@css-system/use-css

css-system/use-css

A react hook for building versatile design primitives.

Example

import React, {createContext, useContext} from "react"
import ReactDOM from "react-dom"
import {useCss} from "@css-system/use-css"

const theme = {
  breakpoints: ["40em", "52em", "64em"],
  colors: {
    background: "#ffffff",
    text: "#000000",
    primary: "#ff0000",
  },
  space: [0, 4, 8, 16, 32],
  fontSizes: [0, 12, 14, 16, 20, 24, 32, 48, 64, 72],
}

const ThemeContext = createContext(theme)

const View = ({as: Component = "div", css, ...props}) => {
  const theme = useContext(ThemeContext)
  const className = useCss(
    {
      display: "flex",
      minWidth: 0,
      minHeight: 0,
      flex: "none",
      alignSelf: "auto",
      alignItems: "stretch",
      flexDirection: "column",
      justifyContent: "flex-start",
      ...css,
    },
    theme
  )

  return <Component className={className} {...props} />
}

const Text = ({as: Component = "span", css, ...props}) => {
  const theme = useContext(ThemeContext)
  const className = useCss(
    {
      display: "inline-flex",
      minWidth: 0,
      minHeight: 0,
      flex: "none",
      alignSelf: "auto",
      alignItems: "stretch",
      flexDirection: "row",
      justifyContent: "flex-start",
      ...css,
    },
    theme
  )

  return <Component className={className} {...props} />
}

const App = () => {
  return (
    <View
      css={{
        p: [1, 2, 3],
        "&:hover": {
          bg: "text",
          color: "background",
        },
      }}
    >
      <Text css={{fontSize: [1, 2, 3]}}>Hello world !</Text>
    </View>
  )
}