IFRAME

Question 1

IFRAME

Answer 1

represents a nested browsing context*

Question 2

*browsing context,

Answer 2

the environment in which a browser displays a Document

Question 3

iframe main features

Answer 3

own session history* + own document*

Question 4

*session history

Answer 4

visited pages; history

Question 5

*document

Answer 5

The Document interface represents any web page loaded by the browser & is the entry point into the web page’s content (DOM Tree)

Question 6

*DOM Tree

Answer 6

a kind of tree whose nodes represent a HTML or XML document’s structure

Question 7

parent browsing context

Answer 7

the context that embeds another bowser context

Question 8

child browsing context

Answer 8

the context that is embedded by another browser context

Question 9

topmost browsing context

Answer 9

browser context with no parent

Question 10

iframe DOM element

Answer 10

HTMLIFrameElement

Question 11

iframe restrictions (JS + CSS)

Answer 11

same-origin* policy:

cannot access parent / child context if not same-origin*

Question 12

*origin

Answer 12

scheme (protocol) + hostname (domain) + port

Question 13

.postMessage

Answer 13

a method of communication btw. cross-origin browsing contexts

Question 14

cross-origin access

Answer 14

no access, except to each other’s window object

Question 15

top level window

Answer 15

window.top

Question 16

parent window

Answer 16

window.parent - returns self if no parent

Question 17

css inheritance

Answer 17

no inheritance

Question 18

list all child contexts

Answer 18

window.frames