Element

applet

Error Type

Potential

Guidelines

  • BITV 1.0 (Level 2)
    Guideline GroupLevel 1
    Guideline Subgroup7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
  • Section 508
    Guideline GroupJ - avoid flicker
  • Stanca Act
    Guideline GroupRequirement 5: Flicker
  • WCAG 1.0 (Level A)
    Guideline GroupPriority 1
    Guideline Subgroup7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
  • WCAG 1.0 (Level AA)
    Guideline GroupPriority 1
    Guideline Subgroup7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
  • WCAG 1.0 (Level AAA)
    Guideline GroupPriority 1
    Guideline Subgroup7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker.
  • WCAG 2.0 (Level A)
    Guideline Group2.3 Seizures: Do not design content in a way that is known to cause seizures.
    Guideline SubgroupSuccess Criteria 2.3.1 Three Flashes or Below Threshold (A)
  • WCAG 2.0 (Level AA)
    Guideline Group2.3 Seizures: Do not design content in a way that is known to cause seizures.
    Guideline SubgroupSuccess Criteria 2.3.1 Three Flashes or Below Threshold (A)
  • WCAG 2.0 (Level AAA)
    Guideline Group2.3 Seizures: Do not design content in a way that is known to cause seizures.
    Guideline SubgroupSuccess 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>

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