coss — 28 React Components, Preview & Copy | 21st.dev

coss

coss

Open-source React UI component library built on Base UI; the official design system of Cal.com.

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coss components

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Input OTP

Progress

Progress

Progress

Progress

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Slider

Spinner

Spinner

Spinner

Spinner

Spinner

Spinner

Switch

Switch

Switch

Switch

Components
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coss
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coss

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About coss

coss is a component library on 21st.dev by coss with 28 public React components. Every component ships with a live interactive preview and full TSX source — copy the code, install it through the shadcn CLI, or pull it into Cursor or Claude Code over MCP.

All 28 coss components

Accordion
Alert
Alert Dialog
Avatar
Badge
Breadcrumb
Breadcrumb
Button
Calendar
Checkbox
Checkbox Group
Collapsible
Combobox

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