ocss-parser

This is the repository for the syntax parser and stringifier of the OCSS preprocessor. You can try it out in the live editor.

Input

display: block
color: red

child // comment
  color: blue
  background: transparent

  :hover
    color: red

  subchild
    font-size: 12px
// another comment
=big
  font-size: 200%

  child
    color: red

AST Output

{
  "type": "object",
  "name": "test",
  "declarations": [
    {
      "position": {
        "line": 1
      },
      "type": "declaration",
      "property": "display",
      "value": "block"
    },
    {
      "position": {
        "line": 2
      },
      "type": "declaration",
      "property": "color",
      "value": "red"
    }
  ],
  "elements": [
    {
      "position": {
        "line": 4
      },
      "type": "element",
      "name": "child",
      "declarations": [
        {
          "position": {
            "line": 5
          },
          "type": "declaration",
          "property": "color",
          "value": "blue"
        },
        {
          "position": {
            "line": 6
          },
          "type": "declaration",
          "property": "background",
          "value": "transparent"
        }
      ],
      "pseudoelements": [
        {
          "position": {
            "line": 8
          },
          "type": "pseudoelement",
          "name": "hover",
          "declarations": [
            {
              "position": {
                "line": 9
              },
              "type": "declaration",
              "property": "color",
              "value": "red"
            }
          ]
        }
      ],
      "elements": [
        {
          "position": {
            "line": 11
          },
          "type": "element",
          "name": "subchild",
          "declarations": [
            {
              "position": {
                "line": 12
              },
              "type": "declaration",
              "property": "font-size",
              "value": "12px"
            }
          ]
        }
      ]
    }
  ],
  "modifiers": [
    {
      "position": {
        "line": 14
      },
      "type": "modifier",
      "name": "big",
      "declarations": [
        {
          "position": {
            "line": 15
          },
          "type": "declaration",
          "property": "font-size",
          "value": "200%"
        }
      ],
      "elements": [
        {
          "position": {
            "line": 17
          },
          "type": "element",
          "name": "child",
          "declarations": [
            {
              "position": {
                "line": 18
              },
              "type": "declaration",
              "property": "color",
              "value": "red"
            }
          ]
        }
      ]
    }
  ]
}

CSS Output

.test {
  display: block;
  color: red;
}
.test-child {
  color: blue;
  background: transparent;
}
.test-child-subchild {
  font-size: 12px;
}
.test-child:hover {
  color: red;
}
.test--big {
  font-size: 200%;
}
.test--big .test-child {
  color: red;
}

Tests

Install dependencies with npm install once. Afterwards run npm test every time you want to start the tests.