• JavaScript is sometimes shortened to 'JS'.
• JS elements are represented as 'statements'.
• JS statements are separated with semicolons.

• JavaScript Comments:
• Comments are used to explain code, and may be used for when you need to change something at a later time.
• They are ignored by browsers.
• Comment syntax: // Comment here

• How to include JavaScript in HTML?
• Choose one of the two options below to insert JS code in an HTML document.
• 1. Insert it into your document between script tags (<script> and </script>).
• 2. Include the following code anywhere in your HTML document, but replace "myscript.js" with the location of your script: <script src="myscript.js"></script>

Meaning and Usage

• <script> and </script> contains the JavaScript.
• 'function dostuff()' defines a function, named 'dostuff'.
• When the button is clicked, it will run that function.
• 'document.getElementById("boop")' returns the HTML element with the ID of 'boop'. In this case, it's the p tag.
• Then, it follows that by '.innerText="!dlrow olleH"', which sets the text of the p to '!dlrow olleH' (which is the reverse of 'Hello world!').
• Lastly, 'alert("Text reversed!")' notifies the user that the text has been reversed with a simple alert dialog.