Meaning of this: functions in the global scope

for CSCI E3, Harvard University author(s): Larry Bouthillier

by DustyWhite

HTML

<h3>Open your console to see the output</h3>
<p>You can see here that <i>this</i> gets the value of the context from which the function was called.  Remember that variables declared in the global context are actually properties of the Window object.</p>
<p> So <code>sayIt()</code> is actually <code>window.sayIt()</code>  </p>
<p> and so, inside sayIt(), the value of <i>this</i> is the window object. </p>

JavaScript

function sayIt(){
    console.log("this is :" + this);   
    console.log(this);   
}
sayIt();