npm install postcss-logical --save-dev
PostCSS Logical Properties and Values lets you use logical, rather than physical, direction and dimension mappings in CSS, following the CSS Logical Properties and Values specification.
.element {
block-size: 100px;
max-inline-size: 400px;
inline-size: 200px;
padding-block: 10px 20px;
margin-inline: auto;
border-block-width: 2px;
border-block-style: solid;
}
/* becomes */
.element {
height: 100px;
max-width: 400px;
width: 200px;
padding-top: 10px;
padding-bottom: 20px;
margin-left: auto;
margin-right: auto;
border-top-width: 2px;
border-bottom-width: 2px;
border-top-style: solid;
border-bottom-style: solid;
}Add PostCSS Logical Properties and Values to your project:
npm install postcss postcss-logical --save-devUse it as a PostCSS plugin:
const postcss = require('postcss');
const postcssLogical = require('postcss-logical');
postcss([
postcssLogical(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);The blockDirection and inlineDirection options allow you to specify the direction of the block and inline axes. The default values are top-to-bottom and left-to-right respectively, which would match any latin language.
You should tweak these values so that they are specific to your language and writing mode.
postcssLogical({
blockDirection: 'right-to-left',
inlineDirection: 'top-to-bottom'
}).element {
block-size: 100px;
max-inline-size: 400px;
inline-size: 200px;
padding-block: 10px 20px;
margin-inline: auto;
border-block-width: 2px;
border-block-style: solid;
}
/* becomes */
.element {
width: 100px;
max-height: 400px;
height: 200px;
padding-right: 10px;
padding-left: 20px;
margin-top: auto;
margin-bottom: auto;
border-right-width: 2px;
border-left-width: 2px;
border-right-style: solid;
border-left-style: solid;
}Each direction must be one of the following:
top-to-bottombottom-to-topleft-to-rightright-to-left
You can't mix two vertical directions or two horizontal directions so for example top-to-bottom and right-to-left are valid, but top-to-bottom and bottom-to-top are not.
Please do note that text-align won't be transformed if inlineDirection becomes vertical.