Skip to main content

Flask extension to serve Webpack bundles

Project description


Flask-Bundler allows you to serve your project assets from Webpack directly, allowing cache busting and easy deployment.

It uses Webpack's BundleTracker plugin to get information about the bundles in your configuration and to serve them.


You need to configure Webpack to output webpack-stats.json. For this, add webpack-bundle-tracker as a Node dependency to your project and in your webpack.config.js add:

const BundleTracker = require("webpack-bundle-tracker");
// ...
module.exports = {
    // ...
    plugins: [
        // ...
        new BundleTracker({
            filename: "./myapp/static/webpack-stats.json"
        // ...
    // ...

You can place the webpack-stats.json file anywhere in the application. By default Flask-Bundler will check for webpack-stats.json inside the application's static folder.

Afterwards, just initialize Flask-Bundler like you would with any extension.

Normal initialization

from flask import Flask
from flask_bundler import Bundler

app = Flask(__name__)
# ...
bundler = Bundler(app)

Application factory initialization

from flask import Flask
from flask_bundler import Bundler

bundler = Bundler()

def create_app():
    app = Flask(__name__)
    # ...
    # ...
    return app

Bundler options

When initializing Bundler, you can specify a few options.


Path to the webpack-stats.json. Defaults to {app.static_folder}/webpack-stats.json.


A dictionary of custom renderers. str.format will be called on the given string with the public path of the asset as the only parameter. The default renderers are css and js, but additional renderers can be passed if your application contains other types of outputs.


If True, an error will be raised in exceptional situations. Otherwise, a warning will be issued and the empty string will be returned for the bundle.


© Efe Mert Demir 2020. This software is licensed under the BSD license.

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for Flask-Bundler, version 1.0.2
Filename, size File type Python version Upload date Hashes
Filename, size Flask_Bundler-1.0.2-py3-none-any.whl (4.2 kB) File type Wheel Python version py3 Upload date Hashes View hashes
Filename, size Flask-Bundler-1.0.2.tar.gz (4.0 kB) File type Source Python version None Upload date Hashes View hashes

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page