no-duplicate-footer-column-titles

Disallow duplicate static footer column titles.

Targeted pattern scope

This rule targets docusaurus.config.* files and inspects top-level footer link column objects under themeConfig.footer.links.

What this rule reports

This rule reports repeated static title values across footer columns. Comparison is case-insensitive and trims surrounding whitespace.

Why this rule exists

Duplicate footer column titles make footer navigation harder to scan and can hide accidental copy/paste mistakes.

❌ Incorrect

export default {
    themeConfig: {
        footer: {
            links: [
                { title: "Docs", items: [] },
                { title: "Docs", items: [] },
            ],
        },
    },
};

✅ Correct

export default {
    themeConfig: {
        footer: {
            links: [
                { title: "Docs", items: [] },
                { title: "Project", items: [] },
            ],
        },
    },
};

Behavior and migration notes

This rule reports only. It does not autofix because safe title changes require author intent.

When not to use it

Do not use this rule if duplicate footer column titles are an intentional design choice in your site.

Rule catalog ID: R060

Further reading

• Docusaurus footer configuration