Question

In: Computer Science

3. Every HTML element has innerHTML and outerHTML properties. What is the difference between the two?...

3. Every HTML element has innerHTML and outerHTML properties. What is the difference between the two?

4. Suppose a variable x holds “dog”. After the following code gets executed, what does x hold? x += "fish";

5. When the following code executes, what message does the dialog box display? var month = "January"; if (month.toLowerCase() == "january") { alert("It is " + month + "!"); }

6. After the following code executes, what does x hold? var animal = "porcupine"; var x = animal.lastIndexOf("p", 3);

7. What is the purpose of the z-index CSS property?

8. When executed, what does the following code fragment display? var x = 5; var y = x++; alert("x = " + ++x + ", y = " + y);

Solutions

Expert Solution

(3.) Difference between innerHTML & outerHTML:

innerHTML: It is a property of a DOM (DatavObject Model) element that represents the HTML data inside the element in between opening and closing tags.

outerHTML: It is a property of a DOM (DatavObject Model) element that represents the HTML data inside the element in between opening and closing tags as well as HTML data of the selected element.

Example:

<tr id="table_row">
    <td>FIRST</td>
    <td>SECOND</td>
</tr>

In this above example, innerHTML returns only <td> element, whereas outerHTML returns <tr> with <td> elements.

(4.)

var x = "dog";
x += "fish";
document.write(x);

Output:

(5.)

var month = "January";

if (month.toLowerCase() == "january"){
        alert("It is " + month + "!");
}

Output:

(6.)

var animal = "porcupine";
var x = animal.lastIndexOf("p", 3);
document.write(x)

Output:

(7.)

The main purpose of the z-index CSS property to sets the stacking level of an element. There are two types by which we can use z-index property: (1.) auto (2.) integer

Example:

<!DOCTYPE html>
<html>
   <head>
   </head>
   
   <body>
      <div style = "background-color:blue;
         width:200px;
         height:200px;
         position:relative;
         top:10px;
         left:80px;
         z-index:2">
      </div>
      
      <div style = "background-color:green;
         width:200px;
         height:200px;
         position:relative;
         top:-80px;
         left:35px;
         z-index:1;">
      </div>
   </body>
</html>

Output 1:

<!DOCTYPE html>
<html>
   <head>
   </head>
   
   <body>
      <div style = "background-color:blue;
         width:200px;
         height:200px;
         position:relative;
         top:10px;
         left:80px;
         z-index:0">
      </div>
      
      <div style = "background-color:green;
         width:200px;
         height:200px;
         position:relative;
         top:-80px;
         left:35px;
         z-index:1;">
      </div>
   </body>
</html>

Output 2:

(8.)

var x = 5;
var y = x++;
alert("x = " + ++x + ", y = " + y);

Output:

Thumbs Up Please !!!

venereology answered 1 year ago
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