Web-Development-Applications Exam Dumps : WGU Web Development Applications (KVO1)

To ensure that a message appears if the user’s browser does not support the audio files on a web page, the developer should use the

Correct Usage:

Fallback Content: Place the message as fallback content inside the

Example:

No mpeg support.

Explanation of Options:

Option A: Incorrect. The alt attribute is not valid for the element.

Option B: Incorrect. The alt attribute is not valid for the

Option C: Incorrect. The alt attribute is used incorrectly in the

Option D: Correct. The message "No mpeg support." is placed correctly as fallback content inside the

References:

W3C HTML5 Specification - The audio element

MDN Web Docs -

Using the fallback content inside the

The prompt method in JavaScript displays a dialog box that prompts the user for input, allowing the end user to enter text as an answer to a question when the page loads.

prompt Method: The prompt method displays a dialog box with an optional message prompting the user to input some text. It returns the text entered by the user or null if the user cancels the dialog.

Usage Example:

let userInput = prompt("Please enter your name:", "Harry Potter");

console.log(userInput);

In this example, a prompt dialog asks the user to enter their name, and the entered text is logged to the console.

References:

MDN Web Docs on prompt

W3C HTML Specification on Dialogs

The watchPosition method in the Geolocation API is used to get periodic updates about the geographic location of a user.

watchPosition Method: This method calls the provided callback function with the user's current position as the device's location changes.

Usage Example:

navigator.geolocation.watchPosition(function(position) {

console.log("Latitude: " + position.coords.latitude + ", Longitude: " + position.coords.longitude);

});

In this example, the watchPosition method continuously logs the user's latitude and longitude to the console as the position changes.

References:

MDN Web Docs on watchPosition

W3C Geolocation API Specification