Button

Create a simple button component with variants.

<button
  sx={{
    appearance: 'none',
    display: 'inline-block',
    textAlign: 'center',
    lineHeight: 'inherit',
    textDecoration: 'none',
    fontSize: 'inherit',
    fontWeight: 'bold',
    m: 0,
    px: 3,
    py: 2,
    border: 0,
    borderRadius: 4,
    variant: 'buttons.primary',
  }}>
  Button
</button>
<button
  sx={{
    appearance: 'none',
    display: 'inline-block',
    textAlign: 'center',
    lineHeight: 'inherit',
    textDecoration: 'none',
    fontSize: 'inherit',
    fontWeight: 'bold',
    m: 0,
    px: 3,
    py: 2,
    border: 0,
    borderRadius: 4,
    variant: 'buttons.primary',
  }}>
  Button
</button>

/** @jsx jsx */
import { jsx } from 'theme-ui'
const Button = ({
  variant = 'primary',
  ...props
}) =>
  <button
    {...props}
    sx={{
      appearance: 'none',
      display: 'inline-block',
      textAlign: 'center',
      lineHeight: 'inherit',
      textDecoration: 'none',
      fontSize: 'inherit',
      fontWeight: 'bold',
      m: 0,
      px: 3,
      py: 2,
      border: 0,
      borderRadius: 4,
      // pass variant prop to sx
      variant: `buttons.${variant}`,
    }}
  />
export default Button

With the above component, button variants can be defined in theme.buttons.

// example theme
export default {
  colors: {
    text: '#000',
    background: '#fff',
    primary: '#07c',
    secondary: '#639',
    gray: '#555',
  },
  buttons: {
    primary: {
      color: 'background',
      bg: 'primary',
    },
    secondary: {
      color: 'background',
      bg: 'secondary',
    },
    gray: {
      color: 'background',
      bg: 'gray',
    },
  },
}