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<!DOCTYPE html>
<html>
<body>
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<h2>The JavaScript <i>this</i> Keyword</h2>
<p>In this example <strong>this</strong> refers to person2, even if it is a method of person1:</p>
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<p id="demo"></p>
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<script>
const person1 = {
  fullName: function() {
    return this.firstName + " " + this.lastName;
  }
}
const person2 = {
  firstName:"John",
  lastName: "Doe",
}
let x = person1.fullName.call(person2); 
document.getElementById("demo").innerHTML = x; 
</script>
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</body>
</html>
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