Upgrade Tool Fails - Reflect.ownKeys called on non-object

[ethan-christensen-cag]

Hello all. I am trying to upgrade tailwind to v4 with the tool. However, when I run the tool, I get this error message. I have tried to hunt down what is causing this error, but am having trouble finding a way to get the tool to be more detailed when it fails.

Error

≈ tailwindcss v4.1.3

│ Searching for CSS files in the current directory and its subdirectories…

│ ↳ Linked `.\tailwind.config.js` to `.\src\styles.css`

│ Migrating JavaScript configuration files…

│ ↳ Could not load the configuration file: Reflect.ownKeys called on non-object

Config

/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    "./**/templates/**/*.html",
    "./src/**/*.{html,ts,scss,css}"
  ],
  theme: {
    fontFamily: {
      poppins: ['Poppins'],
      archivo: ['Archivo', 'sans'],
      jetbrainsMono: ['JetBrains Mono', 'monospace'],
      sans: [
        '-apple-system',
        'BlinkMacSystemFont',
        'Inter',
        'ui-sans-serif',
        'system-ui',
        'Segoe UI',
        'Roboto',
        'Ubuntu',
        'Cantarell',
        'Noto Sans',
        'sans-serif',
        'Helvetica Neue',
        'Arial',
        'Apple Color Emoji',
        'Segoe UI Emoji',
        'Segoe UI Symbol',
        'Noto Color Emoji',
      ],
    },
    colors: {
      border: "hsl(var(--border))",
      input: "hsl(var(--input))",
      ring: "hsl(var(--ring))",
      background: "hsl(var(--background))",
      foreground: "hsl(var(--foreground))",
      primary: {
        DEFAULT: "hsl(var(--primary))",
        foreground: "hsl(var(--primary-foreground))",
      },
      secondary: {
        DEFAULT: "hsl(var(--secondary))",
        foreground: "hsl(var(--secondary-foreground))",
      },
      destructive: {
        DEFAULT: "hsl(var(--destructive))",
        foreground: "hsl(var(--destructive-foreground))",
      },
      muted: {
        DEFAULT: "hsl(var(--muted))",
        foreground: "hsl(var(--muted-foreground))",
      },
      accent: {
        DEFAULT: "hsl(var(--accent))",
        foreground: "hsl(var(--accent-foreground))",
      },
      'accent-2': {
        DEFAULT: "hsl(var(--accent-2))",
        foreground: "hsl(var(--accent-foreground))",
      },
      popover: {
        DEFAULT: "hsl(var(--popover))",
        foreground: "hsl(var(--popover-foreground))",
      },
      card: {
        DEFAULT: "hsl(var(--card))",
        foreground: "hsl(var(--card-foreground))",
      },
    },
    extend: {
      borderRadius: {
        lg: 'var(--radius)',
        md: 'calc(var(--radius) - 2px)',
        sm: 'calc(var(--radius) - 4px)',
        '2xl': 'calc(var(--radius) + 25px)',
      },
      borderWidth: 'var(--border-width)',
      keyframes: {
        'accordion-down': {
          from: { height: '0' },
          to: { height: 'var(--radix-accordion-content-height)' },
        },
        'accordion-up': {
          from: { height: 'var(--radix-accordion-content-height)' },
          to: { height: '0' },
        },
        'toast-in': {
          '0%': { transform: 'translateY(-100%)', opacity: 0 },
          '100%': { transform: 'translateY(0)', opacity: 1 },
        },
        'toast-out': {
          '0%': { transform: 'translateX(0)', opacity: 1 },
          '100%': { transform: 'translateX(100%)', opacity: 0 },
        },
      },
      animation: {
        'accordion-down': 'accordion-down 0.2s ease-out',
        'accordion-up': 'accordion-up 0.2s ease-out',
        'toast-in': 'toast-in 0.5s ease-in-out forwards',
        'toast-out': 'toast-out 0.5s ease-in-out forwards',
      },
    },
  }
};

[wongjn]

I think the error could be coming from your string value for borderWidth - it should be an object:

   '2xl': 'calc(var(--radius) + 25px)',
 },
-borderWidth: 'var(--border-width)',
+borderWidth: {
+  DEFAULT: 'var(--border-width)',
+},
 keyframes: {
   'accordion-down': {

[ethan-christensen-cag]

Completely missed that one, thanks!