Web Development
Web Developer Guidelines
Visual Design Recommendations

Checkpoint 1.19 - JavaScript

Event handlers do not rely on the user's mouse coordinates

WCAG 1.0 Priority 2

WCAG Guideline 6. Ensure that pages featuring new technologies transform gracefully.

Some event handlers are able to capture and process the screen coordinates of the mouse and thus enable the user to interact with components that are visually displayed on the screen, such as image maps.

Users who are unable to use a mouse as an input device are unable to access this functionality.

Requirement

Event handlers do not rely on the user's mouse coordinates

Checking Tool

View the source page of the web page in a text editor and search for instances of onmousedown, onmouseup, and onclick.

Information Source

The original source of this information is located on the W3C web site  (www.w3.org/TR/WCAG10-TECHS/#tech-keyboard-operable-scripts)

 

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