🚨 Tailwind CSS 4.0 Not Working on webOS (Smart TVs)

[clovisj]

❌ Issue: Tailwind CSS 4.0 Not Working on webOS (Smart TVs)

Description

After upgrading to Tailwind CSS 4.0, styles are not being properly applied when running on webOS (Smart TVs). This issue did not occur in previous versions (e.g., Tailwind 3.x). The same styles work fine on desktop and mobile browsers, but fail to render correctly on webOS-based browsers.

Expected Behavior

• Tailwind CSS styles should apply normally on webOS browsers, just like in previous versions.

Current Behavior

• No Tailwind styles are being applied.
• Only basic HTML is rendered, as if Tailwind is missing or failing to load.
• Inspecting the DOM shows that Tailwind classes are present, but do not take effect.

Steps to Reproduce

1. Set up a project with Tailwind CSS 4.0.
2. Deploy the app and open it in a webOS browser (e.g., LG Smart TV).
3. Observe that Tailwind styles are not applied.

Technical Details

• Tailwind Version: 4.0.x
• webOS Version: [Specify the exact version]
• Tested on: LG Smart TV [Model]
• Works on Tailwind 3.x: ✅ Yes
• Fails on Tailwind 4.x: ❌ Yes

Potential Causes

• webOS may not fully support certain modern CSS features introduced in Tailwind 4.0.
• The Tailwind JIT compiler may be generating styles that are not compatible with webOS browsers.
• webOS might have issues with CSS variables or newer selector strategies.

Questions & Next Steps

• Are there known CSS limitations in webOS affecting Tailwind 4.0?
• Can a compatibility mode be introduced for older browsers like webOS?
• Is there a recommended workaround to make Tailwind 4.0 work on webOS?

Additional Information

Any insights or potential fixes would be greatly appreciated! Let me know if you need further debugging info or specific logs. Thanks for the amazing work on Tailwind! 🙌

[rozsazoltan]

I think you haven't considered the specified minimum requirements that TailwindCSS v4 has been aligned with to ensure long-term stability for future versions.

• Browser support

Unfortunately, this has rendered many browser versions obsolete, but even so, with 85% coverage, most users are already using modern versions; except perhaps smart TVs, where older browsers may still be quite common.

• [v4] Clarify browser support #14119