[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"verticals":3,"playground-nestjs-weekly-lifecycle-hook-order":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},"nestjs-weekly-lifecycle-hook-order","NestJS lifecycle hook order — interactive playground",null,"\u003Cdiv class=\"pg\">\n    \u003Ch1 class=\"pg-title\">🎮 Walk NestJS's bootstrap hook order\u003C\u002Fh1>\n    \u003Cp class=\"pg-sub\">\n      This is a \u003Cb>model\u003C\u002Fb> of Nest's container bootstrap, not a running NestJS app — nothing here starts\n      a real server. Toggle whether \u003Ccode>ReportsService\u003C\u002Fcode> actually injects \u003Ccode>MetricsService\u003C\u002Fcode>,\n      then boot the graph and watch which order is \u003Cem>guaranteed\u003C\u002Fem> versus which one Nest has never promised.\n    \u003C\u002Fp>\n\n    \u003Cdiv class=\"banner info\">\n      Simulated model — walks the documented dependency-injection guarantee in plain JS. No real NestJS app runs here.\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">1\u003C\u002Fspan> Controls\u003C\u002Fdiv>\n      \u003Cdiv class=\"btn-row\" style=\"flex-wrap:wrap; gap:14px;\">\n        \u003Cdiv class=\"field\">\n          \u003Cspan class=\"ctl-label\">Does ReportsService inject MetricsService?\u003C\u002Fspan>\n          \u003Cdiv class=\"seg\" id=\"edgeSeg\">\n            \u003Cbutton type=\"button\" aria-pressed=\"false\" data-val=\"no\">No — reads a shared variable\u003C\u002Fbutton>\n            \u003Cbutton type=\"button\" aria-pressed=\"true\" data-val=\"yes\">Yes — constructor-injected\u003C\u002Fbutton>\n          \u003C\u002Fdiv>\n        \u003C\u002Fdiv>\n        \u003Cdiv class=\"field\">\n          \u003Cspan class=\"ctl-label\">Simulate\u003C\u002Fspan>\n          \u003Cdiv class=\"seg\" id=\"verSeg\">\n            \u003Cbutton type=\"button\" aria-pressed=\"true\" data-val=\"v11\">Pre-v12 order\u003C\u002Fbutton>\n            \u003Cbutton type=\"button\" aria-pressed=\"false\" data-val=\"v12\">NestJS 12 order\u003C\u002Fbutton>\n          \u003C\u002Fdiv>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"btn-row\" style=\"margin-top:12px\">\n        \u003Cbutton class=\"btn primary\" id=\"run\">▶️ Boot the app\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn ghost\" id=\"reset\">Reset\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"presets\" style=\"margin-top:12px\">\n        \u003Cbutton class=\"btn sm\" data-preset=\"buggy-v11\">Preset: the bug, before the upgrade\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn sm\" data-preset=\"buggy-v12\">Preset: same bug, after upgrading to v12\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn sm\" data-preset=\"fixed\">Preset: fixed with real DI\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> Bootstrap graph\u003C\u002Fdiv>\n      \u003Cdiv class=\"graph\" id=\"graph\">\n        \u003Cdiv class=\"node\" data-node=\"cache\">\u003Cspan class=\"name\">🗄️ CacheService\u003C\u002Fspan>\u003Cspan class=\"hint-sm\">no dependencies of its own\u003C\u002Fspan>\u003C\u002Fdiv>\n        \u003Cdiv class=\"node\" data-node=\"metrics\">\u003Cspan class=\"name\">📈 MetricsService\u003C\u002Fspan>\u003Cspan class=\"hint-sm\">no dependencies of its own\u003C\u002Fspan>\u003C\u002Fdiv>\n        \u003Cdiv class=\"edge-label\" id=\"edgeLabel\">CacheService → OrdersService: a real constructor-injection edge (always guaranteed)\u003C\u002Fdiv>\n        \u003Cdiv class=\"node\" data-node=\"orders\">\u003Cspan class=\"name\">🧾 OrdersService\u003C\u002Fspan>\u003Cspan class=\"hint-sm\">injects CacheService\u003C\u002Fspan>\u003C\u002Fdiv>\n        \u003Cdiv class=\"node\" data-node=\"reports\">\u003Cspan class=\"name\">📊 ReportsService\u003C\u002Fspan>\u003Cspan class=\"hint-sm\" id=\"reportsHint\">reads a shared variable, not an injected dependency\u003C\u002Fspan>\u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n\n      \u003Cdiv class=\"status\" id=\"statusLine\">\n        \u003Cspan class=\"dot info\" id=\"dot\">\u003C\u002Fspan>\u003Cspan id=\"statusText\">Ready — set the controls above and boot the app.\u003C\u002Fspan>\n      \u003C\u002Fdiv>\n      \u003Cp class=\"hint\" id=\"caption\">Nothing has booted yet. Each box lights up as its onModuleInit runs.\u003C\u002Fp>\n\n      \u003Cdiv class=\"panel-label\" style=\"margin-top:14px\">\u003Cspan class=\"n\">3\u003C\u002Fspan> Resulting onModuleInit order\u003C\u002Fdiv>\n      \u003Cdiv class=\"order-row\" id=\"orderRow\">\u003C\u002Fdiv>\n\n      \u003Cdiv class=\"panel-label\" style=\"margin-top:10px\">\u003Cspan class=\"n\">4\u003C\u002Fspan> Play-by-play\u003C\u002Fdiv>\n      \u003Cdiv class=\"log\" id=\"log\">\u003C\u002Fdiv>\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\u002F* Demo-specific only — base.css owns tokens, panels, buttons, status, log. *\u002F\n  .graph {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    gap: 10px;\n    margin: 6px 0 4px;\n  }\n  @media (max-width: 640px) {\n    .graph { grid-template-columns: 1fr; }\n  }\n  .node {\n    padding: 10px 10px;\n    border-radius: var(--radius-sm);\n    border: 1px solid var(--line);\n    background: var(--panel-2);\n    font-size: 0.78rem;\n    line-height: 1.35;\n    transition: background .25s, border-color .25s, transform .2s;\n  }\n  .node .name { font-weight: 600; display: block; margin-bottom: 2px; }\n  .node .hint-sm { color: var(--muted); font-size: 0.7rem; }\n  .node.active { border-color: var(--accent); background: color-mix(in oklab, var(--accent) 18%, var(--panel-2)); transform: translateY(-2px); }\n  .node.done { border-color: color-mix(in oklab, #34d399 55%, var(--line)); background: color-mix(in oklab, #34d399 14%, var(--panel-2)); }\n  .edge-label { grid-column: 1 \u002F -1; text-align: center; font-size: 0.72rem; color: var(--muted); margin: -2px 0 2px; }\n  .order-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 2px; }\n  .order-chip {\n    padding: 4px 10px;\n    border-radius: 999px;\n    border: 1px solid var(--line);\n    background: var(--panel-2);\n    font-size: 0.72rem;\n  }\n  .order-chip.guaranteed { border-color: color-mix(in oklab, #34d399 55%, var(--line)); }\n  .order-chip.unguaranteed { border-color: color-mix(in oklab, #f59e0b 55%, var(--line)); }","\"use strict\";\n  const $ = (id) => document.getElementById(id);\n  let injected = false; \u002F\u002F does ReportsService constructor-inject MetricsService?\n  let simVersion = \"v11\"; \u002F\u002F \"v11\" (import-order-ish) or \"v12\" (hierarchy-level — reshuffled)\n  let running = false;\n\n  function seg(id, onChange) {\n    const el = $(id);\n    el.querySelectorAll(\"button\").forEach((btn) => {\n      btn.addEventListener(\"click\", () => {\n        el.querySelectorAll(\"button\").forEach((b) => b.setAttribute(\"aria-pressed\", String(b === btn)));\n        onChange(btn.dataset.val);\n      });\n    });\n  }\n  seg(\"edgeSeg\", (v) => { injected = v === \"yes\"; updateHints(); });\n  seg(\"verSeg\", (v) => (simVersion = v));\n\n  function setSeg(id, val) {\n    $(id).querySelectorAll(\"button\").forEach((b) => b.setAttribute(\"aria-pressed\", String(b.dataset.val === val)));\n  }\n\n  function updateHints() {\n    $(\"reportsHint\").textContent = injected\n      ? \"injects MetricsService — a real edge\"\n      : \"reads a shared variable, not an injected dependency\";\n    $(\"edgeLabel\").textContent = injected\n      ? \"MetricsService → ReportsService: now a real constructor-injection edge (always guaranteed)\"\n      : \"CacheService → OrdersService: a real constructor-injection edge (always guaranteed)\";\n  }\n\n  function clearGraph() {\n    [\"cache\", \"metrics\", \"orders\", \"reports\"].forEach((n) => {\n      document.querySelector(`[data-node=\"${n}\"]`).className = \"node\";\n    });\n    $(\"orderRow\").innerHTML = \"\";\n  }\n\n  function setStatus(text, kind) {\n    $(\"statusText\").textContent = text;\n    $(\"dot\").className = \"dot \" + kind;\n  }\n\n  function log(line) {\n    const el = $(\"log\");\n    el.textContent += (el.textContent ? \"\\n\" : \"\") + line;\n    el.scrollTop = el.scrollHeight;\n  }\n\n  function sleep(ms) { return new Promise((r) => setTimeout(r, ms)); }\n\n  function chip(label, kind) {\n    const el = $(\"orderRow\");\n    const d = document.createElement(\"div\");\n    d.className = \"order-chip \" + kind;\n    d.textContent = label;\n    el.appendChild(d);\n  }\n\n  async function mark(node, cls, caption) {\n    const el = document.querySelector(`[data-node=\"${node}\"]`);\n    el.className = \"node \" + cls;\n    $(\"caption\").textContent = caption;\n    await sleep(480);\n  }\n\n  async function run() {\n    if (running) return;\n    running = true;\n    clearGraph();\n    $(\"log\").textContent = \"\";\n    $(\"run\").disabled = true;\n    setStatus(\"Booting…\", \"info\");\n\n    \u002F\u002F CacheService and OrdersService: a REAL edge. Always guaranteed, in every version.\n    await mark(\"cache\", \"active\", \"CacheService has no dependencies of its own — it initializes first.\");\n    document.querySelector('[data-node=\"cache\"]').className = \"node done\";\n    log(\"1. CacheService.onModuleInit() — guaranteed first, nothing depends on anything here.\");\n    chip(\"1. CacheService\", \"guaranteed\");\n\n    await mark(\"orders\", \"active\", \"OrdersService constructor-injects CacheService, so Nest must finish Cache first.\");\n    document.querySelector('[data-node=\"orders\"]').className = \"node done\";\n    log(\"2. OrdersService.onModuleInit() — runs after CacheService, because the constructor depends on it.\");\n    chip(\"2. OrdersService\", \"guaranteed\");\n\n    if (injected) {\n      \u002F\u002F ReportsService now injects MetricsService — a real edge. Same guarantee applies.\n      await mark(\"metrics\", \"active\", \"MetricsService has no dependencies of its own.\");\n      document.querySelector('[data-node=\"metrics\"]').className = \"node done\";\n      log(\"3. MetricsService.onModuleInit() — guaranteed before ReportsService, because it's now injected.\");\n      chip(\"3. MetricsService\", \"guaranteed\");\n\n      await mark(\"reports\", \"active\", \"ReportsService injects MetricsService, so this order is now part of the dependency graph.\");\n      document.querySelector('[data-node=\"reports\"]').className = \"node done\";\n      log(\"4. ReportsService.onModuleInit() — reads metrics.getSeed() on an instance guaranteed to exist already.\");\n      chip(\"4. ReportsService\", \"guaranteed\");\n\n      setStatus(\"Booted — every order shown is guaranteed, in every NestJS version.\", \"good\");\n      $(\"caption\").textContent = \"With a real injected dependency, there's nothing left for a version upgrade to reshuffle.\";\n    } else {\n      \u002F\u002F No edge between MetricsService and ReportsService. Nest has never promised an order here.\n      \u002F\u002F We model the two orders the release notes describe changing between.\n      const metricsFirst = simVersion === \"v11\"; \u002F\u002F pre-v12: import-declaration-ish order happened to run Metrics first\n      const first = metricsFirst ? \"metrics\" : \"reports\";\n      const second = metricsFirst ? \"reports\" : \"metrics\";\n      const firstLabel = metricsFirst ? \"MetricsService\" : \"ReportsService\";\n      const secondLabel = metricsFirst ? \"ReportsService\" : \"MetricsService\";\n\n      await mark(first, \"active\", `No dependency edge connects these two — Nest picks an order, but never promised which.`);\n      document.querySelector(`[data-node=\"${first}\"]`).className = \"node done\";\n      log(`3. ${firstLabel}.onModuleInit() — runs first in this ${simVersion === \"v11\" ? \"pre-v12\" : \"NestJS 12\"} simulation. No edge forces this.`);\n      chip(`3. ${firstLabel}`, \"unguaranteed\");\n\n      await mark(second, \"active\", metricsFirst\n        ? \"ReportsService reads the shared variable now — but nothing in the contract says this has to come second.\"\n        : \"MetricsService runs second here — ReportsService already read the (still-zero) shared variable above it.\");\n      document.querySelector(`[data-node=\"${second}\"]`).className = \"node done\";\n      log(`4. ${secondLabel}.onModuleInit() — runs second. ${metricsFirst ? \"\" : \"ReportsService already ran — it read 0.\"}`);\n      chip(`4. ${secondLabel}`, \"unguaranteed\");\n\n      if (metricsFirst) {\n        setStatus(\"Booted — happened to work, because of an order Nest never promised.\", \"warn\");\n      } else {\n        setStatus(\"Booted — ReportsService read the seed before MetricsService set it. Same code, different order.\", \"bad\");\n      }\n      $(\"caption\").textContent = \"Flip \\\"Simulate\\\" above and boot again: the unguaranteed pair can reorder. The guaranteed pair (Cache → Orders) never does.\";\n    }\n\n    running = false;\n    $(\"run\").disabled = false;\n  }\n\n  $(\"run\").addEventListener(\"click\", run);\n  $(\"reset\").addEventListener(\"click\", () => {\n    clearGraph();\n    $(\"log\").textContent = \"\";\n    setStatus(\"Ready — set the controls above and boot the app.\", \"info\");\n    $(\"caption\").textContent = \"Nothing has booted yet. Each box lights up as its onModuleInit runs.\";\n  });\n\n  document.querySelectorAll(\"[data-preset]\").forEach((btn) => {\n    btn.addEventListener(\"click\", () => {\n      const p = btn.dataset.preset;\n      if (p === \"buggy-v11\") { injected = false; simVersion = \"v11\"; }\n      if (p === \"buggy-v12\") { injected = false; simVersion = \"v12\"; }\n      if (p === \"fixed\") { injected = true; simVersion = \"v12\"; }\n      setSeg(\"edgeSeg\", injected ? \"yes\" : \"no\");\n      setSeg(\"verSeg\", simVersion);\n      updateHints();\n      run();\n    });\n  });\n\n  updateHints();",{"height":52,"autorun":17},520,{"slug":45,"title":54,"excerpt":55,"coverUrl":56,"vertical":57},"NestJS 12 Lifecycle Hooks: The Order You Can't Assume","NestJS 12 changed how lifecycle hooks are ordered. Learn what onModuleInit and onApplicationBootstrap really guarantee, plus a copy-paste cheat sheet.","\u002Fmedia\u002Fcovers\u002Fnestjs-weekly-lifecycle-hook-order.png",{"slug":6},[59,63,67,71,75,79,83,87,91,95,99,103],{"slug":60,"name":61,"articles":62},"webdev","Webdev",151,{"slug":64,"name":65,"articles":66},"javascript","Javascript",124,{"slug":68,"name":69,"articles":70},"frontend","Frontend",88,{"slug":72,"name":73,"articles":74},"tutorial","Tutorial",58,{"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",21,{"slug":88,"name":89,"articles":90},"react","React",19,{"slug":92,"name":93,"articles":94},"browser","Browser",14,{"slug":96,"name":97,"articles":98},"node","Node",13,{"slug":100,"name":101,"articles":102},"programming","Programming",12,{"slug":104,"name":105,"articles":106},"accessibility","Accessibility",10]