css-flip

css-flip

A CSS BiDi flipper. Generate left-to-right (LTR) or right-to-left (RTL) CSS from your source.

Installation

npm install css-flip

Example use

var flip = require('css-flip');
var css = 'div { float: left; }';

flip(css);
// => 'div { float: right; }'

As a Rework plugin:

var flip = require('css-flip');
var rework = require('rework');
var css = 'div { float: left; }';

rework(css).use(flip.rework()).toString();
// => 'div { float: right; }'

Supported CSS Properties (a-z)

background-position, background-position-x, border-bottom-left-radius, border-bottom-right-radius, border-color, border-left, border-left-color, border-left-style, border-left-width, border-radius, border-right, border-right-color, border-right-style, border-right-width, border-style, border-top-left-radius, border-top-right-radius, border-width, box-shadow, clear, direction, float, left, margin, margin-left, margin-right, padding, padding-left, padding-right, right, text-align transition transition-property

Processing directives

css-flip provides a way to ignore declarations or rules that should not be flipped, and precisely replace property values.

@noflip

Prevent a single declaration from being flipped.

Source:

p {
  /*@noflip*/ float: left;
  clear: left;
}

Yields:

p {
  float: left;
  clear: right;
}

Prevent all declarations in a rule from being flipped.

Source:

/*@noflip*/
p {
  float: left;
  clear: left;
}

Yields:

p {
  float: left;
  clear: left;
}

@replace

Replace the value of a single declaration. Useful for custom LTR/RTL adjustments, e.g., changing background sprite positions or using a different glyph in an icon font.

Source:

p {
  /*@replace: -32px -32px*/ background-position: -32px 0;
  /*@replace: ">"*/ content: "<";
}

Yields:

p {
  background-position: -32px -32px;
  content: ">";
}

CLI

The CLI can be used globally or locally in a package.

View available options:

css-flip --help

Example use:

css-flip path/to/file.css > path/to/file.rtl.css

Development

Run the lint and unit tests:

npm test

Just the JSHint tests:

npm run lint

Just the Mocha unit tests:

npm run unit

Run Mocha unit tests in "watch" mode:

npm run watch

License and Acknowledgements

Copyright 2014 Twitter, Inc. and other contributors.

Licensed under the MIT License

css-flip was inspired by ded/R2 and Closure Stylesheets.

Changelog

0.5.0 - 23 June 2014

• Support all valid CSS numbers for background-position.
• Only flip background-position single value if it's a percentage.
• Only flip background-position X value of 0% to 100%.
• Update to 'css' 2.0.0.
• Add support for transition and transition-property.
• Drop support for non-standard border-radius.
• Fix CLI.