Web Accessibility Checker : Check Details

Element

object

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

All objects do not flicker.

Error

object may flicker.

Short Description

This error is generated for all object elements.

How To Determine

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

Steps To Check

Procedure

1. View the operation of each object element in your document.
2. Determine if the object flickers using the general flash threshold and red flash threshold.

Expected Result

1. All objects do not flicker.

Failed Result

1. Remove the object or modify the object so it does not flicker.

Examples

Pass Examples

object 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 #30.2 - Negative</title>
</head>
<body>
<p>There is not a real object here. I need an object that does not flicker.</p>
<object/>
</body>
</html>

Fail Examples

object 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 #30.1 - Positive</title>
</head>
<body>
<p>There is not a real object here. I need an object that flickers.</p>
<object/>
</body>
</html>