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Why isn't my @supports query applying styles in older browsers that don't support the feature?

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Why isn't my @supports query applying styles in older browsers that don't support the feature?

Asked on Dec 10, 2025

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The `@supports` rule is used to apply styles only if a browser supports a specific CSS feature. However, older browsers that don't recognize the `@supports` rule will ignore it entirely, which means they won't apply the styles inside it.

Example Concept: The `@supports` rule allows you to write conditional CSS based on feature support. If a browser doesn't support `@supports`, it will skip the entire block. To ensure styles are applied in older browsers, you should provide a fallback style outside the `@supports` block, which will be used if the feature isn't supported.

Additional Comment:

Place fallback styles outside the `@supports` block to ensure they are applied in all browsers.
Use `@supports` to enhance styles for browsers that support the feature, not as a sole styling method.
Consider using feature detection libraries like Modernizr for more complex scenarios.

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Why isn't my @supports query applying styles in older browsers that don't support the feature?

Asked on Dec 10, 2025

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