Invalid Option Error thrown with "no-duplicate-selectors" rule.

[james0r]

Clearly describe the bug

Invalid Option Error thrown when using "no-duplicate-selectors": false rule even though the rule seems to take effect on my SCSS with stylelint-scss plugin added.

Which rule, if any, is the bug related to?

no-duplicate-selectors

What code is needed to reproduce the bug?

  extends: "stylelint-config-recommended",
  plugins: [
    /**
     * add plugins
     * docs: https://stylelint.io/user-guide/configure#plugins
     */
    'stylelint-scss'
  ],
  ignoreFiles: [
    /**
     * ignore certain files
     * docs: https://stylelint.io/user-guide/configure#ignorefiles
     */
    // 'my-file.css',
    // '**/my-directory/*.css'
  ],
  rules: {
    /**
     * add custom rules
     * docs: https://stylelint.io/user-guide/rules/list
     */
    "at-rule-no-unknown": null,
    "scss/at-rule-no-unknown": true,
    "no-empty-source": false,
    "no-descending-specificity": null,
    "no-duplicate-selectors": false
  },
};

What stylelint configuration is needed to reproduce the bug?

See above.

Which version of stylelint are you using?

13.10.0

How are you running stylelint: CLI, PostCSS plugin, Node.js API?

Webpack plugin

Does the bug relate to non-standard syntax (e.g. SCSS, Less etc.)?

Yes, SCSS

What did you expect to happen?

Duplicate selectors are ignored and no errors to stdout.

What actually happened (e.g. what warnings or errors did you get)?

Invalid Option: Unexpected option value "false" for rule "no-empty-source"

[hudochenkov]

Thanks for the report and for using the template.

To disable a rule use null, and not false.

[james0r]

Thanks for your reply.

This would be a helpful addition to the detail page for this rule and perhaps others.

https://stylelint.io/user-guide/rules/no-duplicate-selectors

I do not see the null value indicated anywhere there.

To add to the confusion the nested option takes 'false'.