Use http://esprima.org/demo/parse.html

syntax.json

{
    "type": "Program",
    "body": [
        {
            "type": "BlockStatement",
            "body": [
                {
                    "type": "ExpressionStatement",
                    "expression": {
                        "type": "BinaryExpression",
                        "operator": "+",
                        "left": {
                            "type": "Literal",
                            "value": 1
                        },
                        "right": {
                            "type": "Literal",
                            "value": ""
                        }
                    }
                }
            ]
        },
        {
            "type": "ExpressionStatement",
            "expression": {
                "type": "UnaryExpression",
                "operator": "+",
                "argument": {
                    "type": "Literal",
                    "value": 10
                }
            }
        }
    ]
}