WCAG 2.1 Quick Reference
All success criteria at a glance with descriptions
Level:
Category:
3.1.1
Level A
Understandable
Language of Page
The default human language of each web page can be programmatically determined.
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3.2.1
Level A
Understandable
On Focus
When any component receives focus, it does not initiate a change of context.
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3.2.2
Level A
Understandable
On Input
Changing the setting of any user interface component does not automatically cause a change of context unless the user has been advised.
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3.3.1
Level A
Understandable
Error Identification
If an input error is automatically detected, the item in error is identified and the error is described to the user in text.
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3.3.2
Level A
Understandable
Labels or Instructions
Labels or instructions are provided when content requires user input.
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