JSFiddle - React, Tailwind, and code Playground

HTML

<section>
    <h1>Non-strict</h1>
    
    <p>Typeof <code>this</code> inside a function when called on a number: <code id="typeof-1"></code></p>

    <p>Typeof <code>this</code> inside an <code>Object.prototype</code> getter when used on a number: <code id="typeof-2"></code></p>
</section>

<section>
    <h1>Strict</h1>
    
    <p>Typeof <code>this</code> inside a function when called on a number: <code id="typeof-strict-1"></code></p>

    <p>Typeof <code>this</code> inside an <code>Object.prototype</code> getter when used on a number: <code id="typeof-strict-2"></code></p>
</section>

CSS

section {
    margin: 30px 10px;
}

h1 {
    font-weight: bold;
    line-height: 1.5;
}

JavaScript

function callMe() {
    document.getElementById("typeof-1").textContent = typeof this;
}

Object.defineProperty(Object.prototype, "getMe", {
    get: function() {
        document.getElementById("typeof-2").textContent = typeof this;
    }
});

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

///////////////

function callMeStrict() {
    "use strict";
    document.getElementById("typeof-strict-1").textContent = typeof this;
}

Object.defineProperty(Object.prototype, "getMeStrict", {
    get: function() {
        "use strict";
        document.getElementById("typeof-strict-2").textContent = typeof this;
    }
});

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