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Checks that active, focusable elements have unique IDs
Rule IDa11y/duplicate-id-active
CategoryAccessibility
ScopePer-page
Severityerror
Weight7/10

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Solution

Duplicate IDs on focusable elements (links, buttons, inputs) break keyboard navigation and label associations. Browsers only recognize the first element with a given ID, so labels, focus management, and ARIA references will target the wrong element. Ensure every focusable element with an id attribute has a unique value.

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Enable / Disable

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Disable this rule

squirrel.toml
[rules]
disable = ["a11y/duplicate-id-active"]

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Disable all Accessibility rules

squirrel.toml
[rules]
disable = ["a11y/*"]

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Enable only this rule

squirrel.toml
[rules]
enable = ["a11y/duplicate-id-active"]
disable = ["*"]