUOTED_ATTRIBUTE_VALUES, # passes ensure_spec_compliant_unquoted_attribute_values to minify-html
STRIP_WHITESPACE_RUST_KEEP_CLOSING_TAGS, # passes keep_closing_tags to minify-html
STRIP_WHITESPACE_RUST_KEEP_COMMENTS, # passes keep_comments to minify-html
STRIP_WHITESPACE_RUST_KEEP_HTML_AND_HEAD_OPENING_TAGS, # passes keep_html_and_head_opening_tags to minify-html
STRIP_WHITESPACE_RUST_KEEP_SPACES_BETWEEN_ATTRIBUTES, # passes keep_spaces_between_attributes to minify-html
STRIP_WHITESPACE_RUST_MINIFY_CSS, # passes minify_css to minify-html
STRIP_WHITESPACE_RUST_MINIFY_JS, # passes minify_js to minify-html
STRIP_WHITESPACE_RUST_REMOVE_BANGS, # passes remove_bangs to minify-html
STRIP_WHITESPACE_RUST_REMOVE_PROCESSING_INSTRUCTIONS, # passes remove_processing_instructions to minify-html

If you would like to change any of the above variables, simply put them in STRIP_WHITESPACE_CONFIG ( Please note that every variable here is a python boolean ).

For example:

STRIP_WHITESPACE_CONFIG['STRIP_WHITESPACE_RUST_DO_NOT_MINIFY_DOCTYPE'] = False

Python :

The module allows python minifier options to be changed from Flasks’s environ variables. If you would like to change any settings, refer to python-module’s source code.

The bindings are ( by default set to a sane value ):

STRIP_WHITESPACE_PYTHON_REMOVE_COMMENTS, # False | removes comments from HTML using python ( not recommended cause rust can do that just fine and fast )
STRIP_WHITESPACE_PYTHON_CONDENSE_STYLE_FROM_HTML, # True | replaces '<style text/css>' -> '<style>'
STRIP_WHITESPACE_PYTHON_CONDENSE_SCRIPT_FROM_HTML, # True | replaces '<script text/javascript>' -> '<script>'
STRIP_WHITESPACE_PYTHON_CLEAN_UNNEEDED_HTML_TAGS, # True | removes some unnecessary tags
STRIP_WHITESPACE_PYTHON_CONDENSE_HTML_WHITESPACE, # True | This is where the magic happens.
STRIP_WHITESPACE_PYTHON_UNQUOTE_HTML_ATTRIBUTES, # True | This is also a magic module.

If you would like to change any of the above variables, simply put them in STRIP_WHITESPACE_CONFIG ( Please note that every variable here is a python boolean )

For example:

STRIP_WHITESPACE_CONFIG['STRIP_WHITESPACE_PYTHON_REMOVE_COMMENTS'] = True