SEO016 · JSON-LD validity

Severity: warning

What it checks

For each static <script type="application/ld+json">, the content must parse as JSON and contain both @context and @type. Invalid or incomplete JSON-LD is flagged. A dynamically-built JSON-LD is not checked in static mode.

Why it matters

Invalid JSON-LD — unparseable, or missing @context/@type — is silently ignored by search engines, so the structured data does nothing.

How to fix

<svelte:head>
  <script type="application/ld+json">
    { "@context": "https://schema.org", "@type": "WebPage", "name": "…" }
  </script>
</svelte:head>