Web Accessibility Checker : Check Details

Element

script

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

script should not cause screen flicker.

Error

script may cause screen flicker.

Short Description

This error will be generated for all script elements.

How To Determine

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

Steps To Check

Procedure

1. View the operation of each script in the document.

Expected Result

1. The script should not cause the screen to flicker.

Failed Result

1. Remove the script or modify it so the screen does not flicker.

Examples

Pass Examples

Does not contain a script element.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en">
<head>
<title>OAC Testfile - Check #87 - Negative</title>
</head>
<body>
</body>
</html>

Fail Examples

Contains a script element.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en">
<head>
<title>OAC Testfile - Check #87 - Positive</title>
</head>
<body>
<script/>
<noscript>Alternate content for script</noscript>
</body>
</html>