JSFiddle - React, Tailwind, and code Playground

JavaScript

var json = {
    "?xml": {
        "@version": "1.0",
        "@encoding": "utf-8"
    },
    "Response": {
        "Users": null,
        "Messages": {
            "Tell": {
                "Notify": {
                    "@From": "abc",
                    "@Message": "hi system, its abc<br/>"
                }
            },
            "Group": null
        },
        "PersistedMessages": {
            "Tell": null,
            "Group": null
        }
    }
}
    alert(json["?xml"]["@version"]);