Next.js — engineering articles by Suman Debnath

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26 August 2026·6 min read

Why is my JSON-LD missing from the HTML in Next.js?

Next.js does not emit a script element for a component using next/script with strategy beforeInteractive. It serialises the payload into a self.__next_s array that the client bundle reads after hydration, so JSON-LD declared that way is absent from the served HTML and invisible to any crawler that does not execute JavaScript.

Next.js
Structured Data
AEO
Debugging

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24 August 2026·5 min read

Next.js 16 replaced middleware.ts with proxy.ts

In Next.js 16, middleware.ts is gone. The replacement is proxy.ts at the project root, exporting a function named proxy(request) and a config.matcher, and it runs on the Node runtime rather than Edge. The matcher is read statically at build time, so it cannot reference an imported constant.

Next.js
Migration
Routing

Why is my JSON-LD missing from the HTML in Next.js?

Next.js 16 replaced middleware.ts with proxy.ts

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