[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_158":159,"_160":161},"routes/_app.x.$handle.$name",{"_99":98,"_32":45,"_107":89,"_27":55,"_13":14,"_108":-5,"_11":109,"_110":111,"_112":113,"_114":115,"_116":117,"_20":-5,"_118":-5,"_119":-5,"_120":25,"_121":122,"_123":124,"_125":-5,"_126":-5,"_127":128},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":-5,"_18":-5},"project",{"_43":44,"_32":45,"_38":46,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":53,"_54":55,"_18":56,"_57":-5,"_58":25,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68,"_69":70,"_71":-5,"_72":73,"_74":73,"_75":76,"_77":76,"_78":76,"_79":73,"_80":73,"_81":82,"_83":84,"_85":86,"_87":25},"version",7,"changes",[19],"aiChatInfo","userId",{"_20":21,"_22":23,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":28,"_33":34,"_35":37,"_38":39,"_40":14,"_41":42,"_24":25},"previous",{"_30":31,"_32":28,"_33":34,"_35":36},"deleted",false,"deletedHere","path","main.ts","latestPath","fileId","f3c6aeba-05ed-11f1-8ba5-42dde27851f2","name","fileType","http","content","const chapters = [\n {\n name: \"Introduction\",\n code: `// Welcome to the journey\nconsole.log(\"Hello, World!\");\n\n// This is where it all begins\nconst start = Date.now();`,\n },\n {\n name: \"Variables & Types\",\n code: `// Declaring variables\nlet name = \"Alice\";\nconst age = 30;\nvar legacy = \"avoid this\";\n\n// TypeScript types\nlet count: number = 42;\nlet active: boolean = true;\nlet items: string[] = [\"a\", \"b\"];`,\n },\n {\n name: \"Functions\",\n code: `// Function declaration\nfunction greet(name: string): string {\n return \\`Hello, \\${name}!\\`;\n}\n\n// Arrow functions\nconst add = (a: number, b: number) => a + b;\n\n// Async functions\nasync function fetchData(url: string) {\n const res = await fetch(url);\n return res.json();\n}`,\n },\n {\n name: \"Objects & Classes\",\n code: `// Object literals\nconst person = {\n name: \"Bob\",\n age: 25,\n greet() {\n return \\`Hi, I'm \\${this.name}\\`;\n }\n};\n\n// Classes\nclass Animal {\n constructor(public name: string) {}\n \n speak() {\n console.log(\\`\\${this.name} makes a sound\\`);\n }\n}`,\n },\n {\n name: \"Arrays & Iteration\",\n code: `const numbers = [1, 2, 3, 4, 5];\n\n// Map, filter, reduce\nconst doubled = numbers.map(n => n * 2);\nconst evens = numbers.filter(n => n % 2 === 0);\nconst sum = numbers.reduce((a, b) => a + b, 0);\n\n// For...of loop\nfor (const num of numbers) {\n console.log(num);\n}`,\n },\n {\n name: \"Promises & Async\",\n code: `// Creating a promise\nconst delay = (ms: number) => \n new Promise(resolve => setTimeout(resolve, ms));\n\n// Async/await\nasync function main() {\n console.log(\"Starting...\");\n await delay(1000);\n console.log(\"Done!\");\n}\n\n// Promise.all\nconst results = await Promise.all([\n fetch(\"/api/users\"),\n fetch(\"/api/posts\")\n]);`,\n },\n {\n name: \"Error Handling\",\n code: `// Try/catch\ntry {\n const data = JSON.parse(input);\n process(data);\n} catch (error) {\n console.error(\"Failed:\", error.message);\n} finally {\n cleanup();\n}\n\n// Custom errors\nclass ValidationError extends Error {\n constructor(message: string) {\n super(message);\n this.name = \"ValidationError\";\n }\n}`,\n },\n {\n name: \"Modules\",\n code: `// Named exports\nexport const PI = 3.14159;\nexport function calculate(x: number) {\n return x * PI;\n}\n\n// Default export\nexport default class Calculator {\n add(a: number, b: number) {\n return a + b;\n }\n}\n\n// Importing\nimport Calculator, { PI } from \"./math\";`,\n },\n];\n\nconst introText = `A concise guide to modern JavaScript and TypeScript. Select a chapter to explore code examples and concepts. Each chapter builds on the previous, taking you from basics to advanced patterns.`;\n\nfunction escapeHtml(str: string): string {\n return str\n .replace(/&/g, \"&\")\n .replace(//g, \">\")\n .replace(/\"/g, \""\");\n}\n\nfunction renderPage(selectedIndex: number = 0): string {\n const selected = chapters[selectedIndex];\n\n const chapterItems = chapters\n .map(\n (ch, i) => `\n \n ${String(i + 1).padStart(2, \"0\")}\n ${ch.name}\n \n `\n )\n .join(\"\");\n\n return `\n\n\n \n \n The Book\n \n\n\n

The Book

${introText}

\n\n

Chapters

\n ${chapterItems}\n

\n\n

${highlightCode(selected.code)}

\n\n`;\n}\n\nfunction highlightCode(code: string): string {\n // Escape HTML first\n let html = escapeHtml(code);\n\n // Highlight comments\n html = html.replace(/(\\/\\/.*)/g, '$1');\n\n // Highlight strings\n html = html.replace(\n /("[^&]*"|`[^`]*`|'[^']*')/g,\n '$1'\n );\n\n // Highlight keywords\n const keywords =\n /\\b(const|let|var|function|class|return|if|else|for|of|in|async|await|new|export|import|default|extends|constructor|try|catch|finally|throw|public|private)\\b/g;\n html = html.replace(keywords, '$1');\n\n // Highlight types\n html = html.replace(\n /:\\s*(string|number|boolean|void|any|Promise|Error)\\b/g,\n ': $1'\n );\n\n // Highlight numbers\n html = html.replace(/\\b(\\d+)\\b/g, '$1');\n\n // Highlight function names\n html = html.replace(\n /\\b([a-zA-Z_][a-zA-Z0-9_]*)\\s*\\(/g,\n '$1('\n );\n\n return html;\n}\n\nexport default async function (req: Request): Promise {\n const url = new URL(req.url);\n const chapterParam = url.searchParams.get(\"chapter\");\n const selectedIndex = chapterParam ? parseInt(chapterParam, 10) : 0;\n const validIndex = Math.max(0, Math.min(selectedIndex, chapters.length - 1));\n\n return new Response(renderPage(validIndex), {\n headers: { \"Content-Type\": \"text/html\" },\n });\n}\n","const chapters = [\n {\n name: \"Introduction\",\n code: `// Welcome to the journey\nconsole.log(\"Hello, World!\");\n\n// This is where it all begins\nconst start = Date.now();`,\n },\n {\n name: \"Variables & Types\",\n code: `// Declaring variables\nlet name = \"Alice\";\nconst age = 30;\nvar legacy = \"avoid this\";\n\n// TypeScript types\nlet count: number = 42;\nlet active: boolean = true;\nlet items: string[] = [\"a\", \"b\"];`,\n },\n {\n name: \"Functions\",\n code: `// Function declaration\nfunction greet(name: string): string {\n return \\`Hello, \\${name}!\\`;\n}\n\n// Arrow functions\nconst add = (a: number, b: number) => a + b;\n\n// Async functions\nasync function fetchData(url: string) {\n const res = await fetch(url);\n return res.json();\n}`,\n },\n {\n name: \"Objects & Classes\",\n code: `// Object literals\nconst person = {\n name: \"Bob\",\n age: 25,\n greet() {\n return \\`Hi, I'm \\${this.name}\\`;\n }\n};\n\n// Classes\nclass Animal {\n constructor(public name: string) {}\n \n speak() {\n console.log(\\`\\${this.name} makes a sound\\`);\n }\n}`,\n },\n {\n name: \"Arrays & Iteration\",\n code: `const numbers = [1, 2, 3, 4, 5];\n\n// Map, filter, reduce\nconst doubled = numbers.map(n => n * 2);\nconst evens = numbers.filter(n => n % 2 === 0);\nconst sum = numbers.reduce((a, b) => a + b, 0);\n\n// For...of loop\nfor (const num of numbers) {\n console.log(num);\n}`,\n },\n {\n name: \"Promises & Async\",\n code: `// Creating a promise\nconst delay = (ms: number) => \n new Promise(resolve => setTimeout(resolve, ms));\n\n// Async/await\nasync function main() {\n console.log(\"Starting...\");\n await delay(1000);\n console.log(\"Done!\");\n}\n\n// Promise.all\nconst results = await Promise.all([\n fetch(\"/api/users\"),\n fetch(\"/api/posts\")\n]);`,\n },\n {\n name: \"Error Handling\",\n code: `// Try/catch\ntry {\n const data = JSON.parse(input);\n process(data);\n} catch (error) {\n console.error(\"Failed:\", error.message);\n} finally {\n cleanup();\n}\n\n// Custom errors\nclass ValidationError extends Error {\n constructor(message: string) {\n super(message);\n this.name = \"ValidationError\";\n }\n}`,\n },\n {\n name: \"Modules\",\n code: `// Named exports\nexport const PI = 3.14159;\nexport function calculate(x: number) {\n return x * PI;\n}\n\n// Default export\nexport default class Calculator {\n add(a: number, b: number) {\n return a + b;\n }\n}\n\n// Importing\nimport Calculator, { PI } from \"./math\";`,\n },\n];\n\nconst introText =\n `A concise guide to modern JavaScript and TypeScript. Select a chapter to explore code examples and concepts. Each chapter builds on the previous, taking you from basics to advanced patterns.`;\n\nfunction escapeHtml(str: string): string {\n return str\n .replace(/&/g, \"&\")\n .replace(//g, \">\")\n .replace(/\"/g, \""\");\n}\n\nfunction renderPage(selectedIndex: number = 0): string {\n const selected = chapters[selectedIndex];\n\n const chapterItems = chapters\n .map(\n (ch, i) => `\n \n ${String(i + 1).padStart(2, \"0\")}\n ${ch.name}\n \n `,\n )\n .join(\"\");\n\n return `\n\n\n \n \n The Book\n \n\n\n

The Book

\n\n

Chapters

\n ${chapterItems}\n

\n\n

${highlightCode(selected.code)}

\n\n`;\n}\n\nfunction highlightCode(code: string): string {\n // Escape HTML first\n let html = escapeHtml(code);\n\n // Highlight comments\n html = html.replace(/(\\/\\/.*)/g, '$1');\n\n // Highlight strings\n html = html.replace(\n /("[^&]*"|`[^`]*`|'[^']*')/g,\n '$1',\n );\n\n // Highlight keywords\n const keywords =\n /\\b(const|let|var|function|class|return|if|else|for|of|in|async|await|new|export|import|default|extends|constructor|try|catch|finally|throw|public|private)\\b/g;\n html = html.replace(keywords, '$1');\n\n // Highlight types\n html = html.replace(\n /:\\s*(string|number|boolean|void|any|Promise|Error)\\b/g,\n ': $1',\n );\n\n // Highlight numbers\n html = html.replace(/\\b(\\d+)\\b/g, '$1');\n\n // Highlight function names\n html = html.replace(\n /\\b([a-zA-Z_][a-zA-Z0-9_]*)\\s*\\(/g,\n '$1(',\n );\n\n return html;\n}\n\nexport default async function (req: Request): Promise {\n const url = new URL(req.url);\n const chapterParam = url.searchParams.get(\"chapter\");\n const selectedIndex = chapterParam ? parseInt(chapterParam, 10) : 0;\n const validIndex = Math.max(0, Math.min(selectedIndex, chapters.length - 1));\n\n return new Response(renderPage(validIndex), {\n headers: { \"Content-Type\": \"text/html\" },\n });\n}","createdAt",["D",1770666140088],"branchVersion","branchId","f3c3b0f2-05ed-11f1-8ba5-42dde27851f2","id","f3c36976-05ed-11f1-8ba5-42dde27851f2","book",["D",1770665498007],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Code like a book","imageUrl","","19892fed-baf3-41fb-a5cc-96c80e95edec","pinnedFileId","pinPreview","pinMigrated","screenshotVersion","likeCount",0,"orgId","f407f111-fdbb-4126-923f-44aed4d9e9ad","tursoName","f3c3697605ed11f18ba542dde27851f2","tursoHostname","f3c3697605ed11f18ba542dde27851f2-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789521640046],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_99":98,"_106":102},"org",{"_99":98,"_100":-5,"_101":102,"_18":56,"_103":104,"_105":25},"branch",{"_13":88,"_32":89,"_43":42,"_90":44,"_91":-5,"_92":-5,"_93":-5,"_94":-5,"_95":-5,"_96":45,"_97":98},"isOwned",58,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","tmcw","handle","displayName","avatar","https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/7935dc1b-7699-4095-366a-2e9103307501/square512?exp=1789556399&sig=9f869c71e5cb2c3bbf0c75fc07f51c8b3a90a2f2fdf65736f783f53c6bb813bd","tier","pro","canRestrictVals","profileImageUrl","branchName","adoptOrgId",{"_43":44,"_32":45,"_38":153,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":53,"_54":55,"_18":56,"_57":-5,"_58":25,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68,"_69":154,"_71":-5,"_72":73,"_74":73,"_75":76,"_77":76,"_78":76,"_79":73,"_80":73,"_81":155,"_83":156,"_85":157,"_87":25},"tree",[148],"files",[148],"counts",{"_137":62,"_138":139,"_140":62,"_141":142,"_143":144},"contents",[129],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles",true,"grants","orgs","customDomains",{},{"_43":130,"_32":28,"_30":31,"_131":-5,"_41":42,"_40":14,"_132":25,"_38":133,"_13":134,"_33":34,"_35":37,"_24":25,"_135":-5,"_27":136},"727a080a-05ef-11f1-98b8-42dde27851f2","parentId","latest",["D",1770666140088],6,"label",[28],"pulls","branches",1,"forks","envVars",{"_145":139,"_147":62},"connections",{"_145":62,"_146":62},"count","unfilledCount","emptyCount",{"_43":130,"_32":28,"_30":31,"_131":-5,"_41":42,"_40":14,"_132":25,"_38":149,"_13":134,"_33":34,"_35":37,"_24":25,"_135":-5,"_150":151,"_27":152},["D",1770666140088],"children",[],[28],["D",1770665498007],["D",1789521640046],{"_99":98,"_106":102},{"_99":98,"_100":-5,"_101":102,"_18":56,"_103":104,"_105":25},{"_13":88,"_32":89,"_43":42,"_90":44,"_91":-5,"_92":-5,"_93":-5,"_94":-5,"_95":-5,"_96":45,"_97":98},"ctx",{"_81":-5,"_126":191,"_192":193,"_194":195,"_196":25,"_197":25,"_198":25,"_199":124,"_200":-5,"_201":-7,"_202":-7,"_203":62,"_204":25,"_205":25,"_206":-5,"_207":25,"_208":25,"_209":25,"_210":-5},"ENV",{"_162":163,"_164":165,"_166":89,"_167":168,"_169":170,"_171":172,"_173":174,"_175":176,"_177":178,"_179":180,"_181":182,"_183":184,"_185":186,"_187":188,"_189":190},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Diff · v7