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CSS Mixins Playground - Interactive CSS Lab | IconVault

Write native CSS @mixin blocks with parameters and apply them with @apply. Live preview, JS fallback, copyable CSS. Free, in your browser.

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CSS Mixins Playground

Native @mixin blocks with parameters, applied live

5 of 5 free uses left

Mixin name

@mixin

Parameters

Mixin body

Reference params with var(--name).

Apply with different arguments

Primary card

Styled by @apply with the arguments below.

.mixin-target-a { @apply --card(...); }

Alert card

Styled by @apply with the arguments below.

.mixin-target-b { @apply --card(...); }

Clear an argument to fall back to the parameter default. Unlike Sass mixins, native @mixin runs in the browser, so it can read var(), container queries and the cascade.

Copy the CSS

@mixin card(--bg: #ffffff, --border: #e2e8f0, --radius: 14px, --pad: 18px) {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--pad);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.mixin-target-a {
  @apply --card(#f0fdfa, #99f6e4, 18px, 22px);
}

.mixin-target-b {
  @apply --card(#fef2f2, #fecaca, 8px, 14px);
}

5 of 5 free copies left.

About this tool

IconVault's CSS Mixins Playground is a hands-on lab for native CSS @mixin and @apply. Name your mixin, add parameters with defaults, write the body with var() references, then apply it to two cards with different arguments and watch both restyle live. The page generates the real @mixin/@apply code as you type, ready to copy into any project. It is free and runs fully in your browser.

Native mixins bring Sass-style reuse to the browser with superpowers preprocessors never had: because they run at render time, mixin bodies can read custom properties, respond to container queries, and participate in the cascade. The playground feature-detects support and runs the genuine @mixin engine on Chrome 133+ and Edge 133+, while older browsers get a pixel-faithful JavaScript expansion so the learning never stops. Parameters with defaults make one mixin serve many variants without repetition.

Frequently asked questions

Popular searches

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