sass-unitconverter

Convert Anything (almost)

At the moment the following units are supported (please comment if something is wrong/missing):

px, pt, pc, mm, cm, in, em, rem, ex, ch, vw, vh, vmin, vmax,
deg, rad, grad, turn, dpi, dpcm, dppx, s, ms, hz, khz, number,
ratio

Install

## Yarn 
yarn add sass-unitconverter
 
## NPM 
npm install sass-unitconverter
 
## Github Repository 
npm install @black7375/sass-unitconverter

Simple Syntax

Rather than going with the "good" old fromUnit-to-toUnit(fromUnit) syntax this function set is based on toUnit(fromUnit) making it a lot shorter and less cumbersome to maintain – as shown below :-)

       pt-to-px(input);
       pc-to-px(input);
       mm-to-px(input);
       cm-to-px(input);    ==>   px(input);
       in-to-px(input);
       em-to-px(input);
       rem-to-px(input);
       num-to-px(input);

Note!

• In this library, num means pure numbers.(10 => ⭕️, 10px => ❌)

• To allow conversion between relative and absolute lengths em and rem are calculated as pixel values based on $root-font-size and $base-font-size (16px browser default). If you change the base font size of your document – remember to set the $root-font-size and $base-font-size variables accordingly.

• To ease the job of handling compounds the em function takes multiple arguments. Each argument is treated as an em compound and used to calculate the visual size. Example – how to set a visual size of 18px on a class nested in an element with a font-size of 2em:

      .class {
          font-size: em(18px 2em); //  0.5625em;
      }

• If you use unit conversion in relation to the font shorthand syntax be aware that line-height "/" will cause division. To prevent this from happening you can either either interpolate the value or use + to add the pieces together without calculation:

      h2 {
          font:300 #{em(24px)}/3 'Lato', sans-serif;
      }

• $width[vw's basis, break-width], $break-height[vh's basis, break-height] are conditional arguments used when vw($break-width), vh($break-height), vmin($break-width, $break-height), vmax($break-width, $break-height).

      h2 {
          font-size: vw(18px,  $width: 1200px);  // 1.5vw
          font-size: px(1.2vh, $height: 600px);  // 7.2px
          font-size: vmin(18px, 1200px, 600px);  // 3vmin
          font-size: vmax(1.2vh, 1200px, 600px); // 0.6vmax
      }

Conversion Table

Type	Function	Input Units
Absolute length	px($input, $options);	px, pt, pc, mm, cm, in, em, rem, vw, vh, vmin, vmax, number
	pt($input, $options);	ǀǀ
	pc($input, $options);	ǀǀ
	mm($input, $options);	ǀǀ
	cm($input, $options);	ǀǀ
	in($input, $options);	ǀǀ
Relative length	em($input, $options);	ǀǀ
	rem($input, $options);	ǀǀ
	ex($input);	ex, num
	ch($input);	ch, num
	vw($input, $options);	px, pt, pc, mm, cm, in, em, rem, vw, vh, vmin, vmax, number
	vh($input, $options);	ǀǀ
	vmin($input, $options);	ǀǀ
	vmax($input, $options);	ǀǀ
Angle	deg($input);	deg, rad, grad, turn, num
	rad($input);	ǀǀ
	grad($input);	ǀǀ
	turn($input);	ǀǀ
Resulution	dpi($input);	dpi, dpcm, dppx, num
	dpcm($input);	ǀǀ
	dppx($input);	ǀǀ
Time	ms($input);	ms, s, num
	s($input);	ǀǀ
Frequency	hz($input);	Hz, kHz, num
	khz($input);	ǀǀ
String	str($input); string($input);	Anything not null
Number	num($input); number($input);	px, pt, pc, mm, cm, in, em, rem, ex, ch,vw, vh, vmin, vmax, deg, rad, grad, turn,dpi, dpcm, dppx, s, ms, hz, khz, num, string
	int($input);	ǀǀ
	uint($input);	ǀǀ
Etc	one-unit($input);	px, pt, pc, mm, cm, in, em, rem, ex, ch,vw, vh, vmin, vmax, deg, rad, grad, turn,dpi, dpcm, dppx, s, ms, hz, khz, num
	to-unit($input, $unit, $options);	ǀǀ
	to-unit-list($input, $unit, $options);	ǀǀ
	to-unit-map($input, $unit, $options);	ǀǀ
	to-unit-data($input, $unit, $options);	ǀǀ

Check Unit

• You can check unit & types with is-[unit]($input)

• Types: null, bool, color, list, map, color, calc, exist

• However, there is a strict mode for num, null, exist.(Default value is true)

      is-px(16px);         // true;
      is-px(16pt);         // false;
 
      is-num(16,    true); // true;
      is-num(16px,  true); // false;
      is-num(16px, false); // true;
 
      is-null(null, true); // true;
      is-null((),   true); // false;
      is-null('',   true); // false;
      is-null((),  false); // true;
      is-null('',  false); // true;
 
      is-exist($exist-var,  true); // true;
      is-exist($true-var,  false); // true;
      is-exist($false-var, false); // false;

• is-equal($inputA, $inputB): Checks if two values are equal.

Cive it a try on: Codepen(Try menu View Compiled CSS)

Options

API	Description	Default	Types	Global Variable	Scoped Key
root-size	rem based size	16px	px, pt, pc, mm, cm, in, em, rem	$root-font-size	root root-size size-root
base-size	em based size	16px	px, pt, pc, mm, cm, in, em, rem	$base-font-size	base base-size size-base
width	screen width	1200px	px, pt, pc, mm, cm, in, em, rem	$unit-width	width width-size size-width
height	screen height	800px	px, pt, pc, mm, cm, in, em, rem	$unit-height	height height-size size-height
callack	check if conversion is possible	null	null Function ($input, $unit, $options) => Boolean's name	$check-callback	callback

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The MIT License (MIT) Copyright (c) 2016 Jakob Eriksen

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.