eslint-plugin-gameface-tailwind

An ESLint plugin that validates Tailwind CSS classes and inline CSS styles in JavaScript/JSX files against Coherent Labs Gameface Framework compatibility.

Install

npm install --save-dev eslint-plugin-gameface-tailwind

Overview

Gameface is a UI framework for Unreal Engine and Unity that supports a subset of the HTML, CSS, JS standards optimized for game interfaces. This ESLint plugin helps identify unsupported CSS properties, values, and Tailwind classes before runtime.

The logic for this plugin is based on the following Gameface documentation:

• Differences to traditional browsers
• Supported Features - CSS Properties
• Supported Features - CSS Selectors
• Tailwind Support

<div className="grid" />  // ❌ Detects grid usage
<div style={{ display: "grid" }} />  // ❌ Detects unsupported grid styles

element.className = "float-left";  // ❌ Detects float usage
element.style.display = "grid";    // ❌ Detects grid usage
element.setAttribute("class", "sticky");  // ❌ Detects sticky positioning

const html = `<div class="grid grid-cols-3">Content</div>`;  // ❌ Detects grid in templates
const template = `<div style="display: block; float: left">`;  // ❌ Detects unsupported styles

Configuration

Add the plugin to your ESLint configuration:

import gamefaceTailwind from 'eslint-plugin-gameface-tailwind';

export default [
  {
    plugins: {
      'gameface-tailwind': gamefaceTailwind
    },
    rules: {
      'gameface-tailwind/classes': 'error',
      'gameface-tailwind/inline-css': 'error'
    }
  }
];

Rules

This plugin provides two rules to help ensure Gameface compatibility:

gameface-tailwind/classes

Detects and reports Tailwind CSS classes that are not supported by Gameface.

Options:

• severity ('error' | 'warning', default: 'warning'): Severity level for violations
• ignoreUnknown (boolean, default: false): Whether to ignore unknown Tailwind classes
• ignoreClasses (string[], default: []): Array of class names to ignore
• autofix (boolean, default: false): Enable automatic removal of unsupported classes

Examples:

// ❌ Will be flagged
<div className="grid grid-cols-3" />     // CSS Grid not supported
<div className="bg-blue-500" />          // Color utilities not supported  
<div className="shadow-lg" />            // Box shadow not supported

// ✅ Gameface-compatible alternatives
<div className="flex" />                 // Flexbox is supported
<div className="border rounded-lg" />    // Border utilities are supported
<div className="p-4 m-2" />             // Spacing utilities are supported

gameface-tailwind/inline-css

Detects and reports inline CSS properties that are not supported by Gameface.

Options:

• severity ('error' | 'warning', default: 'warning'): Severity level for violations
• checkValues (boolean, default: true): Whether to validate CSS property values
• ignoreProperties (string[], default: []): Array of CSS properties to ignore
• autofix (boolean, default: false): Enable automatic removal of unsupported properties

Examples:

// ❌ Will be flagged
<div style={{ display: "grid" }} />              // CSS Grid not supported
<div style={{ boxShadow: "0 4px 8px rgba(0,0,0,0.1)" }} />  // Box shadow not supported
<div style={{ position: "sticky" }} />          // Sticky positioning not supported

// ✅ Gameface-compatible alternatives  
<div style={{ display: "flex" }} />             // Flexbox is supported
<div style={{ border: "1px solid #ccc" }} />    // Border properties are supported
<div style={{ position: "relative" }} />        // Relative positioning is supported

Configuration Presets

Recommended (default):

rules: {
  ...gamefaceTailwind.configs.recommended.rules
}

Use recommended when: You only want to catch definite incompatibilities and can work around partial support limitations.

Strict mode:

rules: {
  ...gamefaceTailwind.configs.strict.rules
}

With strict mode on properties with PARTIAL support will warn:

• max-width/max-height (doesn't support none value)
• justify-content (doesn't support space-evenly)
• align-items (doesn't support baseline)
• background-position (offsets not supported)
• border-style variations with limitations
• And others

Use strict mode when: You want comprehensive validation and are willing to address even partial compatibility issues.

Autofix

Enable autofix to automatically remove unsupported classes:

rules: {
  'gameface-tailwind/classes': ['error', { autofix: true }],
  'gameface-tailwind/inline-css': ['error', { autofix: true }]
}

Before autofix:

<div className="bg-white shadow-lg border rounded-lg p-6">
  <p className="text-gray-600 mb-4">Content</p>
</div>

After autofix:

<div className="border rounded-lg p-6">
  <p className="mb-4">Content</p>
</div>

Examples

Template Literals

// Single-line template literal
const buttonClass = `px-4 py-2 bg-blue-500 text-white rounded`;  // ❌ bg-blue-500, text-white unsupported

// Multi-line template literal  
const cardClasses = `
  bg-white          // ❌ Unsupported
  shadow-lg         // ❌ Unsupported  
  rounded-lg
  p-6
  max-w-sm
`;

// Template literal with conditional classes
const dynamicClass = `
  flex items-center justify-center
  px-4 py-2 rounded-md font-medium
  ${variant === 'primary' ? 'bg-blue-500 text-white' : 'border'}  // ❌ bg-blue-500, text-white
`;

Class Variance Authority (CVA)

import { cva } from 'class-variance-authority';

const buttonVariants = cva(
  "inline-flex items-center justify-center px-4 py-2 rounded-md font-medium transition-colors",  // ❌ inline-flex
  {
    variants: {
      variant: {
        default: "bg-blue-500 text-white shadow-sm",      // ❌ bg-blue-500, text-white, shadow-sm
        destructive: "bg-red-500 text-white shadow-sm",   // ❌ bg-red-500, text-white, shadow-sm
        outline: "border border-gray-300 bg-white text-gray-700",  // ❌ border-gray-300, bg-white, text-gray-700
        ghost: "text-gray-700 hover:bg-gray-100",         // ❌ text-gray-700, hover:bg-gray-100
      },
      size: {
        sm: "h-8 px-3 text-sm",
        lg: "h-12 px-8 text-lg",
      }
    }
  }
);

// Usage with cn utility
<button className={cn(buttonVariants({ variant, size }))}>
  Click me
</button>

Gameface-friendly Example Components

Simple Card Component

function Card({ title, description, onAction }) {
  return (
    <div className="border rounded-lg p-6 max-w-sm">
      <div className="flex items-center justify-between mb-4">
        <h3 className="text-lg font-semibold">{title}</h3>
        <button className="text-sm opacity-75">×</button>
      </div>
      <p className="mb-4">{description}</p>
      <div className="flex justify-end">
        <button 
          className="px-4 py-2 border rounded"
          onClick={onAction}
        >
          Action
        </button>
      </div>
    </div>
  );
}

Button Component with Supported Variants

function Button({ variant = 'default', size = 'md', children, ...props }) {
  const baseClasses = "items-center justify-center px-4 py-2 rounded-md font-medium";
  
  const variantClasses = {
    default: "border",
    outline: "border",
  };
  
  const sizeClasses = {
    sm: "h-8 px-3 text-sm",
    md: "px-4 py-2", 
    lg: "h-12 px-8 text-lg",
  };
  
  return (
    <button 
      className={`${baseClasses} ${variantClasses[variant]} ${sizeClasses[size]}`}
      {...props}
    >
      {children}
    </button>
  );
}

Form Component

function Form({ onSubmit }) {
  return (
    <form className="max-w-md" onSubmit={onSubmit}>
      <div className="mb-4">
        <label className="block text-sm font-medium mb-2">
          Email
        </label>
        <input 
          type="email"
          className="w-full px-3 py-2 border rounded-md"
        />
      </div>
      
      <div className="mb-6">
        <label className="block text-sm font-medium mb-2">
          Password
        </label>
        <input 
          type="password"
          className="w-full px-3 py-2 border rounded-md"
        />
      </div>
      
      <button className="w-full py-2 px-4 rounded-md font-medium">
        Sign In
      </button>
    </form>
  );
}