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<html><body><h1>Regular Function</h1><p>The <strong>this</strong> keyword represents different objects depending on how the function was called.</p><button id="btn">Click Me!</button><p><strong>this</strong> represents:</p><p id="demo"></p><p>See the difference before and after the button is clicked.</p> <script>class Header { constructor() { this.color = "Red"; } changeColor = function() { document.getElementById("demo").innerHTML += this; }}const myheader = new Header();//The window object calls the function:window.addEventListener("load", myheader.changeColor);//A button object calls the function:document.getElementById("btn").addEventListener("click", myheader.changeColor);</script></body></html>