JSFiddle - React, Tailwind, and code Playground

JavaScript

var a = {
    "b": {
        "c": 1
    }
}

var n = "d.c".split(".");
var x = a;
for (var i = 0; i < n.length; i++) {
    x = x[n[i]];
    if (typeof(x) == "undefined") {
        break;
    }
}

alert(x);