Using Tokens for Adaptive UIs

1. Introduction

Adaptive user interfaces (UIs) adjust their layout, style, and functionality based on user preferences, device, screen size, or context. Design tokens play a crucial role in creating such adaptive UIs by providing a consistent way to manage design attributes.

2. Key Concepts

3. Step-by-Step Process

3.1 Define Design Tokens

Start by defining your design tokens in a structured format (JSON, YAML, etc.). Here’s an example of a JSON file for design tokens:

{
    "colors": {
        "primary": "#007bff",
        "secondary": "#6c757d"
    },
    "spacing": {
        "small": "8px",
        "medium": "16px",
        "large": "24px"
    }
}

3.2 Create a Theme System

Create a theme system that utilizes these tokens. Here’s how you can define a theme in JavaScript:

const theme = {
    colors: {
        background: "#ffffff",
        text: "#000000"
    },
    spacing: {
        padding: "16px"
    }
};

3.3 Implement Adaptive Logic

Utilize the tokens in your UI components. For instance, you can use CSS variables to apply the tokens:

:root {
    --primary-color: #007bff;
    --spacing-medium: 16px;
}

.button {
    background-color: var(--primary-color);
    padding: var(--spacing-medium);
}

3.4 Test Across Devices

Ensure that your adaptive UI functions correctly across different devices and screen sizes. Use responsive design techniques and media queries to adjust layouts.

/* Example media query */
@media (max-width: 600px) {
    .button {
        padding: var(--spacing-small);
    }
}

4. Best Practices

• Define clear naming conventions for tokens.
• Use a centralized location for your design tokens.
• Document your tokens and their usage.
• Regularly review and update tokens based on user feedback.
• Test themes in various scenarios to ensure adaptability.

5. FAQ