oficina / slides Public

Keep the presence client id across a reload

A reload drew this tab's own previous self as a colleague for ~40 s:
the server held the old client id until its TTL and the new page had a
fresh newClientId(). The id now lives in sessionStorage, one key per
deck (fixtures/client-id.mjs), so a reload reuses it. A duplicated tab
copies sessionStorage, so each tab claims its id on a BroadcastChannel;
a live tab holding it answers and the newcomer switches to a fresh one
(presence.setClientId beats with it at once).

No leave-on-pagehide: the server has no leave route, and with a stable
id a reload no longer needs one.

Node: client-id.test.mjs. Browser: TestBrowserReloadIsNotSomebodyElse.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Paul Campbell pushed by paul@keymail.dev 3 weeks ago 95c1bcff112489dc6b44ce5476855068f50148e2 parent 236128e

6 files changed, +265 −20

fixtures/client-id.mjs +62 −0
fixtures/client-id.test.mjs +107 −0
fixtures/editor-entry.js +20 −1
fixtures/presence.mjs +14 −4
internal/slides/static/{editor.ea69e9f399e840e0.js => editor.94492ae03aa185ba.js} +15 −15
internal/slidestest/browser_editor_presence_test.go +47 −0

fixtures/client-id.mjs

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fixtures/client-id.test.mjs

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fixtures/editor-entry.js

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fixtures/presence.mjs

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internal/slides/static/{editor.ea69e9f399e840e0.js => editor.94492ae03aa185ba.js}

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internal/slidestest/browser_editor_presence_test.go

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