feat: add support for Streaming SSR#2419

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brandonroberts wants to merge 49 commits into

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feat/streaming-ssr

Commits on Jul 6, 2026

feat(router): add renderToString() with string-based SSR renderer

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fix(router): add location and children to DOM shim, add benchmarks

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refactor(router): extract resetComponentDefTViews to shared util

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fix(router): scope renderToString providers to app injector

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fix(router): correct text escaping and serialization in SSR string renderer

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test(router): add specs for SSR dom-shim and string renderer

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perf(router): prototype lazy-string element layout for SSR renderer

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perf(router): tighten V2 serialize and dedicate class/style slots

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perf(router): prototype renderToStringFast with cached platform

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test(router): document renderToStringFast parity gaps and add parity-check script

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fix(router): wire hydration, server-context, and TransferState into renderToStringFast

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fix(router): emit empty SSR attrs as `name=""` to match Domino

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fix(router): lowercase HTML attribute names in SSR string renderer

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feat(router): wire view encapsulation into SSR string renderer

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refactor(router): consolidate SSR string renderers into single renderToString

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fix(router): attach benchmark tree to renderer root so serialize benches measure real work

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fix(router): expose DOM node surface on string renderer tokens for hydration annotation

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chore: make analog-app SSR scripts exit cleanly and surface render errors

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docs: add RFC for the fast SSR string renderer

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refactor(router): remove unwired ServerSharedStylesHost

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feat(router): add experimental renderStream progressive streaming SSR renderer

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feat(vite-plugin-nitro): add ssrStreamRenderer h3 handler template

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feat(platform): add deferStreamingPlugin to patch @angular/core for streaming SSR

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feat(platform): add experimental.streaming option to enable defer streaming plugin

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docs(router): add RFC for progressive streaming SSR

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fix(router): route renderStream @defer capture per-render for concurrency safety

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feat(platform): warn when the defer streaming patch cannot be applied

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docs(router): note Nitro-delegated runtime portability + hardening in RFC

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fix(router): dedupe @defer stream captures per render

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feat(vite-plugin-nitro): select streaming renderer via experimental.streaming

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test: add end-to-end progressive streaming SSR app

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feat(router): reconcile dynamic head and buffer for crawlers in renderStream

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docs(router): add streaming SSR sequence diagram and head/title handling

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feat(platform): gate experimental streaming SSR on Angular v21+

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docs(router): note the Angular v21+ floor for streaming SSR

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refactor(router): remove the experimental fast SSR string renderer

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feat: disable streaming per route via a streaming:false route rule

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test: add a streaming-disabled route to the streaming-app

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docs(router): document the per-route streaming opt-out

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docs: add Streaming SSR page

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refactor(router): remove the experimental server components feature

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docs: polish the Streaming SSR page

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test(router): unit-test streaming helpers and the client reconcile runtime

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docs(router): reconcile the streaming SSR RFC validation section

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Commits on Jul 7, 2026