Python Web Static Resource Management: Correctly Including CSS and JS Files in Flask
This article introduces methods to incorporate static resources like CSS and JS in Flask. Static resources, including CSS (styling), JS (interactivity), and images, should be placed in the `static` folder at the project root directory (automatically mapped to the `/static/` path by Flask). Template files are stored in the `templates` folder. The project structure should include `static` and `templates`. Static resources can be organized into subfolders by type (e.g., `css/`, `js/`). Within templates, use `url_for('static', filename='path')` to reference resources, for example: ```html <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}"> <script src="{{ url_for('static', filename='js/script.js') }}"></script> ``` Common issues: Path errors (such as incorrect filenames or missing subfolders) may result in 404 errors. Ensure the `static` folder exists and filenames are correct. Key points: Place static resources in `static`, use `url_for` for incorporation, and maintain a standardized structure to avoid issues.
Read MoreStep-by-Step Guide: Flask Routes and View Functions, Build Your First Web Page in 10 Minutes
Flask is a lightweight Python Web framework, simple and flexible, suitable for beginners, and supports extensibility as needed. Installation requires Python 3.6+, and can be done via `pip install flask`. To verify, use `flask --version`. The core of a basic application: Import the Flask class and instantiate an `app` object; define the root route with `@app.route('/')`, binding to the view function `home()`, which returns content (e.g., "Hello, Flask!"); `app.run()` starts the development server (default port 5000). For advanced support, dynamic routing is available, such as `/user/<username>`, where the view function receives parameters to implement personalized responses, supporting types like `int` and `float`. Core concepts: Routes bind URLs to functions, view functions handle requests and return content, and `app.run()` starts the service. Key techniques: `if __name__ == '__main__'` ensures the service starts when the script is run directly, and dynamic routing enhances page flexibility.
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