tern-def-origin

A tern plugin for determining the definition AST node and origin for JavaScript types.

Documentation on Sourcegraph

Usage

To install dependencies, run npm install.

This plugin requires tern 0.5.1 (which sets the sourceFile property on AST nodes).

With the tern server

Add this plugin to your .tern-project file:

{
  "plugins": {"/path/to/def-origin.js": {}}
}

With the tern condenser

Load the plugin:

$ node_modules/tern/bin/condense --plugin def-origin testdata/simple.js

You'll see the new !data.aval and !data.type` key paths on types in the condensed output:

{
  "!name": "testdata/simple.js",
  "a": {
    "!type": "fn()",
    "!span": "4[0:4]-5[0:5]",
    "!data": {
      "aval": {
        "originFile": "testdata/simple.js",
        "identSpan": "4-5",
        "defSpan": "8-21"
      },
      "type": {
        "origin": "testdata/simple.js",
        "name": "a"
      }
    }
  },
  "b": {
    "!type": "number",
    "!span": "27[1:4]-28[1:5]",
    "!data": {
      "aval": {
        "originFile": "testdata/simple.js",
        "identSpan": "46-47",
        "defSpan": "49-50"
      },
      "type": {
        "name": "number"
      }
    }
  },
  "c": {
    "d": {
      "!type": "number",
      "!span": "46[3:2]-47[3:3]",
      "!data": {
        "aval": {
          "originFile": "testdata/simple.js",
          "identSpan": "46-47",
          "defSpan": "49-50"
        },
        "type": {
          "name": "number"
        }
      }
    },
    "f": {
      "!type": "fn()",
      "!span": "54[4:2]-55[4:3]",
      "!data": {
        "aval": {
          "originFile": "testdata/simple.js",
          "identSpan": "54-55",
          "defSpan": "57-70"
        },
        "type": {
          "origin": "testdata/simple.js",
          "name": "f"
        }
      }
    },
    "!span": "38[2:4]-39[2:5]",
    "!data": {
      "aval": {
        "originFile": "testdata/simple.js",
        "identSpan": "38-39",
        "defSpan": "42-73"
      },
      "type": {
        "origin": "testdata/simple.js",
        "name": "c"
      }
    }
  },
  "g": {
    "!type": "fn()",
    "!span": "85[7:9]-86[7:10]",
    "!data": {
      "aval": {
        "originFile": "testdata/simple.js",
        "identSpan": "85-86",
        "defSpan": "76-91"
      },
      "type": {
        "origin": "testdata/simple.js",
        "name": "g"
      }
    }
  },
  "e": "Array"
}

Running tests

Run npm test.

Authors

Contributions are welcome! Submit a GitHub issue or pull request.

• Quinn Slack (sqs)