Using Esprima with Rhino or Nashorn

With Rhino or Nashorn, Esprima must be loaded from its source using the load function, such as:

load('/path/to/esprima.js');

The module esprima will be available as part of the global object.

The following session with Nashorn shell, jrunscript, demonstrates the usage:

$ jrunscript
nashorn> load('esprima.js')
nashorn> ast = esprima.parseScript('const answer = 42')
[object Object]
nashorn> print(JSON.stringify(ast, null, 2))
{
  "type": "Program",
  "body": [
    {
      "type": "VariableDeclaration",
      "declarations": [
        {
          "type": "VariableDeclarator",
          "id": {
            "type": "Identifier",
            "name": "answer"
          },
          "init": {
            "type": "Literal",
            "value": 42,
            "raw": "42"
          }
        }
      ],
      "kind": "const"
    }
  ],
  "sourceType": "script"
}