Django Spaceless Templates

Django application, providing simple template loader. It reduces HTML output in templates by stripping out whitespace characters between HTML and django template tags. With cached template loader, whitespace stripping is done only once during template compilation. This is more efficient than solutions based on {% spaceless %} tag or middleware minification.

This package is based on following unmaintained packages:

• Django template minifying loader
• Django template minified

How much bandwidth does it save? Check data from real project:

Normal HTML	109kB	15kB gzipped
Spaceless HTML	67kB	13kB gzipped
Saved	38 %	12 % gzipped

Installation

pip install django-spaceless-templates

Basic usage

Modify Your Django project settings's module.

For production (note cached loader):

TEMPLATES = [
  {
      'DIRS': [
          str(APPS_DIR.path('templates')),
      ],
      'OPTIONS': {
          'loaders': [
              (
                  'django.template.loaders.cached.Loader', [
                      'django_spaceless_templates.loaders.filesystem.Loader',
                      'django_spaceless_templates.loaders.app_directories.Loader',
                  ],
              ),
          ],
      },
  },
]

For development (each refresh reloads template):

TEMPLATES = [
  {
      'DIRS': [
          str(APPS_DIR.path('templates')),
      ],
      'OPTIONS': {
          'loaders': [
              'django_spaceless_templates.loaders.filesystem.Loader',
              'django_spaceless_templates.loaders.app_directories.Loader',
          ],
      },
  },
]

Settings

Using modified settings You can:

• turn on stripping only for templates with given extensions

TEMPLATE_MINIFIER_FILENAME_EXTENSIONS = ('.html', '.htm', )

• turn off stripping for particular directories

TEMPLATE_MINIFIER_EXCLUDED_DIRS = ('admin/', )

• turn off all stripping

TEMPLATE_MINIFIER = False # default = True

• run Your own strip_function, which preprocess templates

TEMPLATE_MINIFIER_STRIP_FUNCTION = 'template_minifier.utils.strip_spaces_in_template'

• use only in production

if DEBUG:
  TEMPLATE_MINIFIER = False

Known issues

• Don't use // one line comments in your inline javascript <script> tags. Use /* */ instead:

// comment something - !!it's evil!! and cause the rest of JS code is commented out.
function name() {
}

/* comment something - it's nice and clean <3! */
function name() {
}

• Don't use multiline {% blockquote %} without parameter trimmed. Otherwise your blockquote translations won't be translated. Correct usage:

{% blockquote trimmed %}
    My paragraph...
{% blockquote %}

• To preserve extra space use {{ " " }}:

<div>Text {{ " " }} {{ variable }}</div>

Running Tests

(myenv) $ pip install -e .
(myenv) $ python ./runtests.py

Check package

python -m build; python -m twine check dist/*