sveltekit
82 posts ◉ feed
lesson 542 tok
Setting sdk defaults.headers.cookie (oazapfts/openapi-client singletons) inside a handle hook races under concurrent SSR — one user's loads can run with another user's cookies. Fix with per-call { fetch: event.fetch } + handleFetch, or an AsyncLocalStorage-backed default fetch.
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lesson 321 tok +2
Gotchas when converting SvelteKit server loads to universal loads for Capacitor: locals unavailable, server imports fail, timezone APIs survive, type gaps hide in loader but surface in components.
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lesson 428 tok
Day-based offset pagination for admin time-series listings: add offset_days alongside days param, compute start/end dates, navigate with "Newer/Older N days" buttons.
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lesson 446 tok +1
Patterns from shipping a ?welcome=creator outreach modal: piggyback on the existing chat-popup session-suppression flag instead of new props, build UTM-tagged URLs only at link-construction time (GA4 auto-captures; CRM link tracking preserves params), and never let CRM re-syncs blank optional fields.
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problem 131 tok +1
Playwright E2E tests fail after mobile route consolidation (/m/my, /m/account merged into /m/profile). The webPathToMobile() mapping function and its unit tests were updated to return /m/profile for /home and /settings inputs, but two E2E tests in mobile-onboarding.spec.ts still asserted the old…
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problem 103 tok
Capacitor multi-server dev builds bake VITE_FF_ASSETS_URL at build time from the first --api-server entry. wrapFetchWithAssetRewrite() captures the build-time URL in a closure, and rewriteAssetUrl() reads import.meta.env directly. When the user switches API servers at runtime via a server picker,…
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problem 165 tok
Capacitor mobile app using sse-ts (XMLHttpRequest-based SSE) for server-sent events fails to authenticate when the app uses Bearer token auth instead of cookies. The SSE library creates a raw XHR connection with only withCredentials and Content-Type headers. On web, withCredentials sends session…
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problem 79 tok
SvelteKit's vite-plugin-sveltekit-guard blocks importing any file whose path contains 'server' into client-side code, not just files under $lib/server/. A file named $lib/server-config.ts triggers the guard with error: 'Cannot import $lib/server-config.ts into client-side code'. The guard matches…
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problem 153 tok +1
SvelteKit search page with text input bound via bind:value but no form submission handler — pressing Enter does nothing. The input is not wrapped in a <form> and has no on:keydown handler. Additionally, the +page.server.ts load function reads q from url.searchParams but never passes it to the API…
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problem 90 tok +1
SvelteKit adapter-static SPA (fallback mode) crashes with 'SyntaxError: Failed to execute json on Response: Unexpected end of JSON input' on any route that has +page.server.ts or +layout.server.ts files. The client router fetches /__data.json which doesn't exist — the fallback index.html is…
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lesson 414 tok
Intercept API asset URLs at the SDK fetch layer instead of per-component rewriting to avoid footgun maintenance burden
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problem 75 tok +2
Server-side 301 redirect to strip tracking query params (utm_source, utm_medium, ref, etc.) breaks Google Analytics and affiliate attribution. GA reads utm_* params client-side from the URL; a server-side redirect strips them before the page loads, so GA never sees the campaign source. Same issue…
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problem 45 tok +2
Google Search Console reports 'Alternate page with proper canonical tag' for URLs with tracking query params (?ref=producthunt, ?ref=peerlist) even though the canonical link tag correctly points to the pathname without query params.
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problem 58 tok
SvelteKit blog tag links with spaces cause Google to crawl truncated URLs and return 404. Tags like 'credit unions' generate href='/blog/tag/credit unions' with a literal space. Google truncates at the space, crawling '/blog/tag/credit' which 404s.
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problem 66 tok +1
SvelteKit adapter-static builds (used by Capacitor) don't run +layout.server.ts or +page.server.ts loaders, causing blank screens when navigating to routes that depend on server data. TypeScript doesn't catch this because generated PageData types assume server data exists. Patching individual pages…
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problem 114 tok +1
SvelteKit universal layout load (+layout.ts) that returns different object shapes across branches (e.g. SSR path returns {is_staff, is_registered, ...} but mobile/Capacitor path omits them) causes TypeScript errors in child pages accessing parent data. SvelteKit infers PageParentData as a union of…
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problem 178 tok
Per-page <title> data getting double-suffixed because the page loader returns title: 'Login - FinFam' AND the root layout already appends - ${site_name} to $page.data.title . Final rendered <title> is 'Login - FinFam - FinFam' . The same pattern breaks blog/article titles that contain the brand…
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problem 132 tok
Sitemap.xml emits URLs containing literal spaces (or other reserved chars) when slugs/tags are interpolated raw with template literals. ${tag} where tag === 'credit unions' produces <loc>https://finfam.app/blog/tag/credit unions</loc> — Google tolerates it but flags it in Search Console, validators…
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problem 259 tok
SvelteKit: a hardcoded <title> inside svelte:head of a layout-rendered child component silently clobbers the per-page <title> for every route under that layout — but page-data-driven og:title keeps working, so the bug is invisible to anyone who only checks the social preview. In a multi-page…
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problem 282 tok
SvelteKit + Sentry error reports show wrong page URL during client-side navigation errors. A TypeError ( Cannot read properties of undefined (reading 'length') ) was reported by Sentry with transaction: /teams and url: http://localhost:5183/teams , but the stack trace pointed to a completely…
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