Window Object

What is it?

• Everything outside of the document, including:
• open, opener
• close
• scroll
• status
• focus/blur
• location (very cool code to get URL encoded data in book!)
• navigator
• appCodeName
• appName
• appVersion
• history
• forward()
• back()
• go()
• window.history.go(-1) is the same as window.history.back()


• Interacting between windows (or frames!)

Image from: JavaScript The Definitive Guide, 4th ed.
• Global Object
• -The window object serves as the global object and global execution context for client-side JS
• Following are essentially the same thing!
• var varName= "something"; - Instantiating a variable
• window.varName= "something"; - property of the window object

Build Window/Frame thingie...

Cookies

• What they are:
• Cookies are a small amount of named data
• stored by the web browser (client side)
• associated with a particular page (or server)
• accessed with the cookie property of the Document object
• What they aren't:
• Cookies in JS do not use any kind of cryptography and are totally insecure!
• A place to store indispensable data (limited space on client, limited life span)
• The 4 parts to a cookie (5 if you are picky...)
• name=value
• document.cookie="danCookie="+escape('hello world!')
• lifetime
• how long the cookie will persist
• with no expiration, cookie is deleted at end of session
• expires=date
• visibility
• Who can use the cookie
• path - can change what directories can use the cookie
• path='../'
• domain - can change the subdomain that can use the cookie
• domain='.rit.edu'
• security
• determines if http is fine - or if needs https
• (default is insecure)
• secure

Ex: Setting a Cookie...

• var nextyear=new Date();
  nextyear.setFullYear(nextyear.getFullYear()+1);
  document.cookie="danCookie="+escape('hello world!') +
  "; expires=" + nextyear.toGMTString() +
  "; path='/';
  domain='polaris.it.rit.edu';
  secure";

Build Cookie thingie...