Add JSON-LD Without Turning CMS Text into Executable Markup

Example: an article title contains unusual text

A title copied from a code example could include characters that matter to the surrounding HTML parser. The page should still display its intended text and emit data, not create a new executable script or break the document. Test a benign markup-like fixture without publishing it as real editorial content.

Validate both syntax and meaning

Inspect the rendered script, parse the JSON and use the relevant structured-data testing tools. Then compare every important value with the visible page. Passing a syntax check does not establish eligibility for a search feature.

Keep schema changes focused on accuracy. Useful metadata is a faithful description of the article, not a substitute for the article's content or a guarantee of rich search results.

Related practical guides

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Primary reference and editorial scope

Primary reference: nextjs.org

Prepared on October 18, 2026. This is a source-referenced practical guide with illustrative examples, not a claim of hands-on product testing. Check current platform documentation before changing a live site.