Web Accessibility Checker : Check Details

Element

applet

Error Type

Potential

Guidelines

BITV 1.0 (Level 2)
Level 1
7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
Section 508
J - avoid flicker
Stanca Act
Requirement 5: Flicker
WCAG 1.0 (Level A)
Priority 1
7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
WCAG 1.0 (Level AA)
Priority 1
7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
WCAG 1.0 (Level AAA)
Priority 1
7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
WCAG 2.0 (Level A)
2.3 Seizures: Do not design content in a way that is known to cause seizures.
Success Criteria 2.3.1 Three Flashes or Below Threshold (A)
WCAG 2.0 (Level AA)
2.3 Seizures: Do not design content in a way that is known to cause seizures.
Success Criteria 2.3.1 Three Flashes or Below Threshold (A)
WCAG 2.0 (Level AAA)
2.3 Seizures: Do not design content in a way that is known to cause seizures.
Success Criteria 2.3.1 Three Flashes or Below Threshold (A)

Requirement

applets cause screen flicker.

Error

applet may flicker.

Short Description

This error is generated for all applet elements.

How To Determine

Question	Does this `applet` cause screen flicker?
PASS	`applet` does not cause screen flicker.
FAIL	`applet` causes screen flicker.

Steps To Check

Procedure

1. View the operation of each applet in the document.
2. Determine if the applet flickers according to the general flash threshold and red flash threshold.

Expected Result

1. All applets do not flicker.

Failed Result

1. Modify the applet so it does not flicker.

Examples

Pass Examples

applet does not flicker.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=UTF-8" />
<title>ATRC Testfile - Check #22.2 - Negative</title>
</head>
<body>
<p>There is not a realy applet here yet. I'm looking for one that does not flicker.</p>
<applet code="bubbles2.class"/>
</body>
</html>

Fail Examples

applet flickers.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=UTF-8" />
<title>ATRC Testfile - Check #22.1 - Positive</title>
</head>
<body>
<p>There is not a realy applet here yet. I'm looking for one that flickers.</p>
<applet code="bubbles.class"/>
</body>
</html>