Font Size

Usage

Control the font size of an element using the text-{size} utilities.

Responsive

To control the font size of an element at a specific breakpoint, add a {screen}: prefix to any existing font size utility. For example, use md:text-lg to apply the text-lg utility at only medium screen sizes and above.

<p class="text-base md:text-lg ...">The quick brown fox jumps over the lazy dog.</p>

For more information about Tailwind’s responsive design features, check out the Responsive Design documentation.

Customizing

Font Sizes

By default, Tailwind provides 10 font-size utilities. You change, add, or remove these by editing the theme.fontSize section of your Tailwind config.

  // tailwind.config.js
  module.exports = {
    theme: {
      fontSize: {
-       'xs': '.75rem',
-       'sm': '.875rem',
+       'tiny': '.875rem',
        'base': '1rem',
        'lg': '1.125rem',
        'xl': '1.25rem',
        '2xl': '1.5rem',
-       '3xl': '1.875rem',
-       '4xl': '2.25rem',
        '5xl': '3rem',
        '6xl': '4rem',
+       '7xl': '5rem',
      }
    }
  }

Providing a default line-height

You can provide a default line-height for each of your font-sizes using a tuple of the form [fontSize, lineHeight] in your tailwind.config.js file.

// tailwind.config.js
module.exports = {
  theme: {
    fontSize: {
      sm: ['14px', '20px'],
      base: ['16px', '24px'],
      lg: ['20px', '28px'],
      xl: ['24px', '32px'],
    }
  }
}

You can also specify a default line-height using object syntax:

// tailwind.config.js
module.exports = {
  theme: {
    fontSize: {
      sm: ['14px', {
        lineHeight: '20px',
      }],
    }
  }
}

We already provide default line heights for each .text-{size} class.

Providing a default letter-spacing

If you also want to provide a default letter-spacing value for a font size, you can do so using a tuple of the form [fontSize, { letterSpacing, lineHeight }] in your tailwind.config.js file.

// tailwind.config.js
module.exports = {
  theme: {
    fontSize: {
      '2xl': ['24px', {
        letterSpacing: '-0.01em',
      }],
      // Or with a default line-height as well
      '3xl': ['32px', {
        letterSpacing: '-0.02em',
        lineHeight: '40px',
      }],
    }
  }
}

Variants

默認情況下, 只有 響應式 的 text sizing 變化模式 (variants) 會產生。

在 tailwind.config.js 的 variants 區塊中變更 fontSize 屬性來決定有哪些變化模式會生成。

舉個例子來說，這個設定將會生成 響應式 和 hover 的變化模式。

  // tailwind.config.js
  module.exports = {
    variants: {
      extend: {
        // ...
+       fontSize: ['responsive', 'hover'],
      }
    }
  }

Disabling

如果你不打算在專案中使用 text sizing 功能，可以在你的設定檔裡的 corePlugins 屬性中將 fontSize 設定為 false 來停用功能：

  // tailwind.config.js
  module.exports = {
    corePlugins: {
      // ...
+     fontSize: false,
    }
  }