| Title | Blinking with CSS to highlight important information |
|---|---|
| Description | A document with "normal" content and a paragraph with blinking content. The blinking effect is created with the CSS rule text-decoration: blink. This property is not supported by all browsers (for example Internet Explorer 6) and cannot be turned off in some other browsers (including Mozilla 1.7.3 and Firefox 1.0). |
| Creator | BenToWeb (Christophe.Strobbe@…) |
| Rights | Copyright BenToWeb 2004-2007 |
| Language | English |
| Date | 2005-09-29 |
| Status | accepted for end user evaluation |
Technologies are markup languages or data formats. If the technology is a markup language, “features” refers to elements and attributes.
XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)
Cascading Style Sheets, level 2
Feature: text-decoration.
Technical specification: text-decoration .
This test case is intended to fail because the blinking does not stop after three seconds and there is no mechanism in the content to turn it off. Only the blinking paragraph is tested here, not the other parts of the page.
End user.
“Rules” refer to success criteria in WCAG 2.0, checkpoints in WCAG 1.0 and similar requirements.
The test case needs review before it can be established if it passes or fails the following success criterion: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#time-limits-blink. The code that causes doubt can be found at line 8, column 29.
The instructions in the last paragraph blink for more than three seconds, unless the user turns off the blinking in their browser.
Conforming user agents are not required to support the value "blink" for the property text-decoration (http://www.w3.org/TR/1998/REC-CSS2-19980512/text.html#propdef-text-decoration).
Internet Explorer does not seem to support the value "blink" for the property text-decoration, because it does not cause any blinking.
In Opera 8.02, the blinking can be turned off by switching to "user mode". In Mozilla 1.7.3 and Firefox 1.0, the "Preferences" or "Options" dialogue does not contain a mechanism to turn off blinking.