HTML5 Application Development Fundamentals — Question 17

You work as a senior developer at ABC.com. The ABC.com network consists of a single domain named ABC.com. ABC.com makes use of HTML5 and CSS3 in their development process.
You are running a training exercise for junior developers. You are currently discussing a property of the WebSocket API that returns the type of data received by the onmessage event.
Which of the following is the property being discussed?

Answer options

• A. The extensions property.
• B. The binaryType property.
• C. The readyState property.
• D. The protocol property.

Correct answer: B

Explanation

The correct answer is B, the binaryType property, which specifies the format of the data being transmitted through the WebSocket connection. Options A, C, and D refer to different properties that do not relate to the data type received by the onmessage event, making them incorrect in this context.