JSFiddle - React, Tailwind, and code Playground

HTML

<h1>Value of <code>typeof this</code> inside each context and environment applied to a number</h1>

<table>
    <thead>
        <tr>
            <td></td>
            <th>Function</th>
            <th>Getter</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <th>Strict</th>
            <td id="strict-function"></td>
            <td id="strict-getter"></td>
        </tr>
        <tr>
            <th>Non-strict</th>
            <td id="non-strict-function"></td>
            <td id="non-strict-getter"></td>
        </tr>
    </tbody>
</table>

CSS

h1 {
    font-weight: bold;
    margin-bottom: 20px;
}

th {
    font-weight: bold;
}

th, td {
    padding: 5px;
}

JavaScript

function callMe() {
    document.getElementById("non-strict-function").textContent = typeof this;
}

function callMeStrict() {
    "use strict";
    document.getElementById("strict-function").textContent = typeof this;
}

Object.defineProperty(Object.prototype, "getMe", {
    get: function() {
        document.getElementById("non-strict-getter").textContent = typeof this;
    }
});

Object.defineProperty(Object.prototype, "getMeStrict", {
    get: function() {
        "use strict";
        document.getElementById("strict-getter").textContent = typeof this;
    }
});

callMe.call(0);
callMeStrict.call(0);
(0).getMe;
(0).getMeStrict;