Level AOperableTested by A11yied
WCAG 2.3.1: Three Flashes or Below Threshold
2.3 Seizures and Physical Reactions
What Does This Criterion Require?
Content does not contain anything that flashes more than three times per second.
Technical Details
| WCAG Level | A |
|---|---|
| WCAG Version | 2.1, 2.2 |
| POUR Principle | Operable |
| Guideline | 2.3 Seizures and Physical Reactions |
| A11yied Testing | Fully Automated |
How A11yied Tests This Criterion
A11yied automatically validates WCAG 2.3.1 using browser-based testing that analyzes your page in real-time.
Implementation: seizure-prevention.ts
Test This Criterion on Your Site
Use A11yied to scan your website and identify WCAG 2.3.1 violations automatically. Get detailed reports with code examples and fix recommendations.
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Official WCAG Reference
View the official WCAG specification for 2.3.1 Three Flashes or Below Threshold on the W3C website for complete technical details and implementation guidance.
Read W3C Understanding 2.3.1→