02. The Window Object
The window object represents the current open window on a browser.
Properties
The window object has a slew of properties that can tell you (the programmer) about its properties. Skim through these properties and try clicking on their names to see output in the JavaScript console.
closed- Returns True if window is closed.
defaultStatus- Set the text on the status bar.
innerHeight- The inner height of the page (not including toolbar, other tabs, etc).
innerWidth- The inner width (excludes toolbar, other tabs, etc.).
outerHeight- The outer height of a window (including toolbar, other tabs, etc).
outerWidth- The outer width of a window.
location- Window's current URL.
name- Name of the window.
parent- Used with frames to refer to the window that created a particular window or is one level up from the frame.
parent- Reference to the window that the current window came from.
pageXOffset- The number of pixels user has scrolled horizontally from the upper-left corner of document.
pageYOffset- The number of pixels the user has been scrolled vertically.
screenX- Horizontal coordinate of the window relative to the screen.
screenY- Vertical coordinate of the window relative to the screen.
top- The top-most parent window.
Some properties such as top and parent return a reference to another window object.
Additionally, you can access its child elements - document document, frames, history, andnavigator. We'll cover this in the next lesson.
Methods
window contains a good number of methods. In fact, we have already looked at one of them - alert(), which outputs an popup dialog message to the user.
Some of these methods require a parameters, so Google the methods if you want to see exactly how a method works.
alert()- Opens a popup window. User must click OK to close.
prompt()- Prompts user for an input
open()- Opens new browser window with specified URL.
close()- Closes window.
print()- Opens print dialog.
Moving a window object
There are also functions you can use to move the window object.
moveBy()- Move the window relative.
moveTo()- Moves the window to a specific location.
resizeBy()- Change size of window relative to current size.
resizeTo()- Change size of window to specified size.
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