{"id":513,"date":"2026-05-17T07:04:25","date_gmt":"2026-05-16T23:04:25","guid":{"rendered":"https:\/\/junai.ai\/blog\/ts-strict-deep-18\/"},"modified":"2026-05-17T07:04:25","modified_gmt":"2026-05-16T23:04:25","slug":"ts-strict-deep-18","status":"publish","type":"post","link":"https:\/\/junai.ai\/blog\/ts-strict-deep-18\/","title":{"rendered":"strict \ubaa8\ub4dc \uae4a\uac8c \u2014 7\uac00\uc9c0 \uc635\uc158 + \ubcf4\ub108\uc2a4 (\uace0\uae09 18\ud3b8)"},"content":{"rendered":"\n<!-- WordPress REST API \ubc1c\ud589\uc6a9 HTML (\uc790\ub3d9 \uc0dd\uc131) -->\n<!-- WP-FEATURED-MEDIA-ID: 309 -->\n<div style=\"max-width:800px;margin:0 auto;\">\n<style>\n:root{--color-primary:#3178c6;--color-accent:#60a5fa;--color-bg:#fafafa;--color-bg-card:#ffffff;--color-text:#1e293b;--color-text-muted:#64748b;--hero-start:#0f172a;--hero-end:#3178c6;--font-body:-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo','Noto Sans KR',sans-serif;--size-body:17px;--line-height:1.75;}\n*{box-sizing:border-box;}\n.container{max-width:760px;margin:0 auto;padding:0 22px 80px;}\n.hero{background:linear-gradient(135deg,var(--hero-start) 0%,var(--hero-end) 100%);color:#fff;padding:72px 22px 56px;text-align:center;}\n.hero .badge{display:inline-block;background:rgba(96,165,250,0.18);color:var(--color-accent);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:0.5px;margin-bottom:18px;}\n.hero h1{margin:0 0 18px;font-size:36px;line-height:1.3;letter-spacing:-0.3px;}\n.hero p.sub{margin:0 auto;max-width:580px;font-size:17px;color:#dbeafe;}\n.hero img{width:100%;max-width:720px;height:auto;margin:36px auto 0;display:block;border-radius:10px;box-shadow:0 8px 32px rgba(0,0,0,0.3);}\n.meta{display:flex;gap:14px;justify-content:center;margin-top:20px;font-size:13px;color:#93c5fd;flex-wrap:wrap;}\n.meta span::before{content:\"\u00b7\";margin-right:14px;color:#1e3a8a;}\n.meta span:first-child::before{content:\"\";margin:0;}\narticle{background:var(--color-bg-card);margin-top:-36px;padding:44px 28px;border-radius:14px;box-shadow:0 2px 18px rgba(0,0,0,0.06);}\narticle p{margin:0 0 18px;}\nh2{font-size:28px;line-height:1.35;letter-spacing:-0.3px;margin:48px 0 18px;padding-bottom:10px;border-bottom:2px solid var(--color-primary);}\nh2:first-of-type{margin-top:8px;}\nh3{font-size:21px;line-height:1.4;margin:30px 0 12px;color:var(--color-primary);}\ncode{background:#f1f5f9;color:#0f172a;padding:2px 6px;border-radius:4px;font-family:'SFMono-Regular',Menlo,Consolas,monospace;font-size:0.92em;}\npre{background:#0f172a;color:#e2e8f0;padding:18px 20px;border-radius:10px;overflow-x:auto;font-size:14.5px;line-height:1.65;margin:18px 0;}\npre code{background:transparent;color:inherit;padding:0;}\nul,ol{margin:0 0 18px;padding-left:24px;}\nli{margin-bottom:8px;}\nstrong{color:#0f172a;}\n.databox{background:#eff6ff;border-left:4px solid var(--color-primary);padding:18px 20px;border-radius:6px;margin:22px 0;}\n.databox p{margin:0 0 8px;}\n.databox p:last-child{margin:0;}\n.databox strong{color:var(--color-primary);}\n.warnbox{background:linear-gradient(135deg,#fef3c7 0%,#fde68a 100%);border-left:4px solid #d97706;padding:18px 20px;border-radius:6px;margin:22px 0;}\n.warnbox strong{color:#92400e;}\n.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:22px 0;}\ntable{width:100%;border-collapse:collapse;font-size:15px;background:var(--color-bg-card);}\nth,td{padding:11px 12px;text-align:left;border-bottom:1px solid #e2e8f0;vertical-align:top;}\nth{background:#f1f5f9;font-weight:700;color:#0f172a;}\ntd:first-child,th:first-child{font-weight:700;}\n.cta{background:linear-gradient(135deg,#3178c6 0%,#60a5fa 100%);color:#fff;padding:30px 24px;border-radius:12px;margin-top:44px;text-align:center;}\n.cta h3{color:#fff;margin:0 0 10px;}\n.cta p{margin:0;color:#dbeafe;}\n.series-nav{background:#eff6ff;padding:18px 22px;border-radius:10px;margin-top:24px;font-size:14.5px;color:var(--color-text-muted);}\n.series-nav strong{color:var(--color-primary);}\n@media (max-width:480px){.hero{padding:52px 18px 44px;}.hero h1{font-size:26px;}.hero p.sub{font-size:15px;}article{padding:28px 18px;border-radius:10px;}h2{font-size:22px;}h3{font-size:18px;}body{font-size:16px;}pre{font-size:13px;padding:14px 16px;}}\n@media (max-width:560px){.tablewrap table,.tablewrap thead,.tablewrap tbody,.tablewrap tr,.tablewrap th,.tablewrap td{display:block;width:auto;}.tablewrap thead{display:none;}.tablewrap tr{margin:0 0 14px;border:1px solid #e2e8f0;border-radius:10px;overflow:hidden;}.tablewrap td{border:none;border-bottom:1px solid #f1f5f9;padding:9px 14px;}.tablewrap td:first-child{background:#eff6ff;font-weight:800;font-size:15.5px;}.tablewrap td:last-child{border-bottom:none;}.tablewrap td[data-label]::before{content:attr(data-label) \" \u2014 \";font-weight:700;color:var(--color-primary);}}\n<\/style>\n<header class=\"hero\">\n  <span class=\"badge\">\ud0c0\uc785\uc2a4\ud06c\ub9bd\ud2b8 \uad50\uc7ac \u00b7 18\ud3b8 \/ 20\ud3b8<\/span>\n  <h1>strict \ubaa8\ub4dc \uae4a\uac8c \u2014 7\uac00\uc9c0 \uc635\uc158 + \ubcf4\ub108\uc2a4<\/h1>\n  <p class=\"sub\">strict \uac00\uc871\uc774 \ucf1c\ub294 \uac80\uc0ac\ub4e4\uacfc \ucd94\uac00\ub85c \ucf24 \uac12\uc9c4 \uc635\uc158 3\uac1c.<\/p>\n  <div class=\"meta\"><span>\uace0\uae09<\/span><span>\uc77d\ub294 \uc2dc\uac04 7\ubd84<\/span><span>2026-05-17<\/span><\/div>\n  <img decoding=\"async\" src=\"https:\/\/junai.ai\/blog\/wp-content\/uploads\/2026\/05\/hero-86.jpg\" alt=\"strict \uc635\uc158\uc774 \ub2e4\uc591\ud55c \ud0c0\uc785 \uc548\uc804 \uac80\uc0ac\ub97c \ucf1c\ub294 \ud1a0\uae00 \ub3c4\uc2dd\">\n<\/header>\n\n<div class=\"container\">\n<article>\n\n<p><code>strict: true<\/code> \ud55c \uc904\uc774 7\uac00\uc9c0 \uac80\uc0ac\ub97c \ub3d9\uc2dc\uc5d0 \ucf2d\ub2c8\ub2e4. \uac01\uac01\uc774 \uc5b4\ub5a4 \ubc84\uadf8\ub97c \uc7a1\ub294\uc9c0 \uc54c\uba74 \uc5b4\ub5a4 strict \uc635\uc158\uc744 \ucf24\uc9c0\u00b7\ub04c\uc9c0 \ud310\ub2e8\ud558\uae30 \uc27d\uc2b5\ub2c8\ub2e4. 18\ud3b8\uc740 strict 7\uac00\uc871\uc744 \ud558\ub098\uc529 \ud480\uace0, \uadf8 \uc704\uc5d0 \ucd94\uac00\ub85c \ucf1c\uba74 \uc88b\uc740 \uc635\uc158 3\uac1c\uae4c\uc9c0.<\/p>\n\n<h2>strict \u2014 7\uac00\uc9c0 \uc635\uc158\uc744 \ud55c \ubc88\uc5d0<\/h2>\n\n<pre><code>{\n  \"compilerOptions\": {\n    \"strict\": true\n    \/\/ = strictNullChecks\n    \/\/ + noImplicitAny\n    \/\/ + strictFunctionTypes\n    \/\/ + strictBindCallApply\n    \/\/ + strictPropertyInitialization\n    \/\/ + noImplicitThis\n    \/\/ + useUnknownInCatchVariables\n    \/\/ + alwaysStrict\n  }\n}<\/code><\/pre>\n\n<h2>\u2460 strictNullChecks \u2014 \uac00\uc7a5 \uc911\uc694<\/h2>\n\n<pre><code>\/\/ \ub044\uba74 \u2014 null\/undefined \uac00 \uc5b4\ub514\ub4e0 \ub4e4\uc5b4\uac10 (\uc704\ud5d8)\nfunction len(s: string) { return s.length; }\nlen(null);   \/\/ \ucef4\ud30c\uc77c \ud1b5\uacfc \u2192 \ub7f0\ud0c0\uc784 \uc5d0\ub7ec\n\n\/\/ \ucf1c\uba74 \u2014 null\/undefined \ub294 \uba85\uc2dc\uc801\uc73c\ub85c\nfunction len(s: string | null) {\n  if (s === null) return 0;\n  return s.length;\n}<\/code><\/pre>\n\n<p><strong>strict \uac00\uc871 \uc911 \uac00\uc7a5 \ud070 \uac00\uce58<\/strong>. &#8220;\uc774 \ubcc0\uc218\uac00 null \uc77c \uc218 \uc788\ub098&#8221; \uac00 \ud0c0\uc785\uc5d0 \ubcf4\uc785\ub2c8\ub2e4.<\/p>\n\n<h2>\u2461 noImplicitAny \u2014 \ud0c0\uc785 \uc801\uac8c \ube60\ub728\ub9ac\uae30<\/h2>\n\n<pre><code>\/\/ \ub044\uba74\nfunction add(a, b) { return a + b; }    \/\/ a, b \ub294 any\nadd(\"1\", 2);   \/\/ \ud1b5\uacfc\n\n\/\/ \ucf1c\uba74 \u2014 \ub9e4\uac1c\ubcc0\uc218\uc5d0 \ud0c0\uc785 \uac15\uc81c\nfunction add(a: number, b: number) { ... }   \/\/ \uc548 \uc801\uc73c\uba74 \uc5d0\ub7ec<\/code><\/pre>\n\n<h2>\u2462 strictFunctionTypes \u2014 \ud568\uc218 \ub9e4\uac1c\ubcc0\uc218 \ubcc0\uc131<\/h2>\n\n<pre><code>\/\/ Animal \ubc1b\ub294 \ud568\uc218\uc5d0 Dog \ubc1b\ub294 \ud568\uc218 \ud560\ub2f9?\n\/\/ \ub044\uba74 \ud1b5\uacfc, \ucf1c\uba74 \ub9c9\ud798 (\uc548\uc804)\n\ntype AnimalHandler = (a: Animal) =&gt; void;\ntype DogHandler    = (d: Dog) =&gt; void;\n\nlet h: AnimalHandler = (d: Dog) =&gt; { ... };\n\/\/ \ub044\uba74 OK \u2014 \ud558\uc9c0\ub9cc h(cat) \ud588\uc744 \ub54c d.bark() \ud638\ucd9c\ud558\uba74 \ub7f0\ud0c0\uc784 \uc5d0\ub7ec\n\/\/ \ucf1c\uba74 \uc5d0\ub7ec\ub85c \ucc28\ub2e8<\/code><\/pre>\n\n<h2>\u2463 strictPropertyInitialization \u2014 \ud074\ub798\uc2a4 \ud544\ub4dc \ucd08\uae30\ud654<\/h2>\n\n<pre><code>\/\/ \ub044\uba74\nclass User {\n  name: string;     \/\/ \ucd08\uae30\uac12 \uc5c6\uc74c \u2192 \uc0ac\uc6a9 \uc2dc undefined\n}\n\n\/\/ \ucf1c\uba74\nclass User {\n  name: string;     \/\/ \u274c 'name' has no initializer\n\n  \/\/ \ud574\uacb0 1: \ucd08\uae30\uac12\n  name: string = \"\";\n\n  \/\/ \ud574\uacb0 2: \uc0dd\uc131\uc790\uc5d0\uc11c\n  constructor(name: string) { this.name = name; }\n\n  \/\/ \ud574\uacb0 3: ! (\ud655\uc2e4\ud788 \ub098\uc911\uc5d0 \ud560\ub2f9\ud568\uc744 \uc57d\uc18d)\n  name!: string;\n}<\/code><\/pre>\n\n<h2>\u2464 noImplicitThis \u2014 this \uc758 \ud0c0\uc785<\/h2>\n\n<pre><code>\/\/ \ub044\uba74 this \uac00 any\nfunction fn() {\n  console.log(this.x);    \/\/ any\n}\n\n\/\/ \ucf1c\uba74 \u2014 \uc77c\ubc18 \ud568\uc218\uc758 this \ub294 \uc0ac\uc6a9 \uc804 \uba85\uc2dc \ud544\uc694\nfunction fn(this: { x: number }) {\n  console.log(this.x);    \/\/ OK\n}<\/code><\/pre>\n\n<h2>\u2465 useUnknownInCatchVariables \u2014 catch \uc758 \uc548\uc804<\/h2>\n\n<pre><code>try { ... } catch (err) {\n  \/\/ \ub044\uba74 err: any (\uc704\ud5d8)\n  \/\/ \ucf1c\uba74 err: unknown \u2014 \uac80\uc0ac \ud6c4 \uc0ac\uc6a9\n  if (err instanceof Error) console.error(err.message);\n}<\/code><\/pre>\n\n<h2>\u2466 strictBindCallApply \u2014 bind\/call\/apply \uc758 \ud0c0\uc785 \uac80\uc0ac<\/h2>\n\n<pre><code>function greet(name: string) { return `Hi, ${name}`; }\ngreet.call(null, 42);   \/\/ \ub044\uba74 \ud1b5\uacfc, \ucf1c\uba74 \uc5d0\ub7ec (number !== string)<\/code><\/pre>\n\n<h2>\ubcf4\ub108\uc2a4 1 \u2014 noUncheckedIndexedAccess<\/h2>\n\n<pre><code>\"noUncheckedIndexedAccess\": true\n\nconst arr = [1, 2, 3];\nconst x = arr[10];    \/\/ \ub044\uba74 x: number (\uac70\uc9d3\ub9d0), \ucf1c\uba74 x: number | undefined\n\nif (x !== undefined) {\n  x.toFixed(2);       \/\/ OK\n}\n\n\/\/ Record \uc778\ub371\uc2a4\ub3c4\nconst map: Record&lt;string, number&gt; = { a: 1 };\nconst v = map[\"b\"];   \/\/ \ucf1c\uba74 v: number | undefined<\/code><\/pre>\n\n<div class=\"databox\">\n  <p><strong>\uac00\uc7a5 \uc911\uc694\ud55c \ubcf4\ub108\uc2a4.<\/strong> strict \ub9cc\uc73c\ub85c\ub294 \ubc30\uc5f4\u00b7\uac1d\uccb4 \uc778\ub371\uc2a4 \uc811\uadfc\uc774 \ud56d\uc0c1 \uac12\uc774 \uc788\ub294 \uac83\ucc98\ub7fc \ub2e4\ub8f8. \uc774 \uc635\uc158\uc774 \uadf8 \uac70\uc9d3\ub9d0\uc744 \ub9c9\uc544\uc90d\ub2c8\ub2e4. \uc57d\uac04 \uc9dc\uc99d\ub098\uc9c0\ub9cc \uc9c4\uc9dc \ubc84\uadf8 \uc7a1\uc2b5\ub2c8\ub2e4.<\/p>\n<\/div>\n\n<h2>\ubcf4\ub108\uc2a4 2 \u2014 exactOptionalPropertyTypes<\/h2>\n\n<pre><code>\"exactOptionalPropertyTypes\": true\n\ninterface Config {\n  port?: number;\n}\n\n\/\/ \ub044\uba74\nconst c: Config = { port: undefined };   \/\/ OK\n\n\/\/ \ucf1c\uba74\nconst c: Config = { port: undefined };\n\/\/ \u274c Type 'undefined' is not assignable to type 'number'\n\/\/ \u2192 \uba85\uc2dc\uc801\uc73c\ub85c undefined \ubcf4\ub0b4\ub824\uba74 port?: number | undefined \ub85c \uc815\uc758\ud574\uc57c<\/code><\/pre>\n\n<p>&#8220;?&#8221;(\uc788\uc74c\/\uc5c6\uc74c) \uc640 &#8220;undefined&#8221;(\uac12\uc73c\ub85c undefined) \uc758 \uad6c\ubd84. JSON\u00b7API \uc751\ub2f5 \ub2e4\ub8f0 \ub54c \uc758\ubbf8 \uc788\ub294 \ucc28\uc774.<\/p>\n\n<h2>\ubcf4\ub108\uc2a4 3 \u2014 noImplicitOverride<\/h2>\n\n<pre><code>\"noImplicitOverride\": true\n\nclass Cat extends Animal {\n  speak() { ... }            \/\/ \u274c Must use 'override' modifier\n  override speak() { ... }   \/\/ \u2705\n}<\/code><\/pre>\n\n<p>\ubd80\ubaa8 \uba54\uc11c\ub4dc \uc624\ubc84\ub77c\uc774\ub4dc\ud560 \ub54c \uba85\uc2dc. \ubd80\ubaa8 \uba54\uc11c\ub4dc \uc774\ub984\uc774 \ubc14\ub00c\uba74 \uc790\uc2dd\uc5d0\uc11c \ucef4\ud30c\uc77c \uc5d0\ub7ec\ub85c \uc989\uc2dc \uc54c\ub9bc.<\/p>\n\n<h2>\uc2e4\uc804 \ub2e8\uacc4\ubcc4 \ub3c4\uc785<\/h2>\n\n<div class=\"tablewrap\">\n<table>\n  <thead>\n    <tr><th>\ub2e8\uacc4<\/th><th>\uc124\uc815<\/th><th>\ub300\uc0c1<\/th><\/tr>\n  <\/thead>\n  <tbody>\n    <tr><td data-label=\"\">0<\/td><td data-label=\"\">strict: false<\/td><td data-label=\"\">\uc61b JS \ucf54\ub4dc \ub9c8\uc774\uadf8\ub808\uc774\uc158 \uc2dc\uc791<\/td><\/tr>\n    <tr><td data-label=\"\">1<\/td><td data-label=\"\">noImplicitAny: true<\/td><td data-label=\"\">\ub9e4\uac1c\ubcc0\uc218 \ud0c0\uc785 \ucc44\uc6b0\uae30<\/td><\/tr>\n    <tr><td data-label=\"\">2<\/td><td data-label=\"\">strictNullChecks: true<\/td><td data-label=\"\">null \ucc98\ub9ac \uc815\ub9ac<\/td><\/tr>\n    <tr><td data-label=\"\">3<\/td><td data-label=\"\">strict: true<\/td><td data-label=\"\">\uc0c8 \ucf54\ub4dc\uc758 \ud45c\uc900<\/td><\/tr>\n    <tr><td data-label=\"\">4<\/td><td data-label=\"\">+ noUncheckedIndexedAccess<\/td><td data-label=\"\">\uc9c4\uc9dc \uc548\uc804 (\ubc30\uc5f4\/Record)<\/td><\/tr>\n    <tr><td data-label=\"\">5<\/td><td data-label=\"\">+ exactOptionalPropertyTypes<\/td><td data-label=\"\">\ubbf8\uc138 \uc548\uc804 (\uc120\ud0dd)<\/td><\/tr>\n    <tr><td data-label=\"\">6<\/td><td data-label=\"\">+ noImplicitOverride<\/td><td data-label=\"\">\uc0c1\uc18d \uc548\uc804<\/td><\/tr>\n  <\/tbody>\n<\/table>\n<\/div>\n\n<div class=\"warnbox\">\n  <p><strong>\uc810\uc9c4 \ub3c4\uc785 \uac00\uc774\ub4dc.<\/strong> \uae30\uc874 \ucf54\ub4dc \ubca0\uc774\uc2a4\uac00 \ud06c\uba74 \ud55c \ubc88\uc5d0 strict \ucf1c\uc9c0 \ub9d0\uace0 \uc704 \ub2e8\uacc4\ub300\ub85c. \uac01 \ub2e8\uacc4\ub9c8\ub2e4 \ubc1c\uc0dd\ud55c \uc5d0\ub7ec\ub97c \uc815\ub9ac\ud55c \ub2e4\uc74c \ub2e4\uc74c \uc635\uc158. strict-only \ub514\ub809\ud130\ub9ac\ubd80\ud130 \uc2dc\uc791\ud574 \ub2e8\uacc4\uc801\uc73c\ub85c \ud655\uc7a5\ub3c4 OK.<\/p>\n<\/div>\n\n<div class=\"cta\">\n  <h3>19\ud3b8 \u2014 \ube4c\ub4dc \uc131\ub2a5 (incremental\u00b7project references)<\/h3>\n  <p>\ubaa8\ub178\ub808\ud3ec\u00b7\ud070 \ud504\ub85c\uc81d\ud2b8\uc758 \ube4c\ub4dc \uc2dc\uac04 \uc904\uc774\uae30.<\/p>\n<\/div>\n\n<div class=\"series-nav\">\n  <strong>\ud83d\udcda \uc27d\uac8c \ubc30\uc6b0\ub294 \ud0c0\uc785\uc2a4\ud06c\ub9bd\ud2b8 \uad50\uc7ac<\/strong><br>\n  \uc774\uc804: 17\ud3b8 .d.ts \u00b7 \ud604\uc7ac: <strong>18\ud3b8 (\uace0\uae09)<\/strong> \u00b7 \ub2e4\uc74c \u2192 19\ud3b8 \ube4c\ub4dc \uc131\ub2a5 \u00b7 \uc9c4\ud589: <strong>18\/20<\/strong>\n<\/div>\n\n<\/article>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>strict 7\uac00\uc871 + noUncheckedIndexedAccess \ub4f1 \ucd94\uac00 \uc635\uc158. 20\ud3b8 \uad50\uc7ac 18\ud3b8.<\/p>\n","protected":false},"author":1,"featured_media":309,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-typescript-basic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/posts\/513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/comments?post=513"}],"version-history":[{"count":0,"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/posts\/513\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/media\/309"}],"wp:attachment":[{"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/media?parent=513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/categories?post=513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/junai.ai\/blog\/wp-json\/wp\/v2\/tags?post=513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}