Guideline 7

1
Guideline 7

• Ensure user control of time-sensitive content
  changes.

2
Control what?

• Time-sensitive content is any moving, blinking,
  scrolling or auto-updating objects or pages.

A developers responsibility is to ensure that
such content can be either paused or stopped
until user agents provide control mechanisms.
3
Checkpoint 1

• Until user agents allow users to control
  flickering, avoid causing the screen to flicker.

Your website is not Club Strata
4
Checkpoint 2

• Until user agents allow users to control
  blinking, avoid causing content to blink.

The BLINK element is not defined in any W3C
HTML specification.
5
Checkpoint 3

• Until user agents allow users to freeze moving
  content, avoid movement in pages.

The MARQUEE element is not defined in any W3C
HTML specification.
6
Checkpoint 4 - 5

• Until user agents provide the ability to stop the
  refresh, do not create periodically
  auto-refreshing pages.

Until user agents provide the ability to stop
auto-redirect, do not use markup to redirect
pages automatically. Instead, configure the
server to perform redirects.
7
Content developers sometimes create pages that
refresh or change without the user requesting the
refresh. This automatic refresh can be very
disorienting to some users.