<script>
        var _value = "test value";
        Object.defineProperty(window, "testName", {
            get: () => _value,
            set: (value) => { _value = String(value) },
        });
    </script>
    <script>
        var testName = {};
        // prints [object Object] string
        console.log(testName, typeof testName);
        var name = {};
        // prints [object Object] string
        console.log(name, typeof name);
    </script>

Other properties have the same behavior, for example `status`.

Note: there's also LegacyUnforgeable which has similar behavior: https://webidl.spec.whatwg.org/#LegacyUnforgeable

Even if you're not using modules, using an IIFE avoids all this by making your variables local instead of having them define/update properties on the global.

  name = {first: "Jane", last: "Doe"}

I must have never used "name" as a name for a global variable or just for ones that were strings.