FluidSizingCSS is a pioneering solution for responsive design that transforms how interfaces adapt between mobile and desktop. This package offers the world's first pure CSS implementation of fluid sizing locks, eliminating the need for SCSS or external tools. Designed for developers and loved by designers, it enables perfect fluid scaling using only native CSS, making your site more adaptable, lighter, and faster.
Tip
See the FluidSizingCSS Demo on CodePen.
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Install FluidSizingCSS:
npm install fluidsizingcss
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Import the CSS file into your project based on the framework you’re using:
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React: Import in your JavaScript/TypeScript file:
import 'fluidsizingcss/all';
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Vue.js: Import in your entry file:
import 'fluidsizingcss/all';
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Angular: Add to the
stylesarray inangular.json:"styles": [ "node_modules/fluidsizingcss/dist/fluidsizingcss.min.css", "src/styles.css" ]
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HTML/Vanilla JavaScript: Add to your HTML
<head>:<link rel="stylesheet" href="node_modules/fluidsizingcss/dist/fluidsizingcss.min.css">
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SASS/SCSS: Import in your main SASS/SCSS file:
@import 'node_modules/fluidsizingcss/dist/fluidsizingcss.min.css';
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To improve performance, you can choose specialized versions of FluidSizingCSS:
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Logical Properties Only (e.g.,
block-size,inline-size):import 'fluidsizingcss/logical';
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Physical Properties Only (e.g.,
height,width):import 'fluidsizingcss/physical';
Alternatively, include FluidSizingCSS directly in your HTML:
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Full Version:
<link rel="stylesheet" href="https://unpkg.com/fluidsizingcss@latest/dist/fluidsizingcss.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/fluidsizingcss@latest/dist/fluidsizingcss.min.css">
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Logical Properties Only:
<link rel="stylesheet" href="https://unpkg.com/fluidsizingcss@latest/dist/fluidsizingcss-logical.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/fluidsizingcss@latest/dist/fluidsizingcss-logical.min.css">
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Physical Properties Only:
<link rel="stylesheet" href="https://unpkg.com/fluidsizingcss@latest/dist/fluidsizingcss-physical.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/fluidsizingcss@latest/dist/fluidsizingcss-physical.min.css">
The following table provides an overview of the different versions of FluidSizingCSS files, including their standard CSS size, minified size, and the size after Brotli compression. This information helps you understand the trade-offs between file size and performance optimization in your project.
| File Name | Raw | Minified | Brotli compressed |
|---|---|---|---|
fluidsizingcss.css |
49.22 KB | 38.03 KB | 2.69 KB |
fluidsizingcss-logical.css |
33.56 KB | 25.8 KB | 1.91 KB |
fluidsizingcss-physical.css |
28.12 KB | 21.35 KB | 1.93 KB |
FluidSizingCSS leverages CSS custom properties, calc(), and clamp() to implement fluid sizing techniques. This method enables smooth adaptation of typography and design elements across different devices, avoiding the abrupt changes typically associated with traditional breakpoints.
To define fluid sizing for a heading, include the following in your CSS:
Caution
All values must be unitless to ensure compatibility with CSS mathematical operations.
:root {
--s-min: 400; /* Lower Lock: Min Screen Size */
--s-max: 1400; /* Upper Lock: Max Screen Size */
}
h1 {
font-size: var(--fs);
--fs-min: 60; /* Minimum Font Size */
--fs-max: 240; /* Maximum Font Size */
line-height: var(--lh);
--lh-min: 60; /* Minimum Line-Height */
--lh-max: 240; /* Maximum Line-Height */
}Set global minimum and maximum screen sizes and base font size at the :root level:
@layer fluid, base;
@layer base {
:root {
--s-min: 400; /* Screen Size Min for General Fluid Sizing */
--s-max: 1400; /* Screen Size Max for General Fluid Sizing */
--rem: 16; /* Pixel per REM for General Fluid Sizing */
}
}FluidSizingCSS provides a comprehensive set of fluid properties, allowing you to create responsive and adaptive designs across different screen sizes. These properties are categorized into
- Common Fluid Properties,
- Logical Fluid Properties and
- Physical Fluid Properties.
These are general properties like margins, padding, and text formatting that apply universally, ensuring consistent fluid responsiveness across your design.
- font-size:
--fs - line-height:
--lh - letter-spacing:
--ls - word-spacing:
--ws - text-indent:
--ti - text-decoration-thickness:
--tdt - text-underline-offset:
--tuo
- margin:
--m
- padding:
--p
- border-width:
--bw
- border-radius:
--br
- outline-width:
--ow - outline-offset:
--oo
- inset:
--i
- grid-auto-columns:
--gac - grid-auto-rows:
--gar - gap:
--g - column-gap:
--cg - row-gap:
--rg - column-width:
--cw - column-rule-width:
--crw - flex-basis:
--fb
- background-position-x:
--bpx - background-position-y:
--bpy
- scroll-margin:
--sm - scroll-padding:
--sp
These properties adjust layout dimensions and spacing using logical directions (e.g., block, inline) relative to writing modes, enhancing adaptability across different content flows.
- block-size:
--bs - min-block-size:
--minbs - max-block-size:
--maxbs
- inline-size:
--is - min-inline-size:
--minis - max-inline-size:
--maxis
- margin-block:
--mb - margin-block-start:
--mbs - margin-block-end:
--mbe - margin-inline:
--mi - margin-inline-start:
--mis - margin-inline-end:
--mie
- padding-block:
--pb - padding-block-start:
--pbs - padding-block-end:
--pbe - padding-inline:
--pi - padding-inline-start:
--pis - padding-inline-end:
--pie
- border-block-width:
--bbw - border-block-start-width:
--bbsw - border-block-end-width:
--bbew - border-inline-width:
--biw - border-inline-start-width:
--bisw - border-inline-end-width:
--biew
- border-start-start-radius:
--bssr - border-start-end-radius:
--bser - border-end-end-radius:
--beer - border-end-start-radius:
--besr
- inset-block:
--ib - inset-block-start:
--ibs - inset-block-end:
--ibe - inset-inline:
--ii - inset-inline-start:
--iis - inset-inline-end:
--iie
- scroll-margin-block:
--smb - scroll-margin-block-start:
--smbs - scroll-margin-block-end:
--smbe - scroll-margin-inline:
--smi - scroll-margin-inline-start:
--smis - scroll-margin-inline-end:
--smie - scroll-padding-block:
--spb - scroll-padding-block-start:
--spbs - scroll-padding-block-end:
--spbe - scroll-padding-inline:
--spi - scroll-padding-inline-start:
--spis - scroll-padding-inline-end:
--spie
These properties control physical dimensions (e.g., height, width) and positions (e.g., top, left) based on the viewport, allowing precise fluid scaling of elements.
- height:
--h - min-height:
--minh - max-height:
--maxh
- width:
--w - min-width:
--minw - max-width:
--maxw
- margin-top:
--mt - margin-bottom:
--mgb - margin-left:
--ml - margin-right:
--mr
- padding-top:
--pt - padding-bottom:
--pb - padding-left:
--pl - padding-right:
--pr
- border-top-width:
--btw - border-bottom-width:
--bbwth - border-left-width:
--blw - border-right-width:
--bbrw
- border-top-left-radius:
--btlr - border-top-right-radius:
--btrr - border-bottom-right-radius:
--bbrr - border-bottom-left-radius:
--bblr
- top:
--top - bottom:
--bot - left:
--lft - right:
--rgt
- scroll-margin-top:
--smt - scroll-margin-bottom:
--smb - scroll-margin-left:
--sml - scroll-margin-right:
--smr - scroll-padding-top:
--spt - scroll-padding-bottom:
--spbt - scroll-padding-left:
--spl - scroll-padding-right:
--spr
FluidSizingCSS is licensed under the MIT License.