postcss-start-to-end
v1.0.1
Published
PostCSS plugin that lets you control your layout (ltr or rtl) through logical rather than physical rules
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PostCSS Start To End
PostCSS plugin that lets you control your layout (ltr
or rtl
) through logical rather than direction / physical rules.
Inspired by Flexbox and CSS Grid syntax, use start
or end
to output left
or right
depending on document direction (rtl
or ltr
).
Input
.foo {
padding-start: 1rem;
border-end: 1rem solid teal;
}
Output
.foo {
padding-left: 1rem;
border-right: 1rem solid teal;
}
Usage
postcss([
require('postcss-start-to-end'),
require('postcss-reporter') // show warnings - check options to know more
])
With some options
postcss([
require('postcss-start-to-end')({
direction: 'RTL',
warnings: false,
}),
require('postcss-reporter')
]);
Options
direction
Default writing mode of CSS.
Type: string
Default: 'LTR'
Values: 'LTR'
, 'RTL'
Input
.item {
border-start: 1px solid teal;
padding: 0 3rem 0 0;
}
output with direction: 'LTR'
.item {
border-left: 1px solid teal;
padding: 0 3rem 0 0;
}
output with direction: 'RTL'
.item {
border-right: 1px solid teal;
padding: 0 0 0 3rem;
}
warnings
Output on CLI warnings about properties / rules found that don't follow start-to-end syntax.
Type: boolean
Default: true
Values: true
, false
Example
.item {
margin-left: 10%;
}
Console warning if direction: ltr:
margin-left: 10%; found on line 2. Replace it by
margin-start
to support LTR and RTL directions.
Console warning if direction: rtl:
margin-left: 10%; found on line 2. Replace it by
margin-end
to support LTR and RTL directions.
ignoreNodeModules
Ignore any CSS file inside /node_modules
folder.
Type: boolean
Default: true
Values: true
, false
Rules supported
| Input | Output LTR | output RTL | | ----------------------- | ----------------------- | ----------------------- | | Alignment | | | | text-align: start; | text-align: left; | text-align: right; | | text-align: end; | text-align: right; | text-align: left; | | Clear | | | | clear: start; | clear: left; | clear: right; | | clear: end; | clear: right; | clear: left; | | Float | | | | float: start; | float: left; | float: right; | | float: end; | float: right; | float: left; | | Border | | | | border-start | border-left | border-right | | border-end | border-right | border-left | | border-top-start | border-top-left | border-top-right | | border-top-end | border-top-right | border-top-left | | border-bottom-end | border-bottom-right | border-bottom-left | | border-bottom-start | border-bottom-left | border-bottom-right | | Margin | | | | margin-start | margin-left | margin-right | | margin-end | margin-right | margin-left | | margin: 0 2rem 0 3rem; | margin: 0 2rem 0 3rem; | margin: 0 3rem 0 2rem; | | Padding | | | | padding-start | padding-left | padding-right | | padding-end | padding-right | padding-left | | padding: 0 1rem 0 4rem; | padding: 0 1rem 0 4rem; | padding: 0 4rem 0 1rem; | | Position | | | | start: 1rem; | left: 1rem; | right: 1rem; | | end: 1rem; | right: 1rem; | left: 1rem; |
BONUS: Convert your existing code to this syntax
Don't you feel like find/replace rules in each one of your *.css
files?
No worries, I built a simple tool that does that for you.
You just need to tell where you want to run the converter (folder or file.css). By default it runs in src
folder
Input
.item {
padding-left: 5rem;
margin-right : 1rem;
float:left;
}
Convert from LTR layout
Convert by default runs on src
folder
node node_modules/postcss-start-to-end/convert
Set a specific folder to run:
node node_modules/postcss-start-to-end/convert src/components
Set a specific file to run:
node node_modules/postcss-start-to-end/convert styles/index.css
Output
.item {
padding-start: 5rem;
margin-end : 1rem;
float:start;
}
Convert RTL layout
Convert by default runs on src
folder
node node_modules/postcss-start-to-end/convert --rtl
Set a specific folder to run:
node node_modules/postcss-start-to-end/convert src/components --rtl
Set a specific file to run:
node node_modules/postcss-start-to-end/convert styles/index.css --rtl
Output
.item {
padding-end: 5rem;
margin-start : 1rem;
float:end;
}
F.A.Q.
Why should I use this instead of plugins that convert *-left
to *-right
and vice-versa?
This is not a replacement of those kind of plugins.
This is a plugin to let you write code with a logical thought in mind rather than a physical/direction one.
Then if you need to convert the outputted CSS to the opposite direction you might want to try postcss-rtl.
Is this tested?
- The PostCSS Plugin has 100% coverage test with all possible scenarios that crossed my mind.
- The Converter tests will be added soon!
- Don't fear: Travis-ci is doing it's job!
Motivation | References
There is a CSS Draft Spec about CSS Logical Properties in Level 1. Because this technology's specification has not stabilized, I decided to keep this plugin syntax simple and straight following what is already defined without adding more sugar.
Contribute
Any doubts or suggestions you may have, feel free to create an issue on github repository.