A basic AST for a one line ES6 code

Sample AST

{
    "type": "Program",
    "start": 0,
    "end": 23,
    "body": [
        {
            "type": "VariableDeclaration",
            "start": 0,
            "end": 22,
            "declarations": [
                {
                    "type": "VariableDeclarator",
                    "start": 4,
                    "end": 21,
                    "id": {
                        "type": "Identifier",
                        "start": 4,
                        "end": 9,
                        "name": "array"
                    },
                    "init": {
                        "type": "ArrayExpression",
                        "start": 12,
                        "end": 21,
                        "elements": [
                            {
                                "type": "Literal",
                                "start": 13,
                                "end": 14,
                                "value": 1,
                                "raw": "1"
                            },
                            {
                                "type": "Literal",
                                "start": 15,
                                "end": 16,
                                "value": 2,
                                "raw": "2"
                            },
                            {
                                "type": "Literal",
                                "start": 17,
                                "end": 20,
                                "value": "b",
                                "raw": "'b'"
                            }
                        ]
                    }
                }
            ],
            "kind": "let"
        }
    ],
    "sourceType": "script"
}