[bug]: Missing animation variables in Tailwind v4

[dlhck]

Describe the bug

Currently the animations (keyframes + animation) are not added to the css file that imports tailwindcss.

I fixed it by adding the following for the accordion:

@theme {
  @keyframes accordion-down {
    0% {
      height: 0;
    }
    100% {
      height: var(--radix-accordion-content-height);
    }
  }

  @keyframes accordion-up {
    0% {
      height: var(--radix-accordion-content-height);
    }
    100% {
      height: 0;
    }
  }

  --animate-accordion-down: accordion-down 0.2s ease-out;
  --animate-accordion-up: accordion-up 0.2s ease-out;
}

Affected component/components

Accordion

How to reproduce

1. Add Accordion
2. Toggle Accordion
3. No animations executed

Codesandbox/StackBlitz link

No response

Logs

System Info

Every browser, OS because css classes are simply missing

Before submitting

• [x] I've made research efforts and searched the documentation
• [x] I've searched for existing issues

[shadcn]

does it not add it when you run npx shadcn@latest add accordion?

[dlhck]

does it not add it when you run npx shadcn@latest add accordion?

No, they are not getting added. It tried adding it multiple times - both with shadcn@latest and shadcn@canary

[jasongitmail]

In case it's not intentional, the accordion's manual instructions still mention to use tailwind.config.js for the keyframes, instead of defining it in CSS. The CSS animations in the OP worked for me. https://ui.shadcn.com/docs/components/accordion

[shadcn]

@dlhck can you share your globals.css please? before adding the animations.

[bernaferrari]

@import "tailwindcss";

@plugin "tailwindcss-animate";

@custom-variant dark (&:is(.dark *));

@theme inline {
  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --font-sans: var(--font-geist-sans);
  --font-mono: var(--font-geist-mono);
  --color-sidebar-ring: var(--sidebar-ring);
  --color-sidebar-border: var(--sidebar-border);
  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
  --color-sidebar-accent: var(--sidebar-accent);
  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
  --color-sidebar-primary: var(--sidebar-primary);
  --color-sidebar-foreground: var(--sidebar-foreground);
  --color-sidebar: var(--sidebar);
  --color-chart-5: var(--chart-5);
  --color-chart-4: var(--chart-4);
  --color-chart-3: var(--chart-3);
  --color-chart-2: var(--chart-2);
  --color-chart-1: var(--chart-1);
  --color-ring: var(--ring);
  --color-input: var(--input);
  --color-border: var(--border);
  --color-destructive: var(--destructive);
  --color-accent-foreground: var(--accent-foreground);
  --color-accent: var(--accent);
  --color-muted-foreground: var(--muted-foreground);
  --color-muted: var(--muted);
  --color-secondary-foreground: var(--secondary-foreground);
  --color-secondary: var(--secondary);
  --color-primary-foreground: var(--primary-foreground);
  --color-primary: var(--primary);
  --color-popover-foreground: var(--popover-foreground);
  --color-popover: var(--popover);
  --color-card-foreground: var(--card-foreground);
  --color-card: var(--card);
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);
}

:root {
  --radius: 0.625rem;
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.145 0 0);
  --primary: oklch(0.205 0 0);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.97 0 0);
  --secondary-foreground: oklch(0.205 0 0);
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.97 0 0);
  --accent-foreground: oklch(0.205 0 0);
  --destructive: oklch(0.577 0.245 27.325);
  --border: oklch(0.922 0 0);
  --input: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);
  --chart-1: oklch(0.646 0.222 41.116);
  --chart-2: oklch(0.6 0.118 184.704);
  --chart-3: oklch(0.398 0.07 227.392);
  --chart-4: oklch(0.828 0.189 84.429);
  --chart-5: oklch(0.769 0.188 70.08);
  --sidebar: oklch(0.985 0 0);
  --sidebar-foreground: oklch(0.145 0 0);
  --sidebar-primary: oklch(0.205 0 0);
  --sidebar-primary-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.97 0 0);
  --sidebar-accent-foreground: oklch(0.205 0 0);
  --sidebar-border: oklch(0.922 0 0);
  --sidebar-ring: oklch(0.708 0 0);
}

.dark {
  --background: oklch(0.145 0 0);
  --foreground: oklch(0.985 0 0);
  --card: oklch(0.205 0 0);
  --card-foreground: oklch(0.985 0 0);
  --popover: oklch(0.205 0 0);
  --popover-foreground: oklch(0.985 0 0);
  --primary: oklch(0.922 0 0);
  --primary-foreground: oklch(0.205 0 0);
  --secondary: oklch(0.269 0 0);
  --secondary-foreground: oklch(0.985 0 0);
  --muted: oklch(0.269 0 0);
  --muted-foreground: oklch(0.708 0 0);
  --accent: oklch(0.269 0 0);
  --accent-foreground: oklch(0.985 0 0);
  --destructive: oklch(0.704 0.191 22.216);
  --border: oklch(1 0 0 / 10%);
  --input: oklch(1 0 0 / 15%);
  --ring: oklch(0.556 0 0);
  --chart-1: oklch(0.488 0.243 264.376);
  --chart-2: oklch(0.696 0.17 162.48);
  --chart-3: oklch(0.769 0.188 70.08);
  --chart-4: oklch(0.627 0.265 303.9);
  --chart-5: oklch(0.645 0.246 16.439);
  --sidebar: oklch(0.205 0 0);
  --sidebar-foreground: oklch(0.985 0 0);
  --sidebar-primary: oklch(0.488 0.243 264.376);
  --sidebar-primary-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.269 0 0);
  --sidebar-accent-foreground: oklch(0.985 0 0);
  --sidebar-border: oklch(1 0 0 / 10%);
  --sidebar-ring: oklch(0.556 0 0);
}

@layer base {
  * {
    @apply border-border outline-ring/50;
  }
  body {
    @apply bg-background text-foreground;
  }
}

[dlhck]

@bernaferrari exactly the same on my side.

[ilyahahaha]

Other possible solution:

I fixed this by adding the following classes to the base layer:

  @keyframes accordion-down {
    from {
      height: 0;
    }
    to {
      height: var(--radix-accordion-content-height);
    }
  }

  @keyframes accordion-up {
    from {
      height: var(--radix-accordion-content-height);
    }
    to {
      height: 0;
    }
  }

And also added some of utilities directives:

@utility animate-accordion-down {
  animation: accordion-down 0.2s ease-out;
}

@utility animate-accordion-up {
  animation: accordion-up 0.2s ease-out;
}

My full CSS according to this changes:

@import "tailwindcss";
@plugin "tw-animate-css";

@custom-variant dark (&:is(.dark *));

:root {
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.145 0 0);
  --primary: oklch(0.205 0 0);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.97 0 0);
  --secondary-foreground: oklch(0.205 0 0);
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.97 0 0);
  --accent-foreground: oklch(0.205 0 0);
  --destructive: oklch(0.577 0.245 27.325);
  --destructive-foreground: oklch(0.577 0.245 27.325);
  --border: oklch(0.922 0 0);
  --input: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);
  --radius: 0.625rem;
}

@theme inline {
  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --color-card: var(--card);
  --color-card-foreground: var(--card-foreground);
  --color-popover: var(--popover);
  --color-popover-foreground: var(--popover-foreground);
  --color-primary: var(--primary);
  --color-primary-foreground: var(--primary-foreground);
  --color-secondary: var(--secondary);
  --color-secondary-foreground: var(--secondary-foreground);
  --color-muted: var(--muted);
  --color-muted-foreground: var(--muted-foreground);
  --color-accent: var(--accent);
  --color-accent-foreground: var(--accent-foreground);
  --color-destructive: var(--destructive);
  --color-destructive-foreground: var(--destructive-foreground);
  --color-border: var(--border);
  --color-input: var(--input);
  --color-ring: var(--ring);
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);
}

@layer base {
  * {
    @apply border-border outline-ring/50;
  }
  body {
    @apply bg-background text-foreground;
  }

  @keyframes accordion-down {
    from {
      height: 0;
    }
    to {
      height: var(--radix-accordion-content-height);
    }
  }

  @keyframes accordion-up {
    from {
      height: var(--radix-accordion-content-height);
    }
    to {
      height: 0;
    }
  }
}

@utility animate-accordion-down {
  animation: accordion-down 0.2s ease-out;
}

@utility animate-accordion-up {
  animation: accordion-up 0.2s ease-out;
}

[bernaferrari]

I think you should use @import "tw-animate-css"; (and pnpm install it) instead of tailwindcss-animate which doesn't support Tailwind 4.

It is interesting the official shadcn v4 sample has the @keyframes but don't have the @utlity, I wonder how it works. Thanks. It wouldn't work without the utility.

[omaroubari]

Faced a similar issue but I think it wasn't caused by shadcn. I was migrating from tailwind v3.4 and I fixed it by adding the animation and keyframe definitions to @theme. Make sure to double-check the syntax, as I forgot the colons after 'from' and 'to' and wasted about an hour debugging.

@theme inline {
  @keyframes accordion-down {
      from {
        height: 0;
      }
      to {
        height: var(--radix-accordion-content-height);
      }
    }
    @keyframes accordion-up {
      from {
        height: var(--radix-accordion-content-height);
      }
      to {
        height: 0;
      }
    }
}

[dlhck]

@agi-v0 I started from scratch with Tailwind v4 and shadcn@canary. So it was missing the animations in that case.

[kein-1]

@ilyahahaha 's solution worked for me. Thanks!