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cva@beta

Variants

Creating Variants

To kick things off, let’s build a “basic” button component, using cva to handle our variant’s classes

components/button.ts
import { cva } from "cva";


const button = cva({
  base: "rounded border font-semibold",
  // **or**
  // base: ["font-semibold", "border", "rounded"],
  variants: {
    intent: {
      primary: "border-transparent bg-blue-500 text-white hover:bg-blue-600",
      // **or**
      // primary: [
      //   "bg-blue-500",
      //   "text-white",
      //   "border-transparent",
      //   "hover:bg-blue-600",
      // ],
      secondary: "border-gray-400 bg-white text-gray-800 hover:bg-gray-100",
    },
    size: {
      small: "px-2 py-1 text-sm",
      medium: "px-4 py-2 text-base",
    },
  },
  compoundVariants: [
    {
      intent: "primary",
      size: "medium",
      class: "uppercase",
      // **or** if you're a React.js user, `className` may feel more consistent:
      // className: "uppercase"
    },
  ],
  defaultVariants: {
    intent: "primary",
    size: "medium",
  },
});


button();
// => "font-semibold border rounded bg-blue-500 text-white border-transparent hover:bg-blue-600 text-base py-2 px-4 uppercase"


button({ intent: "secondary", size: "small" });
// => "font-semibold border rounded bg-white text-gray-800 border-gray-400 hover:bg-gray-100 text-sm py-1 px-2"

Compound Variants

Variants that apply when multiple other variant conditions are met.

components/button.ts
import { cva } from "cva";


const button = cva({
  base: "…",
  variants: {
    intent: { primary: "…", secondary: "…" },
    size: { small: "…", medium: "…" },
  },
  compoundVariants: [
    // Applied via:
    //   `button({ intent: "primary", size: "medium" })`
    {
      intent: "primary",
      size: "medium",
      class: "…",
    },
  ],
});

Targeting Multiple Variant Conditions

components/button.ts
import { cva } from "cva";


const button = cva({
  base: "…",
  variants: {
    intent: { primary: "…", secondary: "…" },
    size: { small: "…", medium: "…" },
  },
  compoundVariants: [
    // Applied via:
    //   `button({ intent: "primary", size: "medium" })`
    //     or
    //   `button({ intent: "secondary", size: "medium" })`
    {
      intent: ["primary", "secondary"],
      size: "medium",
      class: "…",
    },
  ],
});

Disabling Variants

Want to disable a variant completely? Provide an option with a value of null.

If you’re stuck on naming, we recommend setting an explicit "unset" option (similar to the CSS keyword).

import { cva } from "cva";


const button = cva({
  base: "button",
  variants: {
    intent: {
      unset: null,
      primary: "button--primary",
      secondary: "button--secondary",
    },
  },
});


button({ intent: "unset" });
// => "button"