[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"verticals":3,"playground-nuxt-weekly-nuxt-server-import-boundary":44,"search-suggestions":58},[4,20,32],{"id":5,"slug":6,"name":7,"tagline":8,"description":9,"accentFrom":10,"accentTo":11,"icon":12,"defaultLocale":13,"locales":14,"features":16,"position":19},"019fe637-3d33-714b-b57f-23e163ffca0c","dev","Web Development","Read it. Run it. Prove it.","A post a day on modern web development — most with an editable playground and a quiz that explains every answer. Free, no account needed.","violet-500","cyan-400","◇","en",[13,15],"fa",{"courses":17,"paths":17,"articles":17,"exams":18,"flashcards":18,"packages":17,"community":17,"certificates":17,"teams":17,"commerce":17},true,false,0,{"id":21,"slug":22,"name":23,"tagline":24,"description":25,"accentFrom":26,"accentTo":10,"icon":27,"defaultLocale":13,"locales":28,"features":30,"position":31},"019fe637-3dc2-754c-8657-0f175bfee7c6","lang","Languages","Learn a language the way you learn a codebase.","Grammar explained the way good documentation explains an API — one idea at a time, each with a quiz.","amber-400","⌘",[13,15,29],"es",{"courses":18,"paths":18,"articles":17,"exams":18,"flashcards":17,"packages":18,"community":17,"certificates":17,"teams":18,"commerce":18},2,{"id":33,"slug":34,"name":35,"tagline":36,"description":37,"accentFrom":38,"accentTo":39,"icon":40,"defaultLocale":13,"locales":41,"features":42,"position":43},"7b3c16f2-931d-410e-802e-e1fa4edab7de","soft","Soft Skills","The half of the job nobody wrote documentation for.","Weekly, on the parts of working life that decide more than your code does — first weeks, meetings, interviews, promotions, and the people around you. Written from what actually happens, and recorded as a podcast you can listen to on the walk.","emerald-400","teal-300","◉",[13],{"courses":18,"paths":18,"articles":17,"exams":18,"flashcards":18,"packages":18,"community":17,"certificates":18,"teams":18,"commerce":18},3,{"slug":45,"title":46,"summary":47,"html":48,"css":49,"js":50,"config":51,"doc":53},"nuxt-weekly-nuxt-server-import-boundary","Nuxt 4.6 nuxt\u002Fserver — import-boundary playground",null,"\u003Cdiv class=\"pg\">\n    \u003Ch1 class=\"pg-title\">🎮 The nuxt\u002Fserver import boundary\u003C\u002Fh1>\n    \u003Cp class=\"pg-sub\">\n      Three real rules from Nuxt 4.6's release notes, modeled as plain JS — there's no\n      actual Nuxt build or server engine running on this page, so each tab says exactly\n      what it's standing in for.\n    \u003C\u002Fp>\n\n    \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">1\u003C\u002Fspan> Pick what to explore\u003C\u002Fdiv>\n    \u003Cdiv class=\"seg\" id=\"tabSeg\" style=\"flex-wrap:wrap;\">\n      \u003Cbutton type=\"button\" aria-pressed=\"true\" data-val=\"mix\">Mix imports → NUXT_E8012\u003C\u002Fbutton>\n      \u003Cbutton type=\"button\" aria-pressed=\"false\" data-val=\"redirect\">sendRedirect contract\u003C\u002Fbutton>\n      \u003Cbutton type=\"button\" aria-pressed=\"false\" data-val=\"portable\">Portable across builders\u003C\u002Fbutton>\n    \u003C\u002Fdiv>\n\n    \u003C!-- MIX TAB -->\n    \u003Cdiv class=\"panel\" id=\"tab-mix\">\n      \u003Cdiv class=\"banner info show\">Modeled runtime check — no real Nuxt server runs here. This reproduces the exact rule: nuxt\u002Fserver's session helpers throw NUXT_E8012 when called with an event that didn't come from nuxt\u002Fserver's own defineEventHandler.\u003C\u002Fdiv>\n      \u003Cdiv class=\"panel-label\" style=\"margin-top:12px;\">\u003Cspan class=\"n\">2\u003C\u002Fspan> Hit server\u002Fapi\u002Fprofile.get.ts and see what the session helper does\u003C\u002Fdiv>\n      \u003Cp class=\"hint\" style=\"margin-top:0\">Pick where \u003Ccode>defineEventHandler\u003C\u002Fcode> comes from, and whether the handler calls \u003Ccode>useSession\u003C\u002Fcode> from \u003Ccode>nuxt\u002Fserver\u003C\u002Fcode>, then \"hit\" the route. \u003Ccode>getRouterParam\u003C\u002Fcode> never throws \u003Ccode>NUXT_E8012\u003C\u002Fcode> either way — it isn't part of this check, and it behaves identically from either import source.\u003C\u002Fp>\n      \u003Cdiv class=\"row\" style=\"gap:10px; flex-wrap: wrap;\">\n        \u003Cdiv class=\"field\">\n          \u003Cspan class=\"ctl-label\">defineEventHandler from\u003C\u002Fspan>\n          \u003Cselect class=\"pg-select\" id=\"srcHandler\">\n            \u003Coption value=\"auto\" selected>auto-import (h3)\u003C\u002Foption>\n            \u003Coption value=\"nuxtserver\">nuxt\u002Fserver (explicit)\u003C\u002Foption>\n          \u003C\u002Fselect>\n        \u003C\u002Fdiv>\n        \u003Cdiv class=\"field\">\n          \u003Cspan class=\"ctl-label\">Call useSession() from nuxt\u002Fserver?\u003C\u002Fspan>\n          \u003Cselect class=\"pg-select\" id=\"srcParam\">\n            \u003Coption value=\"auto\" selected>No — handler doesn't touch sessions\u003C\u002Foption>\n            \u003Coption value=\"nuxtserver\">Yes — reads the session\u003C\u002Foption>\n          \u003C\u002Fselect>\n        \u003C\u002Fdiv>\n        \u003Cdiv class=\"field\">\n          \u003Cspan class=\"ctl-label\"> \u003C\u002Fspan>\n          \u003Cbutton class=\"btn primary\" id=\"mixRun\">▶️ Hit GET \u002Fapi\u002Fprofile.get\u003C\u002Fbutton>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"output\" style=\"margin-top:10px;\">\n        \u003Cdiv class=\"log\" id=\"mixLog\">Pick a defineEventHandler source and whether useSession is called, then hit the route.\u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003C!-- REDIRECT TAB -->\n    \u003Cdiv class=\"panel\" id=\"tab-redirect\" style=\"display:none;\">\n      \u003Cdiv class=\"banner info show\">Modeled handler output — no real HTTP response is sent. The behavior shown is what the release notes document for each source.\u003C\u002Fdiv>\n      \u003Cdiv class=\"panel-label\" style=\"margin-top:12px;\">\u003Cspan class=\"n\">2\u003C\u002Fspan> Call sendRedirect from each source, without a return\u003C\u002Fdiv>\n      \u003Cdiv class=\"btn-row\">\n        \u003Cbutton class=\"btn\" id=\"redirectAuto\" aria-pressed=\"true\">h3 auto-import\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn\" id=\"redirectNuxtServer\" aria-pressed=\"false\">nuxt\u002Fserver (explicit)\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cp class=\"hint\">Both handlers call \u003Ccode>sendRedirect(event, '\u002Flogin')\u003C\u002Fcode> and then simply end, without a \u003Ccode>return\u003C\u002Fcode> — see what each one still manages to send.\u003C\u002Fp>\n      \u003Cdiv class=\"output\" style=\"margin-top:10px;\">\n        \u003Cdiv class=\"log\" id=\"redirectLog\">Pick a source above.\u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003C!-- PORTABLE TAB -->\n    \u003Cdiv class=\"panel\" id=\"tab-portable\" style=\"display:none;\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> Which handler survives a server-builder swap?\u003C\u002Fdiv>\n      \u003Cp class=\"hint\" style=\"margin-top:0\">\n        Pick a server builder, then see which of the two handler styles from the article\n        keeps working unchanged. This models the release notes' forward-compat claim —\n        it isn't an actual multi-engine build.\n      \u003C\u002Fp>\n      \u003Cdiv class=\"field\" style=\"max-width:260px;\">\n        \u003Cspan class=\"ctl-label\">Server builder\u003C\u002Fspan>\n        \u003Cselect class=\"pg-select\" id=\"builderSelect\">\n          \u003Coption value=\"nitro2\" selected>Nitro v2 (Nuxt 4.6 today)\u003C\u002Foption>\n          \u003Coption value=\"vite\">@nuxt\u002Fvite-server (experimental)\u003C\u002Foption>\n          \u003Coption value=\"nitro3\">Nitro v3 + h3 v2 (Nuxt 5, future)\u003C\u002Foption>\n        \u003C\u002Fselect>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"builder-grid\" id=\"builderGrid\">\u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"hint\">\n      This models the session-helper boundary that throws NUXT_E8012, the createError contract\n      difference and what sendRedirect actually sends without a return, and the forward-compat\n      claim from the Nuxt 4.6 release notes — not a running Nuxt\u002FNitro process.\n    \u003C\u002Fdiv>\n  \u003C\u002Fdiv>","\u002F*\n * Shared playground design system — daily-post\n * ============================================\n * Link it from any post's playground\u002Findex.html (no per-post boilerplate):\n *\n *   \u003Clink rel=\"stylesheet\" href=\"..\u002F..\u002F..\u002Fplayground\u002Fassets\u002Fbase.css\" \u002F>\n *\n * The relative path resolves the same locally (posts\u002F\u003Cbase>\u002Fplayground\u002F) and on\n * the deployed host (public\u002Fposts\u002F\u003Cbase>\u002Fplayground\u002F), because build-site.js\n * mirrors this file to public\u002Fplayground\u002Fassets\u002Fbase.css. For a CodeSandbox\n * --embed, playground.js inlines this file so the single-file sandbox still styles.\n *\n * Then write ONLY the demo-specific CSS in your inline \u003Cstyle>. Everything below\n * — tokens, layout, panels, buttons, toggles, sliders, code blocks, status\u002Flog,\n * banners, presets — comes for free and looks consistent across every post.\n *\n * Theme-aware: dark by default, light via prefers-color-scheme AND a\n * [data-theme] override on \u003Chtml> (so a toggle can force either). Accessible:\n * real focus rings, adequate contrast, reduced-motion honored.\n *\u002F\n\n\u002F* ---------- design tokens ---------- *\u002F\n:root {\n  --bg: #0d1117;\n  --bg-grid: #ffffff0a;\n  --panel: #161b22;\n  --panel-2: #0b0e14;\n  --card: #0b0e14;\n  --ink: #e8ebf2;\n  --muted: #9aa4b2;\n  --faint: #6b7688;\n  --line: #232a35;\n  --line-soft: #ffffff12;\n  --accent: #7c9cff;\n  --accent-ink: #0b0e14;\n  --good: #3fb950;\n  --warn: #f0883e;\n  --bad: #f85149;\n  --info: #58a6ff;\n  --radius: 14px;\n  --radius-sm: 9px;\n  --shadow: 0 8px 30px #0006;\n  --shadow-sm: 0 4px 14px #0005;\n  --mono: ui-monospace, SFMono-Regular, \"SF Mono\", Menlo, Consolas, \"Liberation Mono\", monospace;\n  --sans: ui-sans-serif, system-ui, -apple-system, \"Segoe UI\", Roboto, \"Helvetica Neue\", sans-serif;\n  color-scheme: dark;\n}\n\n\u002F* Light theme — system preference, overridable by [data-theme] on \u003Chtml>. *\u002F\n@media (prefers-color-scheme: light) {\n  :root:not([data-theme=\"dark\"]) {\n    --bg: #f4f6fb;\n    --bg-grid: #00000008;\n    --panel: #ffffff;\n    --panel-2: #f0f3f9;\n    --card: #f7f9fc;\n    --ink: #131722;\n    --muted: #5b6472;\n    --faint: #8a93a3;\n    --line: #e2e7f0;\n    --line-soft: #00000010;\n    --accent: #2f6df0;\n    --accent-ink: #ffffff;\n    --good: #1a7f37;\n    --warn: #bc4c00;\n    --bad: #cf222e;\n    --info: #0969da;\n    --shadow: 0 8px 30px #0000001f;\n    --shadow-sm: 0 4px 14px #00000014;\n    color-scheme: light;\n  }\n}\n:root[data-theme=\"light\"] {\n  --bg: #f4f6fb;\n  --bg-grid: #00000008;\n  --panel: #ffffff;\n  --panel-2: #f0f3f9;\n  --card: #f7f9fc;\n  --ink: #131722;\n  --muted: #5b6472;\n  --faint: #8a93a3;\n  --line: #e2e7f0;\n  --line-soft: #00000010;\n  --accent: #2f6df0;\n  --accent-ink: #ffffff;\n  --good: #1a7f37;\n  --warn: #bc4c00;\n  --bad: #cf222e;\n  --info: #0969da;\n  --shadow: 0 8px 30px #0000001f;\n  --shadow-sm: 0 4px 14px #00000014;\n  color-scheme: light;\n}\n\n\u002F* ---------- reset & base ---------- *\u002F\n*, *::before, *::after { box-sizing: border-box; }\n\nbody {\n  margin: 0;\n  min-height: 100vh;\n  font-family: var(--sans);\n  color: var(--ink);\n  background:\n    radial-gradient(circle at 1px 1px, var(--bg-grid) 1px, transparent 0) 0 0 \u002F 24px 24px,\n    var(--bg);\n  display: flex;\n  justify-content: center;\n  align-items: flex-start;\n  padding: clamp(14px, 3vw, 26px);\n  line-height: 1.55;\n  -webkit-font-smoothing: antialiased;\n  text-rendering: optimizeLegibility;\n}\n\n\u002F* The single content column. *\u002F\n.pg {\n  width: 100%;\n  max-width: 860px;\n}\n\n\u002F* ---------- header ---------- *\u002F\n.pg-title {\n  font-size: clamp(1.15rem, 1rem + 1vw, 1.4rem);\n  font-weight: 800;\n  letter-spacing: -0.02em;\n  margin: 0 0 4px;\n  display: flex;\n  align-items: center;\n  gap: 9px;\n}\n.pg-sub {\n  color: var(--muted);\n  font-size: 0.92rem;\n  line-height: 1.5;\n  margin: 0 0 16px;\n  max-width: 66ch;\n}\n.pg-sub strong, .pg-sub b { color: var(--ink); font-weight: 700; }\n.pg-sub code { font-family: var(--mono); background: var(--line-soft); color: var(--accent);\n  padding: 1px 6px; border-radius: 6px; font-size: 0.85em; }\n\n\u002F* ---------- panels ---------- *\u002F\n.panel {\n  background: var(--panel);\n  border: 1px solid var(--line);\n  border-radius: var(--radius);\n  padding: 16px 18px;\n  margin-bottom: 14px;\n  box-shadow: var(--shadow-sm);\n}\n.panel-label {\n  font-size: 0.7rem;\n  text-transform: uppercase;\n  letter-spacing: 0.08em;\n  color: var(--muted);\n  font-weight: 800;\n  margin: 0 0 13px;\n  display: flex;\n  align-items: center;\n  gap: 8px;\n}\n.panel-label .n {\n  display: inline-grid; place-items: center;\n  width: 18px; height: 18px; border-radius: 50%;\n  background: var(--accent); color: var(--accent-ink);\n  font-size: 0.66rem; font-weight: 800;\n}\n\n\u002F* ---------- layout helpers ---------- *\u002F\n.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }\n.row.between { justify-content: space-between; }\n.col { display: flex; flex-direction: column; gap: 10px; }\n.grow { flex: 1 1 0; min-width: 0; }\n.wrap-controls { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: flex-end; }\n.field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }\n.field > .label, .ctl-label {\n  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em;\n  color: var(--muted); font-weight: 800;\n}\n\n\u002F* ---------- buttons ---------- *\u002F\n.btn {\n  font: inherit; font-weight: 650; font-size: 0.88rem;\n  cursor: pointer; user-select: none;\n  border: 1px solid var(--line);\n  background: var(--card); color: var(--ink);\n  padding: 9px 15px; border-radius: var(--radius-sm);\n  display: inline-flex; align-items: center; gap: 8px;\n  transition: background .15s ease, border-color .15s ease, transform .05s ease, color .15s ease;\n}\n.btn:hover { background: var(--line-soft); border-color: var(--muted); }\n.btn:active { transform: translateY(1px); }\n.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }\n.btn[disabled] { opacity: 0.45; cursor: not-allowed; }\n.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }\n.btn.primary:hover { filter: brightness(1.08); background: var(--accent); }\n.btn.good { background: var(--good); border-color: var(--good); color: #04140a; }\n.btn.bad  { background: var(--bad);  border-color: var(--bad);  color: #fff; }\n.btn.ghost { background: transparent; }\n.btn.sm { padding: 6px 11px; font-size: 0.82rem; }\n\n.btn-row { display: flex; flex-wrap: wrap; gap: 9px; }\n\n\u002F* Segmented control — a row of buttons where one is active (aria-pressed). *\u002F\n.seg { display: inline-flex; background: var(--card); border: 1px solid var(--line);\n  border-radius: var(--radius-sm); padding: 3px; gap: 3px; }\n.seg button {\n  font: inherit; font-weight: 650; font-size: 0.84rem; cursor: pointer;\n  border: none; background: transparent; color: var(--muted);\n  padding: 7px 13px; border-radius: 7px;\n  transition: background .15s ease, color .15s ease;\n}\n.seg button:hover { color: var(--ink); }\n.seg button[aria-pressed=\"true\"] { background: var(--accent); color: var(--accent-ink); }\n.seg button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }\n\n\u002F* Preset chips — worked-example shortcuts. *\u002F\n.presets { display: flex; flex-wrap: wrap; gap: 8px; }\n.presets .btn { background: var(--panel-2); }\n\n\u002F* ---------- toggle switch ---------- *\u002F\n.toggle { display: inline-flex; align-items: center; gap: 10px; cursor: pointer;\n  font-size: 0.88rem; font-weight: 600; user-select: none; }\n.toggle input { position: absolute; opacity: 0; width: 0; height: 0; }\n.switch { position: relative; width: 44px; height: 25px; border-radius: 999px; flex: none;\n  background: var(--line); border: 1px solid var(--line); transition: background .18s ease; }\n.switch::after { content: \"\"; position: absolute; top: 2px; left: 2px; width: 19px; height: 19px;\n  border-radius: 50%; background: #cfd6e4; transition: transform .18s ease; box-shadow: 0 1px 3px #0006; }\n.toggle input:checked + .switch { background: var(--good); border-color: var(--good); }\n.toggle input:checked + .switch::after { transform: translateX(19px); background: #fff; }\n.toggle input:focus-visible + .switch { outline: 2px solid var(--accent); outline-offset: 2px; }\n\n\u002F* ---------- range slider ---------- *\u002F\ninput[type=\"range\"] {\n  -webkit-appearance: none; appearance: none; width: 100%; height: 6px;\n  background: var(--line); border-radius: 999px; outline: none; cursor: pointer; margin: 8px 0;\n}\ninput[type=\"range\"]::-webkit-slider-thumb {\n  -webkit-appearance: none; appearance: none; width: 19px; height: 19px; border-radius: 50%;\n  background: var(--accent); border: 2px solid var(--panel); box-shadow: var(--shadow-sm); cursor: pointer;\n}\ninput[type=\"range\"]::-moz-range-thumb {\n  width: 19px; height: 19px; border-radius: 50%; background: var(--accent);\n  border: 2px solid var(--panel); box-shadow: var(--shadow-sm); cursor: pointer;\n}\ninput[type=\"range\"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }\n\n\u002F* ---------- text inputs \u002F selects ---------- *\u002F\ninput[type=\"text\"], input[type=\"number\"], input[type=\"search\"], select, textarea {\n  font: inherit; color: var(--ink); background: var(--card);\n  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 8px 11px; width: 100%;\n}\ntextarea { font-family: var(--mono); font-size: 0.85rem; line-height: 1.6; resize: vertical; }\ninput:focus-visible, select:focus-visible, textarea:focus-visible {\n  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);\n}\n\n\u002F* ---------- status \u002F output \u002F log ---------- *\u002F\n.status {\n  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;\n  font-size: 0.9rem; font-weight: 600;\n  padding: 11px 14px; border-radius: var(--radius-sm);\n  background: var(--panel-2); border: 1px solid var(--line); color: var(--ink);\n}\n.status.good { border-color: color-mix(in srgb, var(--good) 55%, var(--line)); }\n.status.warn { border-color: color-mix(in srgb, var(--warn) 55%, var(--line)); }\n.status.bad  { border-color: color-mix(in srgb, var(--bad) 55%, var(--line)); }\n.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); flex: none; }\n.dot.good { background: var(--good); } .dot.warn { background: var(--warn); }\n.dot.bad { background: var(--bad); } .dot.info { background: var(--info); }\n\n.output { background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm);\n  padding: 13px 15px; }\n.log { font-family: var(--mono); font-size: 0.8rem; line-height: 1.7; background: var(--card);\n  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 11px 14px;\n  max-height: 220px; overflow-y: auto; white-space: pre-wrap; }\n\n\u002F* ---------- code block + syntax tokens ---------- *\u002F\n.code {\n  font-family: var(--mono); font-size: 0.82rem; line-height: 1.7;\n  background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm);\n  padding: 13px 15px; overflow-x: auto; white-space: pre; tab-size: 2;\n}\n.code .tok-sel  { color: var(--accent); }\n.code .tok-prop { color: #86e29b; }\n.code .tok-kw   { color: #ff9bcb; }\n.code .tok-str  { color: #f0c674; }\n.code .tok-num  { color: #f0883e; }\n.code .tok-cmt  { color: var(--faint); font-style: italic; }\n.code .hl { background: color-mix(in srgb, var(--good) 22%, transparent); border-radius: 4px; padding: 0 3px; }\n\n\u002F* ---------- hint \u002F caption ---------- *\u002F\n.hint { font-size: 0.83rem; color: var(--muted); line-height: 1.55; margin: 10px 0 0; }\n.hint code { font-family: var(--mono); color: var(--ink); background: var(--line-soft);\n  padding: 1px 5px; border-radius: 5px; font-size: 0.86em; }\n.hint strong { color: var(--ink); }\n\n\u002F* ---------- banner (feature-support \u002F notices) ---------- *\u002F\n.banner {\n  display: none; margin-bottom: 14px; padding: 11px 14px; border-radius: 11px;\n  font-size: 0.85rem; line-height: 1.5;\n  color: var(--ink); background: color-mix(in srgb, var(--warn) 12%, var(--panel));\n  border: 1px solid color-mix(in srgb, var(--warn) 45%, var(--line));\n}\n.banner.show { display: block; }\n.banner.info { background: color-mix(in srgb, var(--info) 12%, var(--panel));\n  border-color: color-mix(in srgb, var(--info) 45%, var(--line)); }\n.banner code { font-family: var(--mono); background: var(--line-soft); padding: 1px 5px; border-radius: 5px; }\n\n\u002F* ---------- misc atoms ---------- *\u002F\n.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 0.75rem; font-weight: 700;\n  padding: 3px 9px; border-radius: 999px; background: var(--line-soft); color: var(--muted); }\n.pill.good { color: var(--good); background: color-mix(in srgb, var(--good) 16%, transparent); }\n.pill.bad  { color: var(--bad);  background: color-mix(in srgb, var(--bad) 16%, transparent); }\n.mono { font-family: var(--mono); }\n.muted { color: var(--muted); }\n.big-num { font-family: var(--mono); font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; }\n\n\u002F* Optional theme toggle button (top-right). Wire it in JS if you want it. *\u002F\n.theme-btn { position: fixed; top: 12px; right: 12px; z-index: 20; }\n\n\u002F* ---------- responsive ---------- *\u002F\n@media (max-width: 560px) {\n  .panel { padding: 14px; }\n  .wrap-controls { gap: 14px; }\n  .btn { padding: 9px 13px; }\n}\n\n\u002F* ---------- reduced motion ---------- *\u002F\n@media (prefers-reduced-motion: reduce) {\n  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }\n}\n\n\n.import-row {\n    display: flex; align-items: center; justify-content: space-between; gap: 10px;\n    border: 1px solid var(--line); border-radius: var(--radius-sm);\n    padding: 8px 12px; background: var(--panel-2);\n    font-family: var(--mono); font-size: 0.82rem;\n  }\n  .import-row + .import-row { margin-top: 6px; }\n  select.pg-select {\n    font: inherit; background: var(--card); color: var(--ink);\n    border: 1px solid var(--line); border-radius: var(--radius-sm);\n    padding: 6px 10px;\n  }\n  .console-line { display: block; white-space: pre-wrap; }\n  .console-line.err { color: #f87171; }\n  .console-line.ok { color: #34d399; }\n  .console-line.dim { color: var(--muted); }\n  .builder-grid { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }\n  .builder-row {\n    display: flex; align-items: center; gap: 10px;\n    border: 1px dashed var(--line); border-radius: var(--radius-sm);\n    padding: 8px 10px; font-family: var(--mono); font-size: 0.8rem;\n    background: var(--panel-2);\n  }\n  .builder-row .pill {\n    border-radius: 999px; padding: 2px 9px; font-size: 0.72rem; font-family: var(--sans);\n  }\n  .pill.good { background: color-mix(in oklab, var(--good) 22%, transparent); color: var(--good); }\n  .pill.bad { background: color-mix(in oklab, var(--bad) 22%, transparent); color: var(--bad); }","(function () {\n  \u002F\u002F ---------- tabs ----------\n  var tabSeg = document.getElementById('tabSeg');\n  var tabs = { mix: document.getElementById('tab-mix'), redirect: document.getElementById('tab-redirect'), portable: document.getElementById('tab-portable') };\n  tabSeg.addEventListener('click', function (e) {\n    var btn = e.target.closest('button[data-val]');\n    if (!btn) return;\n    Array.prototype.forEach.call(tabSeg.querySelectorAll('button'), function (b) { b.setAttribute('aria-pressed', String(b === btn)); });\n    Object.keys(tabs).forEach(function (k) { tabs[k].style.display = (k === btn.dataset.val) ? '' : 'none'; });\n  });\n\n  \u002F\u002F ---------- mix → NUXT_E8012 (the real rule, modeled) ----------\n  \u002F\u002F NUXT_E8012 is thrown from inside nuxt\u002Fserver's session helpers (useSession,\n  \u002F\u002F getSession, updateSession, clearSession) when the event they're handed wasn't\n  \u002F\u002F built by nuxt\u002Fserver's own defineEventHandler. It's a runtime check, triggered\n  \u002F\u002F only when the helper is actually called — not a static, file-level import rule,\n  \u002F\u002F and it has nothing to do with getRouterParam (which doesn't check the event's\n  \u002F\u002F source, and behaves identically from either source anyway).\n  document.getElementById('mixRun').addEventListener('click', function () {\n    var handlerSrc = document.getElementById('srcHandler').value;\n    var callsSession = document.getElementById('srcParam').value === 'nuxtserver';\n    var log = document.getElementById('mixLog');\n    var lines = [\n      '\u003Cspan class=\"console-line dim\">import { ' + (handlerSrc === 'nuxtserver' ? 'defineEventHandler' : '\u002F* auto-imported *\u002F defineEventHandler') + (callsSession ? ', useSession' : '') + ' } '\n        + (handlerSrc === 'nuxtserver' || callsSession ? \"from 'nuxt\u002Fserver'\" : '') + '\u003C\u002Fspan>',\n      '\u003Cspan class=\"console-line dim\">export default defineEventHandler((event) => {\u003C\u002Fspan>',\n      '\u003Cspan class=\"console-line dim\">  const id = getRouterParam(event, \\'id\\') \u002F\u002F never throws NUXT_E8012, either source\u003C\u002Fspan>'\n    ];\n    if (callsSession) {\n      lines.push('\u003Cspan class=\"console-line dim\">  const session = useSession(event, { password: \\'...\\' })\u003C\u002Fspan>');\n    }\n    lines.push('\u003Cspan class=\"console-line dim\">  return { id' + (callsSession ? ', userId: session.data.userId' : '') + ' }\u003C\u002Fspan>', '\u003Cspan class=\"console-line dim\">})\u003C\u002Fspan>');\n    if (callsSession && handlerSrc !== 'nuxtserver') {\n      lines.push('\u003Cspan class=\"console-line err\">✘ 500 — NUXT_E8012: `useSession` from `nuxt\u002Fserver` was called with an h3 event. The handler was defined with h3\\'s `defineEventHandler` (auto-imported), which passes a different event.\u003C\u002Fspan>');\n    } else if (callsSession) {\n      lines.push('\u003Cspan class=\"console-line ok\">✔ 200 — useSession reads the portable event fine, because this handler\\'s defineEventHandler is nuxt\u002Fserver\\'s own.\u003C\u002Fspan>');\n    } else {\n      lines.push('\u003Cspan class=\"console-line ok\">✔ 200 — no session helper is called, so the defineEventHandler source doesn\\'t matter here.\u003C\u002Fspan>');\n    }\n    log.innerHTML = lines.join('');\n  });\n\n  \u002F\u002F ---------- sendRedirect contract (documented difference, modeled) ----------\n  \u002F\u002F Verified against the installed nuxt@4.6.2 package's dist\u002Fserver\u002Findex.js:\n  \u002F\u002F nuxt\u002Fserver's sendRedirect calls setResponseStatus(event, status) and\n  \u002F\u002F event.res.headers.set('location', location) *before* it returns the\n  \u002F\u002F \u003Cmeta refresh> fallback body — so the status and header are already set\n  \u002F\u002F as a side effect, same as the auto-imported version. Skipping the\n  \u002F\u002F `return` loses only the fallback body, not the redirect.\n  var redirectLog = document.getElementById('redirectLog');\n  function showRedirect(source) {\n    if (source === 'auto') {\n      redirectLog.innerHTML =\n        '\u003Cspan class=\"console-line dim\">export default defineEventHandler((event) => {\u003C\u002Fspan>' +\n        '\u003Cspan class=\"console-line dim\">  sendRedirect(event, \\'\u002Flogin\\') \u002F\u002F h3 auto-import, no return\u003C\u002Fspan>' +\n        '\u003Cspan class=\"console-line dim\">})\u003C\u002Fspan>' +\n        '\u003Cspan class=\"console-line ok\">✔ 302 Found → Location: \u002Flogin (status + header set and the response ended immediately, as a side effect — the missing return changes nothing here)\u003C\u002Fspan>';\n    } else {\n      redirectLog.innerHTML =\n        '\u003Cspan class=\"console-line dim\">import { defineEventHandler, sendRedirect } from \\'nuxt\u002Fserver\\'\u003C\u002Fspan>' +\n        '\u003Cspan class=\"console-line dim\">export default defineEventHandler((event) => {\u003C\u002Fspan>' +\n        '\u003Cspan class=\"console-line dim\">  sendRedirect(event, \\'\u002Flogin\\') \u002F\u002F nuxt\u002Fserver, no return\u003C\u002Fspan>' +\n        '\u003Cspan class=\"console-line dim\">})\u003C\u002Fspan>' +\n        '\u003Cspan class=\"console-line ok\">✔ 302 Found → Location: \u002Flogin (status + header were already set before sendRedirect returned anything — the redirect works) — but the body is empty, because the <meta refresh> fallback page it returned was never sent back\u003C\u002Fspan>';\n    }\n  }\n  document.getElementById('redirectAuto').addEventListener('click', function () {\n    this.setAttribute('aria-pressed', 'true');\n    document.getElementById('redirectNuxtServer').setAttribute('aria-pressed', 'false');\n    showRedirect('auto');\n  });\n  document.getElementById('redirectNuxtServer').addEventListener('click', function () {\n    this.setAttribute('aria-pressed', 'true');\n    document.getElementById('redirectAuto').setAttribute('aria-pressed', 'false');\n    showRedirect('nuxtserver');\n  });\n  showRedirect('auto');\n\n  \u002F\u002F ---------- portability across server builders (release-notes claim, modeled) ----------\n  var BUILDER_LABEL = {\n    nitro2: 'Nitro v2',\n    vite: '@nuxt\u002Fvite-server',\n    nitro3: 'Nitro v3 + h3 v2'\n  };\n  function renderBuilder(builder) {\n    var grid = document.getElementById('builderGrid');\n    grid.innerHTML = '';\n    var rows = [\n      { label: 'Handler written against h3 auto-imports', portable: builder === 'nitro2' },\n      { label: 'Handler written against nuxt\u002Fserver (explicit)', portable: true }\n    ];\n    rows.forEach(function (r) {\n      var row = document.createElement('div');\n      row.className = 'builder-row';\n      var pill = '\u003Cspan class=\"pill ' + (r.portable ? 'good' : 'bad') + '\">' + (r.portable ? 'runs unchanged' : 'needs adapting') + '\u003C\u002Fspan>';\n      row.innerHTML = '\u003Cspan style=\"flex:1;\">' + r.label + ' on \u003Cb>' + BUILDER_LABEL[builder] + '\u003C\u002Fb>\u003C\u002Fspan>' + pill;\n      grid.appendChild(row);\n    });\n  }\n  document.getElementById('builderSelect').addEventListener('change', function () {\n    renderBuilder(this.value);\n  });\n  renderBuilder('nitro2');\n})();",{"height":52,"autorun":17},520,{"slug":45,"title":54,"excerpt":55,"coverUrl":56,"vertical":57},"Nuxt 4.6 nuxt\u002Fserver: Why Mixing h3 Imports Throws NUXT_E8012","Nuxt 4.6 added a new nuxt\u002Fserver import source alongside h3 — mix the two in one handler and you hit NUXT_E8012. The real boundary, plus a cheat sheet.","\u002Fmedia\u002Fcovers\u002Fnuxt-weekly-nuxt-server-import-boundary.png",{"slug":6},[59,63,67,71,75,79,83,87,91,95,99,102],{"slug":60,"name":61,"articles":62},"webdev","Webdev",152,{"slug":64,"name":65,"articles":66},"javascript","Javascript",126,{"slug":68,"name":69,"articles":70},"frontend","Frontend",88,{"slug":72,"name":73,"articles":74},"tutorial","Tutorial",59,{"slug":76,"name":77,"articles":78},"css","Css",45,{"slug":80,"name":81,"articles":82},"performance","Performance",25,{"slug":84,"name":85,"articles":86},"typescript","Typescript",22,{"slug":88,"name":89,"articles":90},"react","React",19,{"slug":92,"name":93,"articles":94},"browser","Browser",14,{"slug":96,"name":97,"articles":98},"programming","Programming",13,{"slug":100,"name":101,"articles":98},"node","Node",{"slug":103,"name":104,"articles":105},"accessibility","Accessibility",10]