Minify HTML in Flask using Flask-Minify
Last Updated :
04 Jul, 2021
Flask offers HTML rendering as output, it is usually desired that the output HTML should be concise and it serves the purpose as well. In this article, we would display minification of output routes of Flask responses using the library – Flask-Minify.
Advantages of Minification
- Websites load faster as fewer lines are there to upload and download.
- Bandwidth cost is reduced as less data is flown over the network.
- Decompression is not needed before usage.
- As the site loads faster, UX and SEO improve as well.
Installation
To install this module type the below command in the terminal.
pip install Flask-Minify
Function Used: minify(self, app=None, html=True, js=True, cssless=True, fail_safe=True, bypass=[], passive=False, static=True, script_types=[])
Parameters:
- app: Flask app instance to be initiated.
- js: Minify js or not.
- cssless: Minify css or not.
- fail_safe: To avoid raising error while minifying.
- bypass: List of endpoints to bypass minifying.
- passive: to selectively minify routes
- static: To enable minifying static files css, less and js.
- script_types: List of script types to limit js minification to.
Stepwise Implementation
Step 1: Importing libraries and initializing Minify with app context.
Python3
from flask import Flask
from flask_minify import minify
app = Flask(__name__)
minify(app=app, html=True, js=True, cssless=True)
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Step 2: Adding route, output HTML with minified code.
Python3
@app.route('/')
def sample_minify():
return
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Step 3 : Running application
Python3
if __name__ == "__main__":
app.run()
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Output :
Example 2: Applying minification to some routes
In this, we can perform minification on only required routes not all, as per requirements. This is done by passing “passive=True” while passing context.
Python3
from flask import Flask
from flask_minify import minify, decorators
app = Flask(__name__)
minify(app=app, passive=True)
@app.route('/')
@decorators.minify(html=True, js=True, cssless=True)
def sample_minify():
return
@app.route('/no_mini')
def no_minify():
return
if __name__ == "__main__":
app.run()
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Output :
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