HTML and CSS Reference
In-Depth Information
Navigator
Screen
Window
For example, in the “Types of data” section earlier in this chapter, you saw how the
naviga-
tor.platform
property was used to i nd the type of computer in use.
h e HTML5 DOM itself has far more objects, and the most used is the
Document
property.
h e list of objects is the same as the list of elements. So, a list of all the DOM objects is a list of
all elements, plus some others that are used in conjunction with the DOM. For example, the
following are included in the HTML5 DOM but aren't exactly elements:
Document
Event
Image
Link
Meta
Some of these objects we see in tags. For example, the image object is seen in the
<img>
tags.
Its properties are similar to the
img
element's attributes. Others, like document are implied
in that a Web page is the document. h e
event
object is employed in event handling with
methods such as
onClick
. h e rest are elements, so they should be familiar. But instead
of attributes in a tag, expect to i nd properties with the same names and functions as equiva-
lent attributes.
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TAKE THE WHEEL
Data sources are important to understand, and one way to understand them is to practice
using dif erent types. h e challenge is to do the following:
1.
Select a string — one of your favorite sayings or pieces of information. For example,
“All objects are made up of properties and methods.”
2.
Assign the string to a variable and use
document.write()
to send it to the screen.
3.
Break down the string into several separate words and place each word into a
dif erent array element and then using the
array.pop()
method and
document.
write()
to display them on the screen in a single message.
4.
Finally, create an object with a property that is assigned the string that you've
selected. Create a method for the property that displays the string to the screen.
