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How to Successfully Integrate a Custom Google Font in Your Plotly Dash App

Struggling to implement a custom Google font in your Plotly Dash app? This guide provides a step-by-step solution to help you achieve the desired typography.
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This video is based on the question https://stackoverflow.com/q/69258350/ asked by the user 'Robert Marciniak' ( https://stackoverflow.com/u/13283988/ ) and on the answer https://stackoverflow.com/a/69258949/ provided by the user 'user11989081' ( https://stackoverflow.com/u/11989081/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license.

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Integrating a Custom Google Font in Your Plotly Dash App

If you're building a Plotly Dash application, you might want to give it a distinctive look by utilizing custom fonts from Google Fonts. However, many developers encounter difficulties in implementing these fonts as intended. This can lead to frustration, especially if the app defaults to generic font styles. Fortunately, there's a systematic approach to ensuring that your chosen Google font works seamlessly in your Dash application.

The Problem: Custom Font Not Displaying Correctly

One user faced a common issue when attempting to integrate a specific Google font into their Dash app. Despite adding the suggested CSS code to their assets folder, the font rendered as a generic cursive style instead of the desired font, "Poiret One." This prompted questions about the correct way to set up the external stylesheets for the app.

CSS Setup Issues

The attempted method included the following CSS code in their styles.css:

[[See Video to Reveal this Text or Code Snippet]]

While they also tried adding the Google font directly to the external stylesheets in the Dash app setup, they faced limitations in executing the changes successfully.

The Solution: Step-by-Step Guide

To resolve this issue, you can follow this step-by-step guide. Here’s how to correctly incorporate your custom Google font into your Plotly Dash app.

Step 1: Import the Necessary Dash Components

Start by importing the required libraries in your app.py file:

[[See Video to Reveal this Text or Code Snippet]]

These imports will allow you to create a Dash application and utilize Bootstrap components for styling.

Step 2: Set Up External Stylesheets

Next, set up the external stylesheets in your Dash application. Make sure to include the link to your desired Google font within the external_stylesheets list.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Enable Local CSS Serving

To ensure that your application can properly load the CSS stylesheet in the browser, include the following line in your app configuration:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Define Your Layout

In the layout section of your app, specify how you want the text displayed. Here's an example of a simple text component utilizing your Google Font:

[[See Video to Reveal this Text or Code Snippet]]

Step 5: Write Your CSS Styles

In your styles.css, only define the body font family like this:

[[See Video to Reveal this Text or Code Snippet]]

This ensures that the chosen font is applied globally across your app.

Step 6: Run Your Application

Finally, run your Dash app using the following command:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following these steps, you should be able to successfully integrate a custom Google font into your Plotly Dash app. With careful attention to your stylesheet setup and app configuration, your app will not only function well, but it will also reflect your unique design preferences. This approach not only enhances the visual appeal of your application but also offers a better experience for users.

Now you can proudly display your Dash application with the stylish typography it deserves!

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