letvarconst

gistfile1.txt

let a = b;
==========

{
    "type": "Script",
    "directives": [],
    "items": [
        {
            "type": "LexicalDeclaration",
            "kind": "let",
            "declarators": [
                {
                    "type": "LexicalBinding",
                    "binding": {
                        "type": "BindingIdentifier",
                        "name": "a"
                    },
                    "initializer": {
                        "type": "IdentifierReference",
                        "name": "b"
                    }
                }
            ]
        }
    ]
}

var  a = b;
=========

{
    "type": "Script",
    "directives": [],
    "items": [
        {
            "type": "VariableStatement",
            "declarators": [
                {
                    "type": "VariableDeclaration",
                    "binding": {
                        "type": "BindingIdentifier",
                        "name": "a"
                    },
                    "initializer": {
                        "type": "IdentifierReference",
                        "name": "b"
                    }
                }
            ]
        }
    ]
}

const [] = {};
==============

{
    "type": "Script",
    "directives": [],
    "items": [
        {
            "type": "LexicalDeclaration",
            "kind": "const",
            "declarators": [
                {
                    "type": "LexicalBinding",
                    "binding": {
                        "type": "ArrayBindingPattern",
                        "elements": []
                    },
                    "initializer": {
                        "type": "ObjectLiteral",
                        "properties": []
                    }
                }
            ]
        }
    ]
}