# WCAG 2.2 – 3.2.2 On Input

- Level: A
- Principle: 3 Understandable
- Guideline: 3.2 Predictable
- Introduced in: WCAG 2.0

## What the rule requires

Selecting or typing something does not automatically cause anything unexpected – unless people were told beforehand.

## How to get it right

Do not let a select list change the page right away. Put a “Show” button next to it.

## Who benefits

- Blind people
- People with cognitive disabilities

## Sources

- [This rule on wcag.dehl.net](https://wcag.dehl.net/en/wcag/3-2-2/)
- [Official W3C explanation](https://www.w3.org/WAI/WCAG22/Understanding/on-input)
- [Techniques (WCAG Quick Reference)](https://www.w3.org/WAI/WCAG22/quickref/#on-input)

_Plain-language explanation. Only the original W3C text is normative._