Free Web-Development-Applications WGU Updates

The onmouseover attribute in HTML and JavaScript is used to execute a script when the mouse pointer is moved over an element.

onmouseover Attribute: This event occurs when the mouse pointer is moved onto an element. It is commonly used to change styles or content of the element when the user interacts with it by hovering.

Usage Example:

Hover over this text to change its color to red.

In this example, the text color changes to red when the mouse pointer is moved over the paragraph.

References:

MDN Web Docs on onmouseover

W3C HTML Specification on Events

The data type of the variable a is determined by the value assigned to it. In JavaScript, if a value is enclosed in double or single quotes, it is treated as a string.

Variable Assignment:

Given the code:

var a = "true";

The value "true" is enclosed in double quotes, making it a string.

Explanation:

Option A: Boolean is incorrect because the value "true" is a string, not a boolean.

Option B: String is correct because the value is enclosed in double quotes.

Option C: Object is incorrect because the value is a primitive string.

Option D: Undefined is incorrect because the variable a is assigned a value.

References:

MDN Web Docs - JavaScript Data Types

W3Schools - JavaScript Data Types

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

Given the code segment:

var a = "8";

var b = "6";

var c = a + b;

console.log(c);

This code concatenates two strings.

Explanation:

var a = "8";: Variable a is assigned the string "8".

var b = "6";: Variable b is assigned the string "6".

var c = a + b;: The + operator concatenates the two strings, resulting in "86".

console.log(c);: Outputs the value of c to the console.

Output:

The console displays "86" because it concatenates the two string values.

References:

MDN Web Docs - String

W3Schools - JavaScript String