Metadata-Version: 2.1
Name: django-static-class-minifier
Version: 0.0.9
Summary: Precompress Django static files with class names shortening.
Home-page: https://github.com/Navaneeth-Nagesh/django-static-class-minifier
Author: Navaneeth Nagesh
Author-email: navaneethnagesh56@gmail.com
License: MIT
Keywords: Django,class-minifier,compressor,pre-processor
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Environment :: Web Environment
Classifier: Framework :: Django
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Topic :: Software Development :: Pre-processors
Description-Content-Type: text/markdown
Requires-Dist: Django
Requires-Dist: Brotli (~=1.0.4)
Requires-Dist: zopfli (~=0.1.4)
Requires-Dist: yaspin (~=0.14.3)

# Django Static class minifier

### Description

The class minifier package shortens the class name in the DOM to single character and reduces the file size. more about the algorithm in the upcoming blog post.

End result : ![Alt](https://github.com/Navaneeth-Nagesh/django-static-class-minifier/blob/master/snaps/example.JPG?raw=true  "Example")


### Installation

`$ pip install django-static-class-minifier`

(you may want to write this in your requirements.txt)

In settings.py -

In Installed apps -
```
INSTALLED_APPS = [
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'static_compressor', #installed app
'.....'
]
```
In Middleware -
```
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'static_compressor.middleware.MinifyClassMiddleware', # Add this line, right after csrf middleware.
'django.contrib.auth.middleware.AuthenticationMiddleware',
```

Make sure, you have set up path of static files and static root directory.
```
STATICFILES_DIRS = (
os.path.join(BASE_DIR, 'static'),
)

STATIC_ROOT = os.path.join(BASE_DIR, 'all_staticfiles')
```
Update the static files storage:

`STATICFILES_STORAGE = 'static_compressor.staticfiles_storage.CompressedStaticFilesStorage'`

When you run `$ python manage.py collectstatic` it will have an additional post-processing pass to compress your static files and it creates data.json file which contains classes from all included css files and js files.

The class selectors which js files consider and change -
```
querySelector('.flex-box');
querySelectorAll('.flex-boxes');
classList.contains('active');
classList.add('active);
classList.remove('active');
classList.toggle('active');
```

If your adding classes to the DOM based on http response or a common function which appends class to the dom, then consider excluding those files. Right now that's the limitation of this project. In the future, There might be a syntax to consider those classes.

Make sure that your web server is configured to serve precompressed static files:

* If using nginx:
	* Setup [ngx_http_gzip_static_module](https://nginx.org/en/docs/http/ngx_http_gzip_static_module.html) to serve gzip (.gz) precompressed files. 
	* Out of tree module [ngx_brotli](https://github.com/google/ngx_brotli) is required to serve Brotli (.br) precompressed files.
* [Caddy](https://caddyserver.com/) will serve .gz and .br without additional configuration.

Also, as Brotli is not supported by all browsers you should make sure that your reverse proxy/CDN honor the Vary header, and your web server set it to [`Vary: Accept-Encoding`](https://blog.stackpath.com/accept-encoding-vary-important).

### Available Storages

* `static_compress.CompressedStaticFilesStorage`: Generate `.br` and `.gz` from your static files
* `static_compress.CompressedManifestStaticFilesStorage`: Like [`ManifestStaticFilesStorage`](https://docs.djangoproject.com/en/1.11/ref/contrib/staticfiles/#manifeststaticfilesstorage), but also generate compressed files for the hashed files
* `static_compress.CompressedCachedStaticFilesStorage`: Like [`CachedStaticFilesStorage`](https://docs.djangoproject.com/en/1.11/ref/contrib/staticfiles/#cachedstaticfilesstorage), but also generate compressed files for the hashed files
You can also add support to your own backend by applying `static_compressor.staticfiles_storage.CompressMixin` to your class.
By default it will only compress files ending with `.js`, `.css` and `.svg`. This is controlled by the settings below.

### Settings

_django-static-class-minifier_ settings and their default values:

```
EXCLUDE_STATIC_JS_FILES = [''] # exclude js libraries from classnames minifier
EXCLUDE_STATIC_CSS_FILES = ['']
EXCLUDE_STATIC_SVG_FILES = ['']
EXCLUDE_STATIC_DIRECTORY = ['']
EXCLUDE_URL_MINIFICATION = ['']
EXCLUDED_CLASSNAMES_FROM_MINIFYING = ['']
MINIFY_CLASS_HTML = False # Change it to True in production environment
# By default, the admin files classes won't be minified.
STATIC_CLASSES_FILE_NAME = 'data.json' # It should be an json file

STATIC_COMPRESS_FILE_EXTS = ['js', 'css', 'svg']
STATIC_COMPRESS_METHODS = ['gz', 'br']
STATIC_COMPRESS_KEEP_ORIGINAL = True
STATIC_COMPRESS_MIN_SIZE_KB = 30
```
Default values types and description -

|Settings|Type  | Description|
|--|--|--|
|EXCLUDE_STATIC_JS_FILES| _Array_ |These js files will be excluded from classnames shortening, In other words the class names won't be changed. |
|EXCLUDE_STATIC_CSS_FILES|_Array_|Same as above but for css files.
|EXCLUDE_STATIC_SVG_FILES| _Array_| Same as above but for svg files |
|EXCLUDE_STATIC_DIRECTORY| _Array_| The directory name in the array will be excluded from class names shortening.|
|EXCLUDE_URL_MINIFICATION|_Array_| The URL in the array will exclude from shortening of class names.
|EXCLUDED_CLASSNAMES_FROM_MINIFYING|_Array_| The words in an array won't be shortened.
|MINIFY_CLASS_HTML|_Boolean_| If its True it minifies class names in the HTML. Make sure there is JSON file or it will throws an error.
|STATIC_CLASSES_FILE_NAME|_String_| The JSON file name. By default its data.json

### Resources

In case, If you want to Internal style or Internal load script in the HTML. Then consider using [Django Inline Static](https://pypi.org/project/django-inline-static/) package.  

### File size reduction
```
Original file - 100k style.css
compressed class minifier file - 70k style.css (30% reduction in file size)
(Note - reduction of the file depends on the number of class selectors used and the length of the class name.)
After brotli and Gzip compression - 40k style.css.gz (60% reduction in file size, in total), 35k style.css.br (65% reduction in file size) 
```
### Credits
I have merged the code with django-static-compress package to enable gzip and brotli compression.
In case, if you just use brotli and gzip compression without using class minifier. You can use [django-static-compress](https://github.com/whs/django-static-compress)
The author of django-static-compress [Manatsawin Hanmongkolchai](https://github.com/whs)

### Licence
Licensed under the [MIT License](https://github.com/Navaneeth-Nagesh/django-static-class-minifier/blob/master/LICENCE)

_Happy coding! :)_

