adding media queries in tailwind css code example

Example 1: manage breakpoinit in trailwind

@screen md {
  // whatever
}

Example 2: tailwind breakpoint

// tailwind.config.js
module.exports = {
  theme: {
    screens: {
      'sm': '640px',
      // => @media (min-width: 640px) { ... }

      'md': '768px',
      // => @media (min-width: 768px) { ... }

      'lg': '1024px',
      // => @media (min-width: 1024px) { ... }

      'xl': '1280px',
      // => @media (min-width: 1280px) { ... }

      '2xl': '1536px',
      // => @media (min-width: 1536px) { ... }
    }
  }
}

Example 3: what is md in tailwind css

// tailwind.config.js
module.exports = {
  theme: {
    screens: {
      'sm': '500px',
      'md': [
        // Sidebar appears at 768px, so revert to `sm:` styles between 768px
        // and 868px, after which the main content area is wide enough again to
        // apply the `md:` styles.
        {'min': '668px', 'max': '767px'},
        {'min': '868px'}
      ],
      'lg': '1100px',
      'xl': '1400px',
    }
  }
}