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How to apply custom CSS styles in Retool?

Learn how to apply custom CSS styles in Retool to enhance your app's UI, from setup to deploying changes, while ensuring style consistency and performance.

Matt Graham, CEO of Rapid Developers

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How to apply custom CSS styles in Retool?

 

Applying Custom CSS Styles in Retool

 

Applying custom CSS styles in Retool involves understanding how Retool interacts with CSS and injecting styles into your application's UI elements. Below is a detailed guide to integrating custom CSS in Retool.

 

Prerequisites

 

  • Access to a Retool account with permissions to edit applications.
  • Basic understanding of CSS and how it works in styling web components.

 

Understanding Retool's Style Mechanism

 

  • Retool operates on a WYSIWYG interface, but allows customizations using custom CSS for further design enhancements.
  • Classes in Retool can be defined globally or scoped to specific applications.

 

Setting Up Your Retool Application

 

  • Log in to your Retool account and open the app where you want to apply custom styles.
  • Navigate to the application editor where you manage your components on the canvas.

 

Injecting Custom CSS into Retool

 

  • Retool allows you to inject CSS directly into the app settings.
  • In the app editor, click the gear icon (App Settings) located in the top-right corner of the interface.
  • Scroll down to the "Custom CSS" section where you can define your styles.
  • Example:
    <pre>
    .custom-button {
      background-color: #007bff;
      color: white;
      border-radius: 5px;
      padding: 10px 15px;
    }
    </pre>
    

 

Applying Styles to Components

 

  • Select the component you want to style from the editor canvas.
  • In the right-side properties panel, locate the "Styles" tab where you can add class names.
  • Enter the class name you defined in the Custom CSS section (e.g., custom-button).

 

Using the Query Editor for Dynamic Styles

 

  • The query editor can be utilized to manipulate style classes dynamically based on data or user actions.
  • For instance, add a JavaScript query that updates the relevant component's class list based on specific conditions.
  • Example:
    <pre>
    // Assuming you have a button component named 'myButton'
    if ({{yourData.value}} > 10) {
      document.querySelector('.myButton').classList.add('custom-button');
    } else {
      document.querySelector('.myButton').classList.remove('custom-button');
    }
    </pre>
    

 

Previewing and Debugging

 

  • Use the preview mode to see how your styles affect the application's appearance.
  • Inspect elements using your browser's developer tools to ensure classes are applied correctly and troubleshoot CSS conflicts.

 

Deploying Changes

 

  • Once satisfied with your custom styles and their functionality, proceed to deploy the application.
  • Ensure you test thoroughly across different browsers and resolutions to verify style consistency and performance.

 

By following these steps, you can effectively integrate custom CSS styles into your Retool applications, enhancing the visual presentation and user interface to better fit your specific requirements. Always ensure that your CSS does not inadvertently interfere with Retool's default styling unless intended.

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