JavaScript Identifiers

Which one of the following variable identifiers is best-practice?

• var my_video;
• var myVid;
• var v;
• var myVideo;

What is the HTML5 element that allows us to script drawings directly onto our web pages?

• <video>
• <drawing>
• <canvas>
• <section>

You need to create a variable that will store the id number of a user. Which one of the following would be the best identifier?

• userId
• user_id
• IdOfUser
• userid