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tailwind-vw-utilities

v2.1.0

Published

Tailwind CSS v4 plugin that automatically converts px values to vw units

Vulnerabilities

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Links

Git

Maintainers

drapondrapon

Keywords

tailwindcsstailwindcssvwviewportresponsiveutilitiesmobile-first

Readme

tailwind-vw-utilities

A Tailwind CSS v4 plugin that automatically converts px values to vw units.

Installation

npm install tailwind-vw-utilities
# or
pnpm add tailwind-vw-utilities

Usage

@import "tailwindcss";
@import "tailwind-vw-utilities";

Basic Usage

Simply specify px values from your design comp, and they will be automatically converted to vw units.

// Before (manual calculation)
className = "mb-[4.2667vw] md:mb-6";
// Calculate 16 ÷ 375 × 100 = 4.2667 every time...

// After (specify px values)
className = "vw-mb-16 md:mb-6";
// Specify px values directly, auto-converted to vw

Changing the Base Width

The default base width is 375px. Override it with a CSS variable:

@import "tailwindcss";
@import "tailwind-vw-utilities";

:root {
  --vw-base: 750; /* Retina design base */
}

Using Presets

@import "tailwindcss";
@import "tailwind-vw-utilities";
@import "tailwind-vw-utilities/presets/retina-750";

Available presets:

  • presets/sp-375 - 375px base (default)
  • presets/retina-750 - 750px base (for Retina designs)
  • presets/desktop - Desktop variable definitions

Multiple Base Widths (SP / PC)

Use vw-base-* to switch the base width per breakpoint — like Tailwind's dark mode pattern, set context on a parent and children inherit it.

// Set base width on a parent element with responsive variants
<body className="vw-base-750 lg:vw-base-1536">
  {/* SP: 8/750×100vw, PC(lg+): 16/1536×100vw */}
  <div className="vw-gap-8 lg:vw-gap-16">
    <h1 className="vw-text-28 lg:vw-text-48">Title</h1>
  </div>

  {/* Switch to fixed values on PC */}
  <div className="vw-p-20 lg:p-5">Content</div>
</body>

vw-base-* accepts any integer, so you can use any design comp width:

<div className="vw-base-375">   {/* 375px base */}
<div className="vw-base-750">   {/* 750px (Retina) base */}
<div className="vw-base-1440">  {/* 1440px base */}
<div className="vw-base-1536">  {/* 1536px base */}

Note: At each base width, vw-gap-8 always resolves to exactly 8px (proportional scaling). When the base switches at a breakpoint, values may jump — this is the same behavior as any responsive layout change. Use explicit overrides like vw-gap-8 lg:vw-gap-16 when your SP and PC designs specify different px values.

Available Utilities

Base Width

| Class | Description | | ----------- | ------------------------------------------ | | vw-base-* | Override --vw-base on element & children |

Margin

| Class | Description | | ---------------------------------------------- | --------------------------- | | vw-m-* | margin | | vw-mx-* | margin-inline (horizontal) | | vw-my-* | margin-block (vertical) | | vw-mt-* | margin-top | | vw-mr-* | margin-right | | vw-mb-* | margin-bottom | | vw-ml-* | margin-left | | vw-ms-* | margin-inline-start | | vw-me-* | margin-inline-end | | -vw-m-* | negative margin | | -vw-mt-*, -vw-mr-*, -vw-mb-*, -vw-ml-* | negative individual margins |

Padding

| Class | Description | | --------- | --------------------------- | | vw-p-* | padding | | vw-px-* | padding-inline (horizontal) | | vw-py-* | padding-block (vertical) | | vw-pt-* | padding-top | | vw-pr-* | padding-right | | vw-pb-* | padding-bottom | | vw-pl-* | padding-left | | vw-ps-* | padding-inline-start | | vw-pe-* | padding-inline-end |

Gap

| Class | Description | | ------------ | ----------- | | vw-gap-* | gap | | vw-gap-x-* | column-gap | | vw-gap-y-* | row-gap |

Width / Height

| Class | Description | | ------------ | -------------- | | vw-w-* | width | | vw-min-w-* | min-width | | vw-max-w-* | max-width | | vw-h-* | height | | vw-min-h-* | min-height | | vw-max-h-* | max-height | | vw-size-* | width & height |

Font Size

| Class | Description | | -------------- | ----------- | | vw-text-* | font-size | | vw-leading-* | line-height |

Position

| Class | Description | | -------------------------------------------------------- | ------------------ | | vw-inset-* | inset (all sides) | | vw-inset-x-* | left & right | | vw-inset-y-* | top & bottom | | vw-top-* | top | | vw-right-* | right | | vw-bottom-* | bottom | | vw-left-* | left | | vw-start-* | inset-inline-start | | vw-end-* | inset-inline-end | | -vw-top-*, -vw-right-*, -vw-bottom-*, -vw-left-* | negative values |

Border Radius

| Class | Description | | -------------------------------------------------------------------------- | ------------------ | | vw-rounded-* | border-radius | | vw-rounded-t-* | top corners | | vw-rounded-r-* | right corners | | vw-rounded-b-* | bottom corners | | vw-rounded-l-* | left corners | | vw-rounded-tl-*, vw-rounded-tr-*, vw-rounded-br-*, vw-rounded-bl-* | individual corners |

Border Width

| Class | Description | | ------------------------------------------------------------------ | ---------------- | | vw-border-* | border-width | | vw-border-t-*, vw-border-r-*, vw-border-b-*, vw-border-l-* | individual sides |

Transform

| Class | Description | | ---------------------------------------- | --------------- | | vw-translate-x-* | translateX | | vw-translate-y-* | translateY | | -vw-translate-x-*, -vw-translate-y-* | negative values |

Scroll Margin / Padding

| Class | Description | | ---------------------------------------------------------------------- | -------------- | | vw-scroll-m-*, vw-scroll-mx-*, vw-scroll-my-* | scroll-margin | | vw-scroll-mt-*, vw-scroll-mr-*, vw-scroll-mb-*, vw-scroll-ml-* | individual | | vw-scroll-p-*, vw-scroll-px-*, vw-scroll-py-* | scroll-padding | | vw-scroll-pt-*, vw-scroll-pr-*, vw-scroll-pb-*, vw-scroll-pl-* | individual |

Space Between

| Class | Description | | -------------- | ---------------------------------- | | vw-space-x-* | horizontal margin between children | | vw-space-y-* | vertical margin between children |

Flexbox

| Class | Description | | ------------ | ----------- | | vw-basis-* | flex-basis |

Typography

| Class | Description | | ----------------------- | ------------------------- | | vw-tracking-* | letter-spacing | | -vw-tracking-* | negative letter-spacing | | vw-indent-* | text-indent | | -vw-indent-* | negative text-indent | | vw-decoration-* | text-decoration-thickness | | vw-underline-offset-* | text-underline-offset |

Outline

| Class | Description | | ---------------------- | ----------------------- | | vw-outline-* | outline-width | | vw-outline-offset-* | outline-offset | | -vw-outline-offset-* | negative outline-offset |

Ring

| Class | Description | | ------------------ | ----------------------- | | vw-ring-* | ring-width (box-shadow) | | vw-ring-offset-* | ring-offset-width |

Divide

| Class | Description | | --------------- | ---------------------------------- | | vw-divide-x-* | vertical border between children | | vw-divide-y-* | horizontal border between children |

Border Radius (Logical Properties)

| Class | Description | | ----------------- | ------------------ | | vw-rounded-s-* | start-side corners | | vw-rounded-e-* | end-side corners | | vw-rounded-ss-* | start-start corner | | vw-rounded-se-* | start-end corner | | vw-rounded-ee-* | end-end corner | | vw-rounded-es-* | end-start corner |

Table

| Class | Description | | ----------------------- | ------------------------- | | vw-border-spacing-* | border-spacing | | vw-border-spacing-x-* | horizontal border-spacing | | vw-border-spacing-y-* | vertical border-spacing |

SVG

| Class | Description | | ------------- | ------------ | | vw-stroke-* | stroke-width |

Examples

// Mobile-first example
<div className="vw-p-16 vw-mb-24 md:p-6 md:mb-8">
  <h1 className="vw-text-32 md:text-2xl">Title</h1>
  <p className="vw-mt-12 md:mt-4">Content</p>
</div>

// With flexbox
<div className="flex vw-gap-16 md:gap-6">
  <div className="vw-w-100">Item 1</div>
  <div className="vw-w-100">Item 2</div>
</div>

// Absolute positioning
<div className="relative">
  <div className="absolute vw-top-10 vw-right-10">
    Positioned element
  </div>
</div>

Conversion Formula

vw value = px value / base width × 100vw

Example: vw-mb-16 (base width 375px)
→ margin-bottom: calc(16 / 375 * 100vw)
→ margin-bottom: 4.2667vw

Responsive Design

Combine with Tailwind breakpoints:

// Mobile: vw-based layout
// Tablet and up: switch to fixed values
<div className="vw-p-20 vw-text-14 md:p-5 md:text-base">Content</div>

Requirements

  • Tailwind CSS v4.0.0 or higher

License

MIT