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liferay-css-parse

Liferay fork of CSS parser

1.7.1
latest
Source
npm
Version published
Weekly downloads
414
-7.8%
Maintainers
1
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css-parse Build Status

JavaScript CSS parser for nodejs and the browser.

Installation

$ npm install css-parse

Usage

var parse = require('css-parse');

// CSS input string
var css = "body { \n background-color: #fff;\n }";

var output_obj = parse(css);

// Position and Filename parameters
var output_obj_pos = parse(css, { position: true, filename: 'file.css' });

// Print parsed object as CSS string
console.log(JSON.stringify(output_obj, null, 2));

API

var ast = parse(css, [options])

options:

  • filename - recommended for debugging
  • position - true by default.

Errors

Errors will have err.position where position is:

  • start - start line and column numbers
  • end - end line and column numbers
  • filename - filename if passed to options
  • source - source CSS string

If you create any errors in plugins such as in rework, you must set the position as well for consistency.

Example

css:

body {
  background: #eee;
  color: #888;
}

parse tree:

{
  "type": "stylesheet",
  "stylesheet": {
    "rules": [
      {
        "type": "rule",
        "selectors": [
          "body"
        ],
        "declarations": [
          {
            "type": "declaration",
            "property": "background",
            "value": "#eee"
          },
          {
            "type": "declaration",
            "property": "color",
            "value": "#888"
          }
        ]
      }
    ]
  }
}

parse tree with .position enabled:

{
  "type": "stylesheet",
  "stylesheet": {
    "rules": [
      {
        "type": "rule",
        "selectors": [
          "body"
        ],
        "declarations": [
          {
            "type": "declaration",
            "property": "background",
            "value": "#eee",
            "position": {
              "start": {
                "line": 3,
                "column": 3
              },
              "end": {
                "line": 3,
                "column": 19
              }
            }
          },
          {
            "type": "declaration",
            "property": "color",
            "value": "#888",
            "position": {
              "start": {
                "line": 4,
                "column": 3
              },
              "end": {
                "line": 4,
                "column": 14
              }
            }
          }
        ],
        "position": {
          "start": {
            "line": 2,
            "column": 1
          },
          "end": {
            "line": 5,
            "column": 2
          }
        }
      }
    ]
  }
}

If you also pass in filename: 'path/to/original.css', that will be set on node.position.filename.

Performance

Parsed 15,000 lines of CSS (2mb) in 40ms on my macbook air.

css-stringify css-value

License

MIT

Keywords

css

FAQs

Package last updated on 18 Nov 2015

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