xy-postcss-px-to-viewport
v2.0.1
Published
A CSS post-processor that converts px to viewport units (vw, vh, vmin, vmax).
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xy-postcss-px-to-viewport
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A plugin for PostCSS that generates viewport units (vw, vh, vmin, vmax) from pixel units.
Support include configuration
Demo
If your project involves a fixed width, this script will help to convert pixels into viewport units.
Input
.class {
margin: -10px .5vh;
padding: 5vmin 9.5px 1px;
border: 3px solid black;
border-bottom-width: 1px;
font-size: 14px;
line-height: 20px;
}
.class2 {
border: 1px solid black;
margin-bottom: 1px;
font-size: 20px;
line-height: 30px;
}
@media (min-width: 750px) {
.class3 {
font-size: 16px;
line-height: 22px;
}
}
Output
.class {
margin: -1.33333vw .5vh;
padding: 5vmin 1.26667vw 1px;
border: 0.4vw solid black;
border-bottom-width: 1px;
font-size: 1.86667vw;
line-height: 2.66667vw;
}
.class2 {
border: 1px solid black;
margin-bottom: 1px;
font-size: 2.66667vw;
line-height: 4vw;
}
@media (min-width: 750px) {
.class3 {
font-size: 16px;
line-height: 22px;
}
}
Getting Started
Installation
Add via npm
$ npm install xy-postcss-px-to-viewport --save-dev
or yarn
$ yarn add -D xy-postcss-px-to-viewport
Use with PostCss configuration file
add to your postcss.config.js
module.exports = {
plugins: {
// ...
'xy-postcss-px-to-viewport': {
// options
},
},
}
Usage
Default Options:
{
unitToConvert: 'px',
viewportUnit: 'vw',
fontViewportUnit: 'vw',
viewportWidth: 750,
unitPrecision: 5,
minPixelValue: 1,
selectorBlackList: [],
propList: ['*'],
mediaQuery: false,
replace: true,
exclude: undefined,
include: undefined,
landscape: false,
landscapeUnit: 'vw',
landscapeWidth: 425
}
unitToConvert
(String) unit to convert, by default, it is px.viewportWidth
(Number) The width of the viewport.unitPrecision
(Number) The decimal numbers to allow the vw units to grow to.propList
(Array) The properties that can change from px to vw.- Values need to be exact matches.
- Use wildcard _ to enable all properties. Example: ['_']
- Use * at the start or end of a word. (['*position*'] will match background-position-y)
- Use ! to not match a property. Example: ['*', '!letter-spacing']
- Combine the "not" prefix with the other prefixes. Example: ['', '!font']
viewportUnit
(String) Expected units.fontViewportUnit
(String) Expected units for font.selectorBlackList
(Array) The selectors to ignore and leave as px.- If value is string, it checks to see if selector contains the string.
['body']
will match.body-class
- If value is regexp, it checks to see if the selector matches the regexp.
[/^body$/]
will matchbody
but not.body
- If value is string, it checks to see if selector contains the string.
minPixelValue
(Number) Set the minimum pixel value to replace.mediaQuery
(Boolean) Allow px to be converted in media queries.replace
(Boolean) replaces rules containing vw instead of adding fallbacks.exclude
(Regexp or Array of Regexp) Ignore some files like 'node_modules'- If value is regexp, will ignore the matches files.
- If value is array, the elements of the array are regexp.
include
(Regexp or Array of Regexp) Ifinclude
is set, only matching files will be converted, for example, only files undersrc/mobile/
(include: /\/src\/mobile\//
)- If the value is regexp, the matching file will be included, otherwise it will be excluded.
- If value is array, the elements of the array are regexp.
landscape
(Boolean) Adds@media (orientation: landscape)
with values converted vialandscapeWidth
.landscapeUnit
(String) Expected unit forlandscape
optionlandscapeWidth
(Number) Viewport width for landscape orientation.
exclude
andinclude
can be set together, and the intersection of the two rules will be taken.
Ignoring
You can use special comments for ignore conversion of single lines:
/* px-to-viewport-ignore-next */
— on a separate line, prevents conversion on the next line./* px-to-viewport-ignore */
— after the property on the right, prevents conversion on the same line.
Example:
/* example input: */
.class {
/* px-to-viewport-ignore-next */
width: 10px;
padding: 10px;
height: 10px; /* px-to-viewport-ignore */
border: solid 2px #000; /* px-to-viewport-ignore */
}
/* example output: */
.class {
width: 10px;
padding: 1.33333vw;
height: 10px;
border: solid 2px #000;
}
There are several more reasons why your pixels may not convert, the following options may affect this:
propList
, selectorBlackList
, minPixelValue
, mediaQuery
, exclude
, include
.
Use with gulp-postcss
add to your gulpfile.js
:
var gulp = require('gulp')
var postcss = require('gulp-postcss')
var pxtoviewport = require('xy-postcss-px-to-viewport')
gulp.task('css', function () {
var processors = [
pxtoviewport({
viewportWidth: 320,
viewportUnit: 'vmin',
}),
]
return gulp.src(['build/css/**/*.css']).pipe(postcss(processors)).pipe(gulp.dest('build/css'))
})
Contributing
Please read Code of Conduct and Contributing Guidelines for submitting pull requests to us.
Running the tests
In order to run tests, you need to install dev-packages:
$ npm install
Then run the tests via npm script:
$ npm run test
Changelog
The changelog is here.
Versioning
We use SemVer for versioning. For the versions available, see the tags on this repository.
License
This project is licensed under the MIT License.
Acknowledgments
- From [evrone]( https://github.com/evrone )[postcss px to viewport]( https://github.com/evrone/postcss-px-to-viewport )The master branch of;
- Because it does not upload the code containing the 'include' function in 'npm'; So upload it by yourself