10000 Linter Rule: Disallow duplicate id attributes · Issue #183 · marcoroth/herb · GitHub
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Linter Rule: Disallow duplicate id attributes #183
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Linter Rule: Disallow duplicate id attributes#183
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@NotGrm

Description

@NotGrm
NotGrm
opened on Jun 27, 2025

Rule: html-no-duplicate-id

Description

Ensure that id attribute is not duplicated

Rationale

Valid HTML requires that id attribute values are unique

Examples

✅ Good
<div id="footer"></div>
<div id="<%= dom_id(:foobar) %>"></div>
🚫 Bad
<div id="id-00"></div><div id="id-00"></div>
<div id="<%= dom_id(:foobar) %>"></div><div id="<%= dom_id(:foobar) %>"></div>

References

Inspired by ember-template-lint

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