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no-extra-selected-options

Per HTML Living Standard §4.10.7 (the select element), a <select> element without the multiple attribute may have at most one option in its list of options whose selected attribute is set.

The "list of options" covers direct <option> children of <select> and <option> children of any <optgroup> children.

❌ Examples of incorrect code for this rule

<select>
  <option selected>One</option>
  <option selected>Two</option>
</select>

✅ Examples of correct code for this rule

<select>
  <option selected>One</option>
  <option>Two</option>
</select>
<select multiple>
  <option selected>One</option>
  <option selected>Two</option>
</select>

Interface​

{
  "no-extra-selected-options": boolean
}

Disallow multiple selected option elements in a select that lacks the multiple attribute.

Default Severity​

error